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Comparative research on the formability of several ultra-high-strength steels
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作者 JI Dengpeng LIAN Changwei HAN Fei 《Baosteel Technical Research》 CAS 2023年第3期18-24,共7页
Three kinds of ultra-high-strength steels are subjected to uniaxial tensile,forming limit,and hole expansion tests to characterize their material forming properties.Results show that the elongation of S1500 reaches 12... Three kinds of ultra-high-strength steels are subjected to uniaxial tensile,forming limit,and hole expansion tests to characterize their material forming properties.Results show that the elongation of S1500 reaches 12.9%and is higher than that of MS1500 with the same strength grade but is lower than that of QP980.The forming limit of S1500 steel is higher than that of MS1500 but lower than that of QP980.The instantaneous n-value of the material changes with the volume fraction of retained austenite.The hole expansion ratios of S1500,MS1500,and QP980 steels are 31.3%,32.2%,and 28.3%,respectively.The hole expansion ratio of QP steel increases slightly with the increase in strength grade.This behavior is contrary to the change trend of elongation and forming limit.Among the three kinds of materials,QP980 steel has the best global formability,and S1500 steel has better global formability than martensitic steel with a similar strength grade.The local formability of the materials improves slightly with the decrease in the amount of retained austenite.MS1500 may have the best local formability in accordance with engineering practice. 展开更多
关键词 ultra-high-strength steel FORMABILITY TRIP effect
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复合喷丸工艺对A100钢表面完整性和疲劳性能的影响研究
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作者 关艳英 韩栋 +3 位作者 牛博雅 成书民 王俊斌 周姗姗 《机械设计与制造工程》 2024年第5期115-118,共4页
A100超高强度钢是航空领域中广泛用于关键承力部位的材料,其疲劳特性对零部件的使用性能有着重要影响。对A100超高强度钢在复合喷丸强化后的表面完整性和疲劳性能进行了研究,探究了复合喷丸工艺参数对A100超高强度钢零部件表面粗糙度、... A100超高强度钢是航空领域中广泛用于关键承力部位的材料,其疲劳特性对零部件的使用性能有着重要影响。对A100超高强度钢在复合喷丸强化后的表面完整性和疲劳性能进行了研究,探究了复合喷丸工艺参数对A100超高强度钢零部件表面粗糙度、显微硬度、表面残余应力、疲劳性能等的影响。结果表明:合理的复合喷丸强化能使零部件获得良好的表面完整性,显著提升其抗疲劳性能。 展开更多
关键词 a100超高强度钢 复合喷丸强化 表面完整性 疲劳性能 残余应力
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Microstructure and Mechanical Properties of Aer Met 100 Ultra-high Strength Steel Joints by Laser Welding 被引量:4
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作者 刘奋成 YU Xiaobin +3 位作者 HUANG Chunping HE Lihua CHEN Yuhua BU Wende 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2015年第4期827-830,共4页
AerMet100 ultra-high strength steel plates with a thickness of 2 mm were welded using a COz laser welding system. The influences of the welding process parameters on the morphology and microstructure of the welding jo... AerMet100 ultra-high strength steel plates with a thickness of 2 mm were welded using a COz laser welding system. The influences of the welding process parameters on the morphology and microstructure of the welding joints were investigated, and the mechanical property of the welding joints was analyzed. The experimental results showed that the fusion zone of welding joint mainly consisted of columnar grains and a fine dendrite substructure grew epitaxially from the matrix. With the other conditions remaining unchanged, a finer weld microstructure was along with the scanning speed increase. The solidification microstructure gradually transformed from cellular crystal into dendrite crystal and the spaces of dendrite secondary arms rose from the fusion line to the center of the fusion zone. In the fusion zone of the weld, the rapid cooling caused the formation of martensite, which led the microhardness of the fusion zone higher than that of the matrix and the heat affected zone. The tensile strength of the welding joints was tested as 1 700 MPa, which was about 87% of the matrix. However, the tensile strength of the welding joints without defects existed was tested as 1832 MPa, which was about 94% of the matrix. 展开更多
关键词 laser welding AerMet 100 ultra-high strength steel MICROSTRUCTURE mechanical property
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TEM observation of precipitation phase produced during tempering of steel AerMet100 and first principles calculations of phase evolution 被引量:3
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作者 WANG Xiangrong,YAN Mufu,and MENG Qingchang School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China 《Rare Metals》 SCIE EI CAS CSCD 2007年第S1期326-330,共5页
The microstructure evolution law and the structure of precipitates produced during the tempering of steel AerMet100 based on TEM observation and the calibration of diffraction spot were revealed.The electronic structu... The microstructure evolution law and the structure of precipitates produced during the tempering of steel AerMet100 based on TEM observation and the calibration of diffraction spot were revealed.The electronic structure and the stability of the MoxCr2-xC phase were calculated using the plane-wave pseudo-potential method on basis of density functional theory.TEM observations show that the precipitation phases Fe3C and Fe2-xCx(x=0.05~0.14) between martensite lath are produced at 425 and 480 ℃,respectively.The increase of tempering temperature or time can lead to the redissolution of both phases Fe3C and Fe2-xCx,and also lead to the precipitation of the phase Cr2C in martensite lath.The calculation results of formation energies and the density of state(DOS) demonstrate that in point of MoxCr2-xC structures formed during tempering,the early precipitation phase is Cr2C and finally later evolves into Mo2C phase with diffusing of incorporation of Mo atom into the Cr2C crystal cell,lattice,which can results in a energy decreases of the structure MoxCr2-xC phase with the increase of x. 展开更多
关键词 steel AerMet100 TEMPERING phase evolution formation energies DOS
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Formation and Control of Sharp {100}<021> Texture in Electrical Steel 被引量:2
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作者 WANG Jun-an ZHOU Bang-xin +2 位作者 YAO Mei-yi LI Qiang CHEN Wen-jue 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2006年第2期54-58,共5页
The formation and control of sharp{100}〈021〉texture in electrical steels were experimentally investigated and the main influencing factors were discussed.The steels of a base composition of Fe-3.2%Si with a certain ... The formation and control of sharp{100}〈021〉texture in electrical steels were experimentally investigated and the main influencing factors were discussed.The steels of a base composition of Fe-3.2%Si with a certain amount of carbon and manganese were employed to obtain{100}〈021〉texture through one stage cold rolling and annealing.The results indicated that by careful control of the amount of alloying elements and the annealing temperature,a relatively sharp{100}〈021〉texture in fairly thick sheets is obtained.After primary recrystallization,a weak component of{100}〈021〉and strong component of(447)〈18114〉texture,which constitute∑9 coincidence site lattice boundaries with a common〈011〉axis for 39°difference,are presented.This special grain boundary promotes the growth of{100}〈021〉grains in addition to the lower surface energy of(100)grains during secondary recrystallization. 展开更多
关键词 {100}〈021〉texture electrical steel RECRYSTALLIZATION grain growth
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Research on submerged arc welding wire for X100 pipeline steel 被引量:2
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作者 毕宗岳 刘海璋 +1 位作者 井晓天 牛辉 《China Welding》 EI CAS 2011年第2期56-62,共7页
According to the study of the microstructure and properties of X100 pipeline steel, the welding consumable-wire based on Mn-Ni-Mo-B-Ti alloy system was successfully designed and developed. The yield strength of the de... According to the study of the microstructure and properties of X100 pipeline steel, the welding consumable-wire based on Mn-Ni-Mo-B-Ti alloy system was successfully designed and developed. The yield strength of the deposited metal of the developed welding wire was 695 MPa, the tensile strength was 810 MPa, and Charpy impact energy was 92 J at negative 20 ℃ when matching with BSG-SJ101H1 sintered flux. The results of the weldability test for X100 pipeline steel which adopting this developed wire showed that the tensile strength of the weld was 827 MPa, 185 J of Charpy impact energy( -10 ℃ ) , 97% of section of shear and the weld had good strength and toughness matching when the welding speed got to 1.7 m/min. The microstructure and fracture appearance of the weld were analyzed by using metallographic microscope, scanning electron microscope (SEM) and laser confocal microscope, the results indicated that the microstructure was mainly granular bainite in the weld metal, and the fracture was dimple with 200 - 300 μm depth presenting a typical ductile fracture characteristics. The test of welding wire with different content of Ni and Cr element indicated that Ni was better than Cr in improving the strength and toughness of weld metal. 展开更多
关键词 X100 pipeline steel submerged arc welding welding wire
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Characteristics of 100Cr6 bearing steel after thixoforming process performed with prototype device
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作者 L.ROGAL J.DUTKIEWICZ +2 位作者 T.CZEPPE J.BONARSKI B.OLSZOWSKA-SOBIERAJ 《中国有色金属学会会刊:英文版》 CSCD 2010年第S3期1033-1036,共4页
A device based on a high pressure die-casting(HPDC) machine was constructed,with a capacity to produce thixo-casts from steel.After inductive heating to the required semi-solid temperature range,the samples were trans... A device based on a high pressure die-casting(HPDC) machine was constructed,with a capacity to produce thixo-casts from steel.After inductive heating to the required semi-solid temperature range,the samples were transported in a protective argon atmosphere to a cylinder of modified HPDC and injected into a pre-heated die.Bearing steel 100Cr6(after forging) was used as the feedstock material.The metallographic analysis of the steel showed a homogenous structure within a whole volume characterized by a grain size between 2 μm and 8 μm.Differential scanning calorimetry(DSC) analysis allowed to estimate the process temperature for thixoforming at 1 390 ?C which was attributed to about 45% of a liquid phase.With such technological parameters after the semi-solid processing the microstructure consisted of globular grains of size from 15 μm to 40 μm.The microstructure of globules indicated predominant presence of martensite(about 76% volume fraction) with residual austenite between plates.X-ray analysis confirmed that the thixo-cast samples contain mainly martensite and residual austenite.The hardness of the initial forged sample was HRC 27 and after the thixoforming process it was HRC 60,which confirms the presence of martensite and carbides.The thixo-casts were subjected to low tempering,at temperature of 150 °C for a period of 2 h,in order to remove stresses created during the process of thixoforming and to increase plasticity.The hardness after tempering was HRC 62.3.Additionally,in order to identify phases present in the thixo-casts,transmission electron microscopy(TEM) was carried out. 展开更多
关键词 SSM SEMI-SOLID METAL THIXOFORMING 100Cr6 steel
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Effect of prestrain and baking on the secondary deformation properties of cold-rolled ultra-high-strength steel sheets
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作者 XUE Peng ZHU Xiaodong LI Wei 《Baosteel Technical Research》 CAS 2020年第2期35-41,共7页
Two experimental steels with tensile strength above 980 MPa were prepared to investigate the effect of prestrain and baking on their mechanical and fracture behaviors. The experimental results reveal that,for both exp... Two experimental steels with tensile strength above 980 MPa were prepared to investigate the effect of prestrain and baking on their mechanical and fracture behaviors. The experimental results reveal that,for both experimental steels,with increases in the prestrain level,the bake hardening value increases before reaching a maximum point,and then decreases with further increases in the prestrain level. The results of a "bending-baking-secondary bending"test indicate that the secondary bendability deteriorates at a high level of prestrain. The yield strength of the experimental steels was found to increase and the elongation to decrease after high levels of prestrain and bake hardening. Fracture morphology images indicate that a high prestrain level is associated with shallow dimples and more and larger local cleavage areas. 展开更多
关键词 ultra-high-strength steel bake hardening PRESTRAIN
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Microstructure and properties of HAZ for X100 pipeline steel
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作者 胡美娟 王鹏 +2 位作者 池强 李鹤 张伟卫 《China Welding》 EI CAS 2016年第1期77-80,共4页
In general, the weld thermal cycle results in significant changes in microstructure and mechanical properties of the weld heat affected zone ( HAZ). The microstructure, microhardness and low temperature impact tough... In general, the weld thermal cycle results in significant changes in microstructure and mechanical properties of the weld heat affected zone ( HAZ). The microstructure, microhardness and low temperature impact toughness of HAZfor X100 pipeline steel were studied by means of welding thermal simulation. Influence of cooling time on the microstructure and properties in coarse-grained heat affected zone (CGHAZ) was investigated. The results illustrated that polygonal ferrite and a small amount of granular bainite were obtained when the cooling time ts/5 is larger than 1 500 s. Mainly granular bainite was formed when the cooling time t8/5 is in the range of 1500 s to 100 s. Bainite ferrite was observed when the cooling time is smaller than 60 s. Martensite appeared in the CGHAZ with the 20 s cooling time. The value of microhardness in the CGHAZ was higher than that of base metal ( BM) when the cooling time ts/s is smaller than 100 s. The CVN absorbed energy in the CGHAZ was higher than the value of BM when the cooling time t8/5 is smaller than 30 s. 展开更多
关键词 X100 pipeline steel CGHAZ MICROSTRUCTURE MICROHARDNESS impact toughness
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Influence of the secondary welding thermal cycle on the microstructure and property of coarse grain heat-affected zone in an X100 pipeline steel
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作者 张骁勇 高惠临 +1 位作者 吉玲康 庄传晶 《China Welding》 EI CAS 2010年第3期25-30,共6页
The influence of the secondary thermal cycle on the microstructure of coarse grain heat-affected zone in an XIO0 pipeline steel was investigated by means of a thermal simulation technique and microscopic analysis meth... The influence of the secondary thermal cycle on the microstructure of coarse grain heat-affected zone in an XIO0 pipeline steel was investigated by means of a thermal simulation technique and microscopic analysis method. The property of coarse grain heat-affected zone was characterized by Charpy V-Notch impact properties testing. The results indicated that the experimental steel exhibited local brittleness of intercritically reheated coarse-grained heat-affected zone when the peak tempera- ture of secondary thermal cycle was in the range of two phases region ( ~ and 3/). There were two main reasons for the local brittleness. The first was that the microstructures of intercritically reheated coarse-grained heat-affected zone were not fined although partial grain recrystallization occurred. The second was that M-A islands, which had the higher content, larger size and higher hardness, existed in intercritically reheated coarse-grained heat-affected zone. 展开更多
关键词 X100 pipeline steel secondary thermal cycle MICROSTRUCTURE coarse grain heat-affected zone
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Microstructure and Property Analysis of AerMet100 Steel Manufactured by In-situ Rolling Mixed Wire Arc Additive Manufacturing
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作者 NI Jiaming LEI Lei +3 位作者 LI Baohui LIU Siyu CHENG Peng ZHANG Haiou 《上海航天(中英文)》 CSCD 2022年第1期205-216,共12页
Aer Met100 steel thick wall is fabricated by in-situ rolling composite wire arc additive manufacturing(WAAM).The microstructure and mechanical properties of Aer Met100 steel after heat treatment are studied.The result... Aer Met100 steel thick wall is fabricated by in-situ rolling composite wire arc additive manufacturing(WAAM).The microstructure and mechanical properties of Aer Met100 steel after heat treatment are studied.The results show that after the introduction of in-situ rolling force,the grain of Aer Met100 steel is broken,the anisotropy is eliminated,and the microstructure is refined obviously.The microstructure of Aer Met100 steel after heat treatment is mainly lath martensite and reverse austenite.There are 40 nm-68.6 nm alloy carbides precipitated in the martensitic matrix,and the hardening mechanism is mainly Orowan bypass strengthening.The film-like reverse austenite with the thickness ranging from 2 nm to 5 nm exists between the martensitic lath,which improves the toughness of the maraging steel.Good combination of strength and toughness can be achieved through proper heat treatment process. 展开更多
关键词 wirearc additive manufacturing(WAAM) AerMet100 steel martensitic steel in-siturolling
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Plasma Enhanced-Chemical Vapour Deposition of Scuff-Resistant Hydrogenated Amorphous Carbon Coatings on C100 Steel
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作者 Nicoletta De Vietro Gianluigi Intonti +3 位作者 Francesco Fracassi Gianluca Quarta Lucio Maruccio Lucio Calcagnile 《Journal of Surface Engineered Materials and Advanced Technology》 2014年第3期131-139,共9页
Hydrogenated amorphous carbon coatings, deposited by low pressure plasma to minimize the wear of C100 steel components, were optimized and characterized. In order to ensure good adhesion of the films to the steel surf... Hydrogenated amorphous carbon coatings, deposited by low pressure plasma to minimize the wear of C100 steel components, were optimized and characterized. In order to ensure good adhesion of the films to the steel surface, a thin Ti interlayer was deposited, by magnetron sputtering, before the plasma deposition. The chemical characterization of the deposits was performed by means of RAMAN, XPS, RBS and ERDA analysis, while nanoindentation, nanoscratch and nanowear tests allowed to estimating the tribomechanical properties of the deposits, with the aim of evaluating their scuff-resistance. It was found that the optimized plasma deposited hydrogenated amorphous carbon coatings were well adherent to C100 steel and increased more than 70% its surface hardness. 展开更多
关键词 PE-CVD C100 steel Scuff-Resistant a-C:H COATINGS
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低温风冷微量润滑切削A-100超高强度钢工艺研究
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作者 陈家成 林立 《组合机床与自动化加工技术》 北大核心 2023年第8期153-159,共7页
针对难加工材料A-100超高强度钢的加工性能差,刀具磨损严重等问题,进行了传统切削液冷却切削与低温风冷微量润滑切削加工对比试验。通过改变冷却温度,切深和进给量参数,分析了刀具寿命变化规律,利用普赛PV4030-DCC影像仪和蔡司Gemini36... 针对难加工材料A-100超高强度钢的加工性能差,刀具磨损严重等问题,进行了传统切削液冷却切削与低温风冷微量润滑切削加工对比试验。通过改变冷却温度,切深和进给量参数,分析了刀具寿命变化规律,利用普赛PV4030-DCC影像仪和蔡司Gemini360分别观察了断屑外观形貌和刀具磨损形貌,通过相关分析法对综合加工效率的影响因素进行探究。结果表明,低温风冷微量润滑加工的刀具寿命,刀具磨损和断屑断裂形态均显著优于切削液冷却加工。当切深和进给量增加时,刀具寿命均下降。低温风冷微量润滑加工均能不同程度提升刀具寿命,并得出了最优的加工参数。影响综合加工效率的主要因素是切深,具有强相关关系。实验结果证明低温风冷微量润滑加工A-100超高强度钢具有实际加工应用前景。 展开更多
关键词 A-100超高强度钢 低温风冷微量润滑 切削加工 刀具磨损 刀具寿命
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Surface Finish Evaluation of AISI P100 Steel after Grinding with MQL Technique with Different Flow Rates
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作者 Bruno Souza Abrão Mayara Fernanda Pereira +5 位作者 Cleudes Guimarães Lurian Souza Vieira da Silva Rodrigo deSouza Ruzzi Rosemar Batista da Silva Eduardo Carlos Bianchi Alisson Rocha Machado 《Journal of Mechanics Engineering and Automation》 2020年第2期60-65,共6页
Grinding operation is a finishing process often employed when high precision and narrow geometric tolerances are required.These requirements can be achieved only if cutting conditions are properly selected,especially ... Grinding operation is a finishing process often employed when high precision and narrow geometric tolerances are required.These requirements can be achieved only if cutting conditions are properly selected,especially the cooling-lubrication technique.In general,grinding is performed in presence of cutting fluid,however,due to the environmental impacts and costs of the conventional coolant delivery technique(flow rates from 4 L/min to 300 L/min),alternative cooling-lubrication techniques have been developed on restriction of the coolants use.Among the several techniques,MQL(minimum quantity of lubricant)technique has received special attention from machining users because of its advantages in terms of surface quality of workpiece and drastic reduction in use of coolant.In this context,this paper evaluated the performance of the MQL technique as compared to the flood coolant in peripheral surface grinding of AISI P100(VP100)steel with conventional aluminum oxide grinding wheel in relation to the surface roughness(Ra and Rz).Input parameters tested were equivalent chip thickness(0.09μm,0.18μm and 0.27μm)and flow rate of the cutting fluid(60 mL/h,150 mL/h and 240 mL/h)of the MQL system.Results showed that the grinding with MQL technique provided lower surface roughness values compared to conventional flood cooling,especially when machining under the intermediary cutting conditions.Also,with exception of heq of 0.09 m,the MQL technique resulted in lower values of Rz parameter as compared to the conventional coolant technique,regardless of the flow rate tested. 展开更多
关键词 GRINDING AISI P100 steel MQL technique equivalent chip thickness surface roughness
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A-100钢晶粒显示方法研究
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作者 崔文明 李小海 +4 位作者 王纪兴 邹佳佳 张晓辰 徐淑美 王伟伟 《河南科技》 2023年第22期96-99,共4页
【目的】研究建立一套快速稳定的A-100(23Co14Ni12Cr3MoE)超高强度钢晶粒清晰显示方法。【方法】采用化学浸蚀法、氧化法和电解法腐蚀A-100钢的晶粒,并利用金相显微镜观察该钢种的晶界是否显示清晰,通过改变浸蚀溶液、温度、时间、电解... 【目的】研究建立一套快速稳定的A-100(23Co14Ni12Cr3MoE)超高强度钢晶粒清晰显示方法。【方法】采用化学浸蚀法、氧化法和电解法腐蚀A-100钢的晶粒,并利用金相显微镜观察该钢种的晶界是否显示清晰,通过改变浸蚀溶液、温度、时间、电解参数等方法调整晶粒显示效果。【结果】化学浸蚀法和电解法每次需要摸索不同的腐蚀条件,晶界显示效果不稳定,A-100钢晶粒显示最有效稳定的方式是氧化法。【结论】结合A-100钢的标准热处理制度选择885℃热氧化可获得准确清晰的晶界。 展开更多
关键词 A-100 23Co14Ni12Cr3MoE 晶粒 氧化法
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A100超高强度钢的动态再结晶行为及组织演变研究 被引量:9
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作者 任书杰 罗飞 +3 位作者 田野 刘大博 王克鲁 鲁世强 《塑性工程学报》 CAS CSCD 北大核心 2018年第4期149-157,共9页
借助Gleeble-3500热模拟试验机研究了A100超高强度钢在变形温度为850-1200℃、应变速率为0.001-10 s^(-1)和变形程度为60%条件下的热变形行为。基于实验数据计算了动态再结晶激活能,通过引入无量纲Z参数表征了动态再结晶的临界应变/... 借助Gleeble-3500热模拟试验机研究了A100超高强度钢在变形温度为850-1200℃、应变速率为0.001-10 s^(-1)和变形程度为60%条件下的热变形行为。基于实验数据计算了动态再结晶激活能,通过引入无量纲Z参数表征了动态再结晶的临界应变/应力、峰值应变/应力和稳态应变/应力模型,并绘制了动态再结晶状态图,同时对该钢的组织演变进行了分析。结果表明:该钢的动态再结晶激活能为380.177 k J·mol^(-1);随着变形温度的升高或应变速率的下降,Z参数逐渐减小,更容易发生动态再结晶行为,但其晶粒尺寸随之增大,其中在950-1050℃、0.01-0.1 s^(-1)和1050-1150℃、1-10 s^(-1)范围内进行热加工可获得细小、均匀的晶粒组织。根据实验结果建立了动态再结晶晶粒尺寸预测模型,其预测值与实验值具有较高的吻合度。 展开更多
关键词 a100超高强度钢 动态再结晶 组织演变 晶粒尺寸 热变形
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A100超高强度钢的流变应力曲线修正与唯象本构关系 被引量:10
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作者 任书杰 罗飞 +3 位作者 田野 刘大博 王克鲁 鲁世强 《材料工程》 EI CAS CSCD 北大核心 2019年第6期144-151,共8页
在Gleeble-3500型热模拟试验机上对A100超高强度钢进行热压缩实验,获得了在变形温度为850~1200℃,应变速率为0.001~10s -1 以及变形程度为60%条件下的流变应力曲线,分析热压缩过程中摩擦和温升效应对流变应力的影响,修正了流变应力曲线... 在Gleeble-3500型热模拟试验机上对A100超高强度钢进行热压缩实验,获得了在变形温度为850~1200℃,应变速率为0.001~10s -1 以及变形程度为60%条件下的流变应力曲线,分析热压缩过程中摩擦和温升效应对流变应力的影响,修正了流变应力曲线;并在Arrhenius双曲正弦函数方程的基础上引入应变量参数构建了基于应变量耦合的唯象本构模型。结果表明:随着变形温度的降低或应变速率的增加,摩擦和温升效应对流变应力的影响逐渐显著;所建立的本构模型预测值与实验值的绝对平均相对误差为4.902%,相关系数为0.99,能够用于准确预测不同应变下的流变应力。 展开更多
关键词 a100超高强度钢 流变应力曲线修正 唯象本构关系 热压缩实验
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终冷温度对X100管线钢组织与性能的影响 被引量:12
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作者 王路兵 武会宾 +2 位作者 任毅 张鹏程 唐荻 《热加工工艺》 CSCD 北大核心 2007年第14期21-23,26,共4页
通过光镜、透射电镜、背散射电子衍射技术(EBSD)、拉伸与(-20℃)冲击试验,研究了不同终冷温度对X100管线钢组织、性能的影响规律。结果表明,随终冷温度降低,针状铁素体(AF)、粒状贝氏体(GB)组织逐渐减少,板条贝氏体含量逐渐增加,钢板强... 通过光镜、透射电镜、背散射电子衍射技术(EBSD)、拉伸与(-20℃)冲击试验,研究了不同终冷温度对X100管线钢组织、性能的影响规律。结果表明,随终冷温度降低,针状铁素体(AF)、粒状贝氏体(GB)组织逐渐减少,板条贝氏体含量逐渐增加,钢板强度增高,塑韧性降低,当终冷温度在380℃左右时,少量AF、GB组织分割原奥氏体晶粒,板条贝氏体束的有效晶粒尺寸得到细化,钢板具有最优的综合力学性能,屈服强度为775 MPa,抗拉强度为855 MPa,伸长率为16.6%,-20℃冲击功为218 J,各项性能指标均满足X100管线钢的要求。 展开更多
关键词 X100管线钢 显微结构 背散射电子衍射技术(EBSD)
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AerMet100钢有效晶粒细化与逆转变奥氏体稳定性的提高 被引量:6
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作者 梁锦奎 王六定 +2 位作者 李志 王佰民 丁富才 《材料热处理学报》 EI CAS CSCD 北大核心 2010年第5期57-60,共4页
对二次硬化超高强度AerMet 100钢,通过引入预时效并优化双时效(即预时效+正常时效)工艺,膜状逆转变奥氏体(AR)中合金元素Ni、Co含量的起伏有利于提高其稳定性并降低Ms温度。高分辨透射电子显微镜(HRTEM)与扫描电子显微镜(SEM)分析表明:... 对二次硬化超高强度AerMet 100钢,通过引入预时效并优化双时效(即预时效+正常时效)工艺,膜状逆转变奥氏体(AR)中合金元素Ni、Co含量的起伏有利于提高其稳定性并降低Ms温度。高分辨透射电子显微镜(HRTEM)与扫描电子显微镜(SEM)分析表明:膜状AR在原奥氏体晶粒及马氏体铁素体(MF)板条边界形成,其间同时存在的K-S和N-W位向关系使有效晶粒由原奥氏体晶粒减小为MF板条(其厚度约80 nm);试样断面大而深的韧窝及高的撕裂棱反映出裂纹尖端钝化和分岔会吸收大量能量,在抗拉强度(σb)>2000 MPa条件下断裂韧度(KIC=127 MPa.m1/2)提高20%。 展开更多
关键词 AerMet 100 逆转变奥氏体 有效晶粒 断裂韧度 稳定性
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钢管焊缝100%检测的X射线工业电视检测方法 被引量:5
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作者 李少云 胡庆仰 +1 位作者 韩宝成 叶永春 《钢管》 CAS 2011年第4期60-62,共3页
分析了X射线工业电视检测及计算机实时成像装置,检测钢管端部焊缝时存在盲区的主要原因;介绍了钢管端部焊缝100%检测的3种方法。实践表明,在3种检测方法中,采用改变图像增强器接收屏几何尺寸的方法较优,可解决采用遮挡板、遮挡器方法时... 分析了X射线工业电视检测及计算机实时成像装置,检测钢管端部焊缝时存在盲区的主要原因;介绍了钢管端部焊缝100%检测的3种方法。实践表明,在3种检测方法中,采用改变图像增强器接收屏几何尺寸的方法较优,可解决采用遮挡板、遮挡器方法时存在的不足,满足了对钢管端部焊缝进行100%检测的要求。 展开更多
关键词 钢管 焊缝 X射线 100%检测 方法
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