期刊文献+
共找到1,328篇文章
< 1 2 67 >
每页显示 20 50 100
Friction and Wear Performance of Boron Doped, Undoped Microcrystalline and Fine Grained Composite Diamond Films 被引量:5
1
作者 WANG Xinchang WANG Liang +1 位作者 SHEN Bin SUN Fanghong 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2015年第1期155-163,共9页
Chemical vapor deposition (CVD) diamond films have attracted more attentions due to their excellent mechanical properties. Whereas as-fabricated traditional diamond films in the previous studies don't have enough a... Chemical vapor deposition (CVD) diamond films have attracted more attentions due to their excellent mechanical properties. Whereas as-fabricated traditional diamond films in the previous studies don't have enough adhesion or surface smoothness, which seriously impact their friction and wear performance, and thus limit their applications under extremely harsh conditions. A boron doped, undoped microcrystalline and fine grained composite diamond (BD-UM-FGCD) film is fabricated by a three-step method adopting hot filament CVD (HFCVD) method in the present study, presenting outstanding comprehensive performance, including the good adhesion between the substrate and the underlying boron doped diamond (BDD) layer, the extremely high hardness of the middle undoped microcrystalline diamond (UMCD) layer, as well as the low surface roughness and favorable polished convenience of the surface fine grained diamond (FGD) layer. The friction and wear behavior of this composite film sliding against low-carbon steel and silicon nitride balls are studied on a ball-on-plate rotational friction tester. Besides, its wear rate is further evaluated under a severer condition using an inner-hole polishing apparatus, with low-carbon steel wire as the counterpart. The test results show that the BD-UM-FGCD film performs very small friction coefficient and great friction behavior owing to its high surface smoothness, and meanwhile it also has excellent wear resistance because of the relatively high hardness of the surface FGD film and the extremely high hardness of the middle UMCD film. Moreover, under the industrial conditions for producing low-carbon steel wires, this composite film can sufficiently prolong the working lifetime of the drawing dies and improve their application effects. This research develops a novel composite diamond films owning great comprehensive properties, which have great potentials as protecting coatings on working surfaces of the wear-resistant and anti-frictional components. 展开更多
关键词 BD-UM-FGCD film HFCVD friction behavior wear performance application
下载PDF
Microstructure and Wear Performance of High Volume Fraction Carbide M_7C_3 Reinforced Fe-based Composite Coating Fabricated by Plasma Transferred Arc Welding 被引量:4
2
作者 袁有录 李铸国 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2014年第5期1028-1035,共8页
The fabrication of high volume fraction (HVF) M7C3 (M=Cr, Fe) reinforced Fe-based composite coating on ASTM A36 steel plate using plasma transferred arc (PTA) welding was studied. The results showed that the vol... The fabrication of high volume fraction (HVF) M7C3 (M=Cr, Fe) reinforced Fe-based composite coating on ASTM A36 steel plate using plasma transferred arc (PTA) welding was studied. The results showed that the volume fraction of carbide M7C3 was more than sixty percent, and the relative wear resistance of the coating tested on a block-on-ring dry sliding tester at constant load (100 N) and variable loads (from 100 to 300 N) respectively was about 9 and 14 times higher than that of non-reinforced a-Fe coating. In addition, under constant load condition the friction coefficients (FCs) of two coatings increased first and then decreased with increasing sliding distance. However, under variable loads condition the FCs of non-reinforced a-Fe based coating increased gradually, while that of HVF MTC3 reinforced coating decreased as the load exceeded 220 N. The worn surface of non-reinforced a-Fe based coating was easily deformed and grooved, while that of the HVF M7C3 reinforced coating was difficult to be deformed and grooved. 展开更多
关键词 high volume fraction M7C3 coatings wear performance PTA welding
下载PDF
Effect of flame conditions on abrasive wear performance of HVOF sprayed nanostructured WC-12Co coatings 被引量:5
3
作者 WANG Yu-yue LI Chang-jiu MA Jian YANG Guan-jun 《中国有色金属学会会刊:英文版》 CSCD 2004年第z1期72-76,共5页
Nanostructured WC-12Co coatings were deposited by high velocity oxy-fuel (HVOF) spraying with an agglomerated powder. The effect of flame conditions on the microstructure of the nanostructured coatings was investigate... Nanostructured WC-12Co coatings were deposited by high velocity oxy-fuel (HVOF) spraying with an agglomerated powder. The effect of flame conditions on the microstructure of the nanostructured coatings was investigated. The wear properties of the coatings were characterized using a dry rubber-wheel wear test. The results show that the nanostructured WC-Co coatings consist of WC, W2C, W and an amorphous binder phase. The microstructure of the coating is significantly influenced by the ratio of oxygen flow to fuel flow. Under the lower ratio of oxygen/fuel flow, the nanostructured coating presents a relative dense microstructure and severe decarburization of WC phase occurs during spraying. With increasing ratio of oxygen/fuel flow, the bonding of WC particles in the coating becomes loose resulting from the original structure of feedstock and the decarburization of WC becomes less owing to limited heating to the powder. Both the decarburization of WC particles in spraying and the bonding among WC particles in the coatings affect the wear performance. The examination of the worn surfaces of the nanostructured coatings reveals that the dominant wear mechanisms would be spalling from the interface of WCCo splats when spray particles undergo a limited melting. While the melting state of the spray particles is improved,the dominant wear mechanisms become the plastic deformation and plowing of the matrix and spalling of WC particles from the matrix. 展开更多
关键词 high velocity OXY-FUEL SPRAYING nanostructure abrasive wear performance WC-CO coating
下载PDF
Developing polydopamine modified molybdenum disulfide/epoxy resin powder coatings with enhanced anticorrosion performance and wear resistance on magnesium lithium alloys 被引量:5
4
作者 Shibo Chen Changqing Yin +8 位作者 Yi Wang Shuang Yi Xiang Gao Xujuan Zhang Qiyu Liao Yuxin Zhang Xia Zhao Jinsong Rao Baorong Hou 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2022年第9期2534-2545,共12页
Epoxy resin powder coating has been successfully applied on the corrosion protection of magnesium lithium alloys.However,poor wear resistance and microcracks formed during the solidification have limited it extensive ... Epoxy resin powder coating has been successfully applied on the corrosion protection of magnesium lithium alloys.However,poor wear resistance and microcracks formed during the solidification have limited it extensive application.There are limited approaches to exploit such anti-corrosion and mechanical properties of magnesium lithium alloys.Herein,the epoxy resin powder coating with polydopamine modified molybdenum disulfide(MoS_(2)@PDA-EP powder coating with 0,0.1,0.2,0.5,1.0 wt.%loading)was well prepared by melt extrusion to investigate its anticorrosion performance and wear resistance.The results revealed that the addition of MoS_(2)@PDA enhanced the adhesion strength between coatings and alloys,wear resistance and corrosion protection of the powder coatings.Among them,the optimum was obtained by 0.2 wt.%MoS_(2)@PDA-EP powder coating which could be attributed to well dispersion and efficient adhesion with coating matrix.To conclude,MoS_(2)@PDA-EP powder coating is meaningfully beneficial for the anticorrosive and wear performance improvement of magnesium lithium alloys. 展开更多
关键词 Magnesium lithium alloys Epoxy resin powder coating Molybdenum disulfide POLYDOPAMINE Anticorrosion performance wear resistance
下载PDF
Effects of zinc content on strength and wear performance of Al-12Si-3Cu based alloy 被引量:3
5
作者 Yasin ALEMDAG Murat BEDER 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第12期2463-2471,共9页
The effects of Zn content on strength and wear performance of Al-12Si-3 Cu alloy synthesized by gravity casting were systematically investigated.The microstructure and mechanical properties of the alloys were evaluate... The effects of Zn content on strength and wear performance of Al-12Si-3 Cu alloy synthesized by gravity casting were systematically investigated.The microstructure and mechanical properties of the alloys were evaluated using OM,XRD,SEM as well as hardness,tension,compression and Charpy impact tests.Their dry sliding wear tests were carried out with a ball-on-disk tester.Microscopic examinations revealed that the microstructure of the base alloy consisted of theα(Al)dendrites,needle-type and coarse Si particles,and CuAl2(θ)phase.The addition of Zn to this alloy resulted in the formation ofα-solid solution phase and the increase of coarse Si particles.The hardness,yield,tensile and compressive strengths,elongation to fracture and impact toughness of the Al-12Si-3 Cu-Zn alloys increased with increasing Zn content,but tendency in the tensile and compressive strengths and ductility reversed after adding 1.5%-2%Zn.In addition,the friction coefficient and volume loss of the Al-12Si-3 Cu-Zn alloys decreased with increasing Zn content.The study showed that the addition of Zn to Al-12Si-3 Cu alloy can improve its potential applications as tribological material. 展开更多
关键词 Al-Si-Cu alloy Zn content MICROSTRUCTURE mechanical properties wear performance
下载PDF
Estimation of wear performance of AZ91 alloy under dry sliding conditions using machine learning methods 被引量:4
6
作者 Fatih AYDIN Rafet DURGUT 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第1期125-137,共13页
The wear behavior of AZ91 alloy was investigated by considering different parameters,such as load(10−50 N),sliding speed(160−220 mm/s)and sliding distance(250−1000 m).It was found that wear volume loss increased as lo... The wear behavior of AZ91 alloy was investigated by considering different parameters,such as load(10−50 N),sliding speed(160−220 mm/s)and sliding distance(250−1000 m).It was found that wear volume loss increased as load increased for all sliding distances and some sliding speeds.For sliding speed of 220 mm/s and sliding distance of 1000 m,the wear volume losses under loads of 10,20,30,40 and 50 N were calculated to be 15.0,19.0,24.3,33.9 and 37.4 mm3,respectively.Worn surfaces show that abrasion and oxidation were present at a load of 10 N,which changes into delamination at a load of 50 N.ANOVA results show that the contributions of load,sliding distance and sliding speed were 12.99%,83.04%and 3.97%,respectively.The artificial neural networks(ANN),support vector regressor(SVR)and random forest(RF)methods were applied for the prediction of wear volume loss of AZ91 alloy.The correlation coefficient(R2)values of SVR,RF and ANN for the test were 0.9245,0.9800 and 0.9845,respectively.Thus,the ANN model has promising results for the prediction of wear performance of AZ91 alloy. 展开更多
关键词 AZ91 alloy wear performance artificial neural networks support vector regressor random forest method
下载PDF
WEARING PERFORMANCE OF STEEL BALLS IN WET GRINDING 被引量:1
7
作者 Xie Hengxing and Li Songren Department of Mineral Engineering, Central South University of Technology, Changsha 410083, P. R. China Li Dinghuo Department of Chemical Engineering, Wuhan Institute of Chemical Technology, Wuhan 430073, P. R. China 《中国有色金属学会会刊:英文版》 CSCD 1998年第4期142-145,共4页
INTRODUCTIONSteelbalsandstelrodsaretwomainkindsofgrindingmedium,butinpracticethesteelbalsaremorewidelyusedth... INTRODUCTIONSteelbalsandstelrodsaretwomainkindsofgrindingmedium,butinpracticethesteelbalsaremorewidelyusedthanstelrods[1].Tos... 展开更多
关键词 wearING performance STEEL BALL BALL mill WET GRINDING
下载PDF
Abrasive Wear Characteristics of Carbon and Low Alloy Steels for Better Performance of Farm Implements 被引量:2
8
作者 M.Kumar and R. C Gupta(Centre of Advanced Study, Dept. of Metallurgical Engineering, Institute of Technology,Banaras Hindu University, Vaanasi -221 005, India) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1995年第2期91-96,共6页
The low stress abrasion behaviours of heat treated mild, medium carbon and high C - low Cr steels, which are generally used in making farm implements, have been investigated. The simple heat treatment greatly improves... The low stress abrasion behaviours of heat treated mild, medium carbon and high C - low Cr steels, which are generally used in making farm implements, have been investigated. The simple heat treatment greatly improves the hardness, tensile strength and abrasion resistance of medium carbon and high C - low Cr steels. The results indicate that the material removal during abrasion is controlled by a number of factors, such as hardness, chemical composition, microstructure and heat treatment conditions. The conclusion is that the heat treated high C - low Cr steel and mild steel carburized by using coaltar pitch provide the best hardness and abrasion resistance and thus appear to be the most suitable materials for making agricultural tools. 展开更多
关键词 Abrasive wear Characteristics of Carbon and Low Alloy Steels for Better performance of Farm Implements MPA
下载PDF
National Joint Engineering Research Center of High Performance Metal Wear Resistant Materials Technology
9
《China Foundry》 SCIE 2019年第1期82-83,共2页
Founded in 2012,the National Joint Engineering Research Center of High Performance Metal Wear Resistant Materials Technology at Jinan University,one of the'211'key national universities in China,specializes in... Founded in 2012,the National Joint Engineering Research Center of High Performance Metal Wear Resistant Materials Technology at Jinan University,one of the'211'key national universities in China,specializes in the research and development of iron based wear resistant materials and their casting technologies to provide support to the production process.The Research Center serves the'Guangdong Province Ceeusro Innovation Platform for Common Technology of High Performance Wear Resistant Materials”,“Guangdong Province Engineering Research Center for Wear Resistant and Special Functional Materials”. 展开更多
关键词 NATIONAL JOINT Engineering Research CENTER of High performance METAL wear RESISTANT Materials Technology
下载PDF
Research on the cutting performance and the wear mechanism of the cermet cutter in high speed turn-milling
10
作者 贾春德 黄树涛 +2 位作者 姜增辉 张志军 石莉 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2005年第6期700-704,共5页
When machining D60 steel by high speed turn-milling under the different cooling and lubricating conditions, the cutting performance and the wear mechanism of the cermet cutter are researched. With water soluble coolin... When machining D60 steel by high speed turn-milling under the different cooling and lubricating conditions, the cutting performance and the wear mechanism of the cermet cutter are researched. With water soluble cooling fluid, the wear performance of the cermet cutter is bad, and does not adapt to the requirements of machining. However, when machining D60 by high speed turn-milling is under dry conditions, the wearing performance of the cermet cutter is very good and the cutting time lasts almost 3 hours. The wear mechanism of the cermet cutter under the water soluble cooling fluid is different from the dry condition. With the water soluble cooling fluid, a great deal of little chap units are formed since high frequency alternates heat stress. The crash and desquamate of these chap units is the main cause of the cutter wearing. Under dry cutting conditions, it is the main cause of cermet cutter wear in the felting phase intenerating causing rigid phase grains to fall. 展开更多
关键词 high speed cutting high speed turn-milling cermet cutter cutting performance mechanism of wearing
下载PDF
Microstructural Characteristics and Wear Performance of Plasma Sprayed Al_2O_3-13 wt. % TiO_2 Coating on the Surface of Extrusion Wheel
11
作者 ZHANG Xue-fei REN Li-min 《International Journal of Plant Engineering and Management》 2013年第3期165-172,共8页
The conventional Al2O3-13 wt. % TiO2 composite ceramic coatings are fabricated by plasma spraying on the surface of extrusion wheel. The microstrueture, morphology and phase compositions of the substrate and coat- ing... The conventional Al2O3-13 wt. % TiO2 composite ceramic coatings are fabricated by plasma spraying on the surface of extrusion wheel. The microstrueture, morphology and phase compositions of the substrate and coat- ing are investigated by using X-ray diffractometry (XRD) , scanning electron microsopy (SEM) and energy dis- persive spectroscopy (EDS). Moreover, the microhardness of the substrate and the coating are investigated using Vickers mierohardness tester, the friction and wear behaviors of the substrate and the coating are investigated by using a block-on-ring tribometer under dry sliding conditions with the load of 245 N. The results show that both γ-Al2O3 and α-Al2O3 phases are observed in the as-sprayed coatings, the mian phase is γ-Al2O3. There are white particulates Al2O3 on its surface. The Al2O3-13 wt. % TiO2 coating possesses higher mierohardness which is about 1018HV and 1.6 times that of the substrate. The wear performance of coating is better than that of the substrate. In a practical application, the life of the extrusion wheel which is plasma sprayed Al2O3-13 wt. % TiO2 coating on the surface is 1.2 times that of the conventional extrusion wheel, and the life is about 330 h. 展开更多
关键词 extrusion wheel plasma spraying Al2O3-13 wt. % TiO2 ceramic coating wear performance
下载PDF
Study on performance degradation and failure analysis of machine gun barrel 被引量:4
12
作者 Xiaolong Li Lei Mu +1 位作者 Yong Zang Qin Qin 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2020年第2期362-373,共12页
An increase in the use of the gun barrel will cause wear of the inner wall,which reduces the muzzle velocity and the spin rate of the projectile.The off-bore flight attitude and trajectory of the projectile also chang... An increase in the use of the gun barrel will cause wear of the inner wall,which reduces the muzzle velocity and the spin rate of the projectile.The off-bore flight attitude and trajectory of the projectile also change,affecting the shooting power and the accuracy.Exterior ballistic data of a high-speed spinning projectile are required to study the performance change.Therefore,based on the barrel’s accelerated life test,the whole process of projectile shooting is reproduced using numerical simulation technology,and key information on the ballistic performance change at each shooting stage are acquired.Studies have shown that in the later stages of barrel shooting,the accuracy of shooting has not decreased significantly.However,it is found that the angle of attack of the projectile increases as the wear of the barrel increases.The maximum angle of attack reaches 0.106 rad when the number of shots reaches 4300.Meanwhile,elliptical bullet hole has appeared on the target at this shooting stage.Through combining external ballistic theory with simulation results,the primary reason of this phenomenon is found to be a significant decrease in the muzzle spin rate of the projectile.At the end of the barrel life,the projectile muzzle spin rate is 57.5%lower than that of a barrel without wear. 展开更多
关键词 wear of the INNER wall ACCELERATED LIFE test Numerical simulation BALLISTIC performance End of the BARREL LIFE
下载PDF
Assessment of the curving performance of heavy haul trains under braking conditions 被引量:2
13
作者 Liangliang Yang Yu Kang +1 位作者 Shihui Luo Maohai Fu 《Journal of Modern Transportation》 2015年第3期169-175,共7页
To study the curving performance of trains, 1D and 3D dynamic models of trains were built using nu- merical methods. The 1D model was composed of 210 simple wagons, each allowed only longitudinal motion; whereas the 3... To study the curving performance of trains, 1D and 3D dynamic models of trains were built using nu- merical methods. The 1D model was composed of 210 simple wagons, each allowed only longitudinal motion; whereas the 3D model included three complicated wagons for which longitudinal, lateral, and vertical degrees of freedom were considered. Combined with the calculated results from the 1D model under braking conditions, the behavior of draft gears and brake shoes were added to the 3D model. The assessment of the curving performance of trains was focused on making comparisons between idling and braking conditions. The results indicated the following: when a train brakes on a curved track, the wheel-rail lateral force and derailment factor are greater than under idling conditions. Because the yawing movement of the wheelset is limited by brake shoes, the zone of wheel contact along the wheel tread is wider than under idling conditions. Furthermore, as the curvature becomes tighter, the traction ratio shows a nonlinear increasing trend, whether under idling or braking conditions. By increasing the brake shoe pressure, train steering becomes more difficult. 展开更多
关键词 Heavy haul train · Curving performance ·Draft gear · Brake shoe · Wheel-rail · Derailment safetyWheel wear power · Traction ratio
下载PDF
Machine Learning Assisted Design of Natural Rubber Composites with Multi⁃Performance Optimization
14
作者 Song Pang Yang Yu +1 位作者 Huanhuan Liu Youping Wu 《Journal of Harbin Institute of Technology(New Series)》 CAS 2023年第1期35-51,共17页
Multi⁃performance optimization of tread rubber composites is a key issue of great concern in automotive industry.Traditional experimental design approach via“trial and error”or intuition is ineffective due to mutual... Multi⁃performance optimization of tread rubber composites is a key issue of great concern in automotive industry.Traditional experimental design approach via“trial and error”or intuition is ineffective due to mutual inhibition among multiple properties.A“Uniform design⁃Machine learning”strategy for performance prediction and multi⁃performance optimization of tread rubber composites was proposed.The wear resistance,rolling resistance,tensile strength and wet skid resistance were simultaneously optimized.A series of feasible optimization designs were screened via statistical analysis and machine learning analysis,and were experimentally prepared.The verification experiments demonstrate that the optimization design via machine learning analysis meets the optimization requirements of all target performance,especially for Akron abrasion and 60℃tanδ(about 21%and 9%lower than the design targets,respectively)due to the inhibition of mechanical degradation and good dispersion of fillers. 展开更多
关键词 machine learning multi⁃performance optimization natural rubber wear resistance
下载PDF
Lubricating Performance of Rapeseed Oil Under Electromagnetic Field
15
作者 Jiang Zeqi Liu Ping +3 位作者 Fang Jianhua Chen Boshui Gu Kecheng Wu Jiang 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2018年第1期85-92,共8页
Considering electromagnetic effect when investigating tribological properties of rapeseed oil is benefical not only to the improvement of green lubrication, but also to the development of tribology theories and practi... Considering electromagnetic effect when investigating tribological properties of rapeseed oil is benefical not only to the improvement of green lubrication, but also to the development of tribology theories and practices. In the present paper, the tribological properties of rapeseed oil under different intensity of electromagnetic field and normal loads were evaluated on a modified tribo-tester. The results indicated that the electromagnetic field could improve the anti-wear and friction-reducing property of the rapeseed oil. Furthermore, the influencing mechanisms were discussed from the perspective of electromagnetism according to the analytical results of SEM, EDS and XPS techniques. 展开更多
关键词 RAPESEED oil ELECTROMAGNETIC field anti-wear PROPERTY FRICTION-REDUCING performance
下载PDF
Wear behavior of SiC/PyC composite materials prepared by electromagnetic-field-assisted CVI 被引量:1
16
作者 涂川俊 黄启忠 +3 位作者 熊贤至 谢志勇 蔡利辉 陈珊 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第3期856-862,共7页
Silicon carbide/pyrolytic carbon (SiC/PyC) composite materials with excellent performance of self-lubrication and wear resistance were prepared on SiC substrates by electromagnetic-field-assisted chemical vapor infilt... Silicon carbide/pyrolytic carbon (SiC/PyC) composite materials with excellent performance of self-lubrication and wear resistance were prepared on SiC substrates by electromagnetic-field-assisted chemical vapor infiltration (CVI). The composition and microstructure of the SiC/PyC materials were investigated in detail by XRD, SEM and EDS, etc. The effects of the deposition temperature on the section features and wear resistance of the SiC/PyC were studied. The results show that the PyC layers were deposited onto SiC substrates spontaneously at a lower deposition temperature. The SiC substrates deposited with PyC can significantly reduce the wear rate of the self-dual composite materials under dry sliding condition. The wear tests suggest that the SiC/PyC composite materials own a better wear resistance property when the deposition temperature is 800 °C, and the wear rate is about 64.6% of that without the deposition of PyC. 展开更多
关键词 SiC/PyC composite materials wear performance SELF-LUBRICATING chemical vapor infiltration interfacial adsorption
下载PDF
不同品种炭黑在天然橡胶体系配方中的应用研究
17
作者 李维鸽 封盼 +1 位作者 王暖 沈春和 《橡塑技术与装备》 CAS 2025年第1期37-40,共4页
研究3种炭黑(N234,PROPEL^(R)E8和MH168S)在天然橡胶体系配方中的性能差异。实验结果表明:在天然橡胶为生胶体系的配方中,采用不同品种炭黑进行物性对比,炭黑N234填充的胶料的加工性能优于炭黑PROPEL^(R)E8和MH168S,炭黑MH168S补强性能... 研究3种炭黑(N234,PROPEL^(R)E8和MH168S)在天然橡胶体系配方中的性能差异。实验结果表明:在天然橡胶为生胶体系的配方中,采用不同品种炭黑进行物性对比,炭黑N234填充的胶料的加工性能优于炭黑PROPEL^(R)E8和MH168S,炭黑MH168S补强性能最优,炭黑PROPEL^(R)E8居中;炭黑N234填充胶料的阿克隆磨耗性能最优,炭黑PROPEL^(R)E8填充胶料具有最低的滚动阻力。 展开更多
关键词 炭黑 天然橡胶体系配方 比表面积 结构度 补强性能 磨耗性能
下载PDF
A review on the hydraulic performance and erosion wear characteristic of the centrifugal slurry pump
18
作者 Aoqiang Duan Zhe Lin +1 位作者 Desheng Chen Yi Li 《Particuology》 SCIE EI CAS CSCD 2024年第12期370-392,共23页
The centrifugal slurry pump is widely applied for the transportation of liquid medium containing solid particles.The introduction of solid particles will lead to a decrease in efficiency and wear of the slurry pump.To... The centrifugal slurry pump is widely applied for the transportation of liquid medium containing solid particles.The introduction of solid particles will lead to a decrease in efficiency and wear of the slurry pump.To solve this problem,it is imperative to review the hydraulic performance and erosion characteristic of slurry pumps under solid-liquid two-phase flow in recent years.In this review,firstly,the general structure and engineering application are introduced.Next,the experimental and simulation research methods of particle movement and erosion wear are explored.Then,the influence of solid particles on the hydraulic performance and particle distribution is analyzed.Afterwards,the variation laws of erosion wear under different flow-passing components and particle properties are clarified.Finally,according to the current research status and conclusions,the design optimization measures and future investigate direction are proposed,aiming to promote the resolution of wear damage and extend the service life of the slurry pump. 展开更多
关键词 Centrifugal slurry pump Solid-liquid two-phase flow Hydraulic performance Particle distribution Erosion wear damage
原文传递
WEAR FAILURE MECHANISM AND MULTI-IMPACT PROPERTY OF AUTOMOTIVE ENGINE CHAIN 被引量:12
19
作者 Meng Fanzhong Wang Shukun +2 位作者 Lan Hong Xu Rongjin Xu Hanxue 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2005年第3期401-404,共4页
The multi-impact characteristics and failure mechanism of two kinds of automotive engine chain made in China are studied through engine assembly and road-drive tests. The worn surface morphologies of rubbing area betw... The multi-impact characteristics and failure mechanism of two kinds of automotive engine chain made in China are studied through engine assembly and road-drive tests. The worn surface morphologies of rubbing area between pin, bush and roller are also analyzed based on scanning electron microscope. The results show that the main wear mechanism of automotive engine chain is fatigue wear, and its failure mechanism is the forming, extending and flaking of cracks on top layer of pin and bush. In addition, the material, hot-treatment method and shaping technique for roller have a great influence upon the resistance to multi-impact. Ensuring sufficient strength and plasticity of roller, as well as adopting suitable shaping technique are the effective method to increase its resistance to multi-impact. 展开更多
关键词 Automotive engine chain wear mechanism Cold-extruding roller Resistance to multi-impact Cycle performance
下载PDF
Corrosion and wear properties of TB2 titanium alloy borided by pack boriding with La_(2)O_(3) 被引量:2
20
作者 De-yi QU Dan LIU +2 位作者 Xin-yu WANG Yong-hua DUAN Ming-jun PENG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第3期868-881,共14页
To improve the surface performance of TB2 alloy,pack boriding was performed at 1100℃ for 20 h with 4 wt.%La_(2)O_(3).The composition and thickness of boride layer and corrosion and wear properties of borided TB2 allo... To improve the surface performance of TB2 alloy,pack boriding was performed at 1100℃ for 20 h with 4 wt.%La_(2)O_(3).The composition and thickness of boride layer and corrosion and wear properties of borided TB2 alloy were measured.The results show that La_(2)O_(3) can promote the growth,continuity,and compactness of boride layer,and the length of TiB whisker increases from 16.80 to 21.84μm.The reason is that La_(2)O_(3) can react with B to form La−B active groups and further to improve the growth of the boride layer.The wear and corrosion resistances of TB2 alloy are enhanced by boriding with La_(2)O_(3).The wear mechanisms are adhesive wear and abrasive wear for unborided and borided TB2 alloys,respectively,and the corrosion mechanism is changed from local corrosion(unborided TB2 alloy)to uniform corrosion(borided TB2 alloy). 展开更多
关键词 TB2 alloy pack boriding wear properties corrosion performance
下载PDF
上一页 1 2 67 下一页 到第
使用帮助 返回顶部