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苏州“轧神仙”习俗活动中的丝织文旅产品创新设计研究 被引量:1
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作者 倪敏 倪韵婷 《辽宁丝绸》 2023年第4期6-7,共2页
通过苏州“轧神仙”习俗活动和非遗丝织文旅产品的展示展演,将创新再设计二组系列丝织文旅小商品投放到今年苏州“轧神仙”习俗活动中去,目的是丰富市场产品的品种。
关键词 苏州“轧神仙”习俗活动 丝织文旅小商品 创新设计研究
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Ultrahigh strength and improved electrical conductivity in an aging strengthened copper alloy processed by combination of equal channel angular pressing and thermomechanical treatment
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作者 WANG Xu LI Zhou +1 位作者 MENG Xiang-peng XIAO Zhu 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第6期1823-1837,共15页
In this paper,equal channel angular pressing and thermomechanical treatment was employed to improve the strength and electrical conductivity of an aging strengthened Cu-Ti-Cr-Mg alloy,and the microstructure and proper... In this paper,equal channel angular pressing and thermomechanical treatment was employed to improve the strength and electrical conductivity of an aging strengthened Cu-Ti-Cr-Mg alloy,and the microstructure and properties of the alloy were investigated in detail.The results showed that the samples deformed by the combination of cryogenic equal channel angular pressing(ECAP)and rolling had good comprehensive properties after aging at 400℃.The tensile strength of the peak-aged and over-aged samples was 1120 MPa and 940 MPa,with their corresponding electrical conductivity of 14.7%IACS and 22.1%IACS,respectively.ECAP and cryogenic rolling introduced high density dislocations,leading to the inhibition of the softening effects and refinement of the grains.After a long time aging at 400℃,the alloy exhibited ultra-high strength with obvious increasing electrical conductivity.The high strength was attributed to the synergistic effect of work hardening,grain refinement strengthening and precipitation strengthening.The precipitation of a large amount of Ti atoms from the matrix led to the high electrical conductivity of the over-aged sample. 展开更多
关键词 Cu-Ti alloy equal channel angular pressing ROLLING aging treatment high strength
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Effects of cold rolling path on recrystallization behavior and mechanical properties of pure copper during annealing
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作者 Jing CHEN Wen-jie XU +8 位作者 Jia-hao YANG Zhi YANG Hong-li SHI Gao-yong LIN Zhu-min LI Xu SHEN Bo JIANG Hui-qun LIU Kai-xuan GUI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第10期3233-3250,共18页
The recrystallization behavior,grain boundary characteristic distribution,and mechanical properties of pure Cu sheets that were subjected to different cold rolling paths,and then annealed at 400°C for 10,30,60,an... The recrystallization behavior,grain boundary characteristic distribution,and mechanical properties of pure Cu sheets that were subjected to different cold rolling paths,and then annealed at 400°C for 10,30,60,and 420 min,were investigated.Different rolling paths changed the grain boundary orientations of cold-rolled copper,causing recrystallized grains to nucleate and grow in an oriented manner.However,the evolution of the texture indicated that cold-rolled copper with different rolling paths did not show an obvious preferred orientation after annealing.The RD-60 specimen exhibited the smallest grain size(6.6μm).The results indicated that the grain size and low-ΣCSL grain boundaries worked together to provide RD-60 samples with appropriate mechanical properties and high plasticity.The yield strength,ultimate tensile strength,and elongation of RD-60 sample were 81 MPa,230 MPa,and 49%,respectively.These results could provide guidance for tuning the microstructures and properties of pure Cu foils,as well as designing fabrication routes for pure Cu foils through processes such as rolling and drawing. 展开更多
关键词 rolling path grain boundary characteristic distribution pure copper mechanical properties
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Bonding enhancement of cold rolling TA1 P-Ti/AA6061 composite plates via surface oxidation treatment
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作者 Lun FU Bin YANG +2 位作者 Yun-chang GUO Chao YU Hong XIAO 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第9期2864-2880,共17页
TA1 P-Ti/AA6061 composite plate was produced by oxidizing the surface of the titanium plate and adopting a cold roll bonding process.The results revealed that the oxide film(Ti6O)prepared on the surface of TA1 pure ti... TA1 P-Ti/AA6061 composite plate was produced by oxidizing the surface of the titanium plate and adopting a cold roll bonding process.The results revealed that the oxide film(Ti6O)prepared on the surface of TA1 pure titanium was easy to crack during the cold roll bonding,thereby promoting the formation of an effective mechanical interlock at the interface,which can effectively reduce the minimum reduction rate of the composite plates produced by cold rolling of titanium and aluminium plates.Moreover,the composite plate subjected to oxidation treatment exhibited high shear strength,particularly at a 43%reduction rate,achieving a commendable value of 117 MPa.Based on oxidation treatment and different reduction rates,the annealed composite plates at temperatures of 400,450,and 500°C displayed favorable resistance to interface delamination,highlighting their remarkable strength-plasticity compatibility as evidenced by a maximum elongation of 31.845%. 展开更多
关键词 TA1 P-Ti/AA6061 composite plate oxidation treatment annealing treatment cold roll bonding
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Influence of thermomechanical treatment on recrystallization and softening resistance of Cu-6.5Fe-0.3Mg alloy
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作者 Zhen-xia LIU Da-wei YUAN +5 位作者 Xin LUO Lan-hao WANG Jin-shui CHEN Hui-ming CHEN Xiang-peng XIAO Bin YANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第9期2900-2917,共18页
The recrystallization and softening resistance of a Cu-6.5Fe-0.3Mg(mass fraction,%)alloy prepared by Process 1(cold rolling heat treatment)and Process 2(hot/cold rolling heat treatment)were studied using Vickers hardn... The recrystallization and softening resistance of a Cu-6.5Fe-0.3Mg(mass fraction,%)alloy prepared by Process 1(cold rolling heat treatment)and Process 2(hot/cold rolling heat treatment)were studied using Vickers hardness tests,tensile tests,scanning electron microscopy and transmission electron microscopy.The softening temperature,hardness and tensile strength of the alloy prepared by Process 2 were 110°C,HV 15 and 114 MPa higher,respectively,than those of the alloy prepared by Process 1 after aging at 300°C.The recrystallization activation energy of the alloys prepared by Process 1 and Process 2 were 72.83 and 98.11 kJ/mol,respectively.The pinning effects of the precipitates of the two alloys on grain boundaries and dislocations were basically the same.The softening mechanism was mainly attributed to the loss of dislocation strengthening.The higher Fe fiber density inhibited the average free migration path of dislocations and grain boundary migration in the alloy,which was the main reason for higher softening temperature of the alloy prepared by Process 2. 展开更多
关键词 Cu−6.5Fe−0.3Mg alloy hot rolling recrystallization activation energy softening mechanism dislocation strengthening
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High density dislocations enhance creep ageing response and mechanical properties in 2195 alloy sheet
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作者 WEI Shuo MA Pei-pei +3 位作者 CHEN Long-hui YANG Jian-shi ZHAN Li-hua LIU Chun-hui 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第7期2194-2209,共16页
The creep strain of conventionally treated 2195 alloy is very low,increasing the difficulty of manufacturing Al-Cu-Li alloy sheet parts by creep age forming.Therefore,finding a solution to improve the creep formabilit... The creep strain of conventionally treated 2195 alloy is very low,increasing the difficulty of manufacturing Al-Cu-Li alloy sheet parts by creep age forming.Therefore,finding a solution to improve the creep formability of Al-Cu-Li alloy is vital.A thorough comparison of the effects of cryo-deformation and ambient temperature large pre-deformation(LPD)on the creep ageing response in the 2195 alloy sheet at 160℃with different stresses has been made.The evolution of dislocations and precipitates during creep ageing of LPD alloys are revealed by X-ray diffraction and transmission electron microscopy.High-quality 2195 alloy sheet largely pre-deformed by 80%without edge-cracking is obtained by cryo-rolling at liquid nitrogen temperature,while severe edge-cracking occurs during room temperature rolling.The creep formability and strength of the 2195 alloy are both enhanced by introducing pre-existing dislocations with a density over 1.4×10^(15)m^(−2).At 160℃and 150 MPa,creep strain and creep-aged strength generally increases by 4−6 times and 30−50 MPa in the LPD sample,respectively,compared to conventional T3 alloy counterpart.The elongation of creep-aged LPD sample is low but remains relevant for application.The high-density dislocations,though existing in the form of dislocation tangles,promote the formation of refined T1 precipitates with a uniform dispersion. 展开更多
关键词 creep ageing Al-Cu-Li alloy high dislocation density cryogenic rolling dislocation strengthening
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Effect of annealing temperature on microstructure and mechanical properties of Mg-Zn-Zr-Nd alloy with large final rolling deformation
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作者 ZHANG Jin-hai NIE Kai-bo +2 位作者 ZHANG Jin-hua DENG Kun-kun LIU Zhi-long 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第6期1774-1789,共16页
In this study,the Mg-3Zn-0.5Zr-χNd(χ=0,0.6)alloys were subjected to final rolling treatment with large deformation of 50%.The impact of annealing temperatures on the microstructure and mechanical properties was inve... In this study,the Mg-3Zn-0.5Zr-χNd(χ=0,0.6)alloys were subjected to final rolling treatment with large deformation of 50%.The impact of annealing temperatures on the microstructure and mechanical properties was investigated.The rolled Mg-3Zn-0.5Zr-0.6Nd alloy exhibited an ultimate tensile strength of 386 MPa,a yield strength of 361 MPa,and an elongation of 7.1%.Annealing at different temperatures resulted in reduced strength and obviously increased elongation for both alloys.Optimal mechanical properties for the Mg-3Zn-0.5Zr-0.6Nd alloy were achieved after annealing at 200℃,with an ultimate tensile strength of 287 MPa,a yield strength of 235 MPa,and an elongation of 26.1%.The numerous deformed microstructures,twins,and precipitated phases in the rolled alloy could impede the deformation at room temperature and increase the work hardening rate.After annealing,a decrease in the work hardening effect and an increase in the dynamic recovery effect were obtained due to the formation of fine equiaxed grains,and the increased volume fraction of precipitated phases,which significantly improved the elongation of the alloy.Additionally,the addition of Nd element could enhance the annealing recrystallization rate,reduce the Schmid factor difference between basal and prismatic slip systems,facilitate multi-system slip initiation and improve the alloy plasticity. 展开更多
关键词 Mg-Zn-Zr-Nd alloy large final rolling deformation annealing temperatures microstructures mechanical properties
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Effect of thermo-mechanical treatment on microstructure and mechanical properties of wire-arc additively manufactured Al-Cu alloy
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作者 ZHANG Tao QIN Zhen-yang +2 位作者 GONG Hai WU Yun-xin CHEN Xin 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第7期2181-2193,共13页
Wire-arc additive manufacture(WAAM)has great potential for manufacturing of Al-Cu components.However,inferior mechanical properties of WAAM deposited material restrict its industrial application.Inter-layer cold rolli... Wire-arc additive manufacture(WAAM)has great potential for manufacturing of Al-Cu components.However,inferior mechanical properties of WAAM deposited material restrict its industrial application.Inter-layer cold rolling and thermo-mechanical heat treatment(T8)with pre-stretching deformation between solution and aging treatment were adopted in this study.Their effects on hardness,mechanical properties and microstructure were analyzed and compared to the conventional heat treatment(T6).The results show that cold rolling increases the hardness and strengths,which further increase with T8 treatment.The ultimate tensile strength(UTS)of 513 MPa and yield stress(YS)of 413 MPa can be obtained in the inter-layer cold-rolled sample with T8 treatment,which is much higher than that in the as-deposited samples.The cold-rolled samples show higher elongation than that of as-deposited ones due to significant elimination of porosity in cold rolling;while both the T6 and T8 treatments decrease the elongation.The cold rolling and pre-stretching deformation both contribute to the formation of dense and dispersive precipitatedθ′phases,which inhibits the dislocation movement and enhances the strengths;as a result,T8 treatment shows better strengthening effect than the T6 treatment.The strengthening mechanism was analyzed and it was mainly related to work hardening and precipitation strengthening. 展开更多
关键词 wire-arc additive manufacture inter-layer cold rolling thermal-mechanical treatment microstructure mechanical properties strengthening mechanism
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Multi-dimension and multi-modal rolling mill vibration prediction model based on multi-level network fusion
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作者 CHEN Shu-zong LIU Yun-xiao +3 位作者 WANG Yun-long QIAN Cheng HUA Chang-chun SUN Jie 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第9期3329-3348,共20页
Mill vibration is a common problem in rolling production,which directly affects the thickness accuracy of the strip and may even lead to strip fracture accidents in serious cases.The existing vibration prediction mode... Mill vibration is a common problem in rolling production,which directly affects the thickness accuracy of the strip and may even lead to strip fracture accidents in serious cases.The existing vibration prediction models do not consider the features contained in the data,resulting in limited improvement of model accuracy.To address these challenges,this paper proposes a multi-dimensional multi-modal cold rolling vibration time series prediction model(MDMMVPM)based on the deep fusion of multi-level networks.In the model,the long-term and short-term modal features of multi-dimensional data are considered,and the appropriate prediction algorithms are selected for different data features.Based on the established prediction model,the effects of tension and rolling force on mill vibration are analyzed.Taking the 5th stand of a cold mill in a steel mill as the research object,the innovative model is applied to predict the mill vibration for the first time.The experimental results show that the correlation coefficient(R^(2))of the model proposed in this paper is 92.5%,and the root-mean-square error(RMSE)is 0.0011,which significantly improves the modeling accuracy compared with the existing models.The proposed model is also suitable for the hot rolling process,which provides a new method for the prediction of strip rolling vibration. 展开更多
关键词 rolling mill vibration multi-dimension data multi-modal data convolutional neural network time series prediction
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“轧烘焙”工艺设备在纺织品功能性后整理中的应用研究 被引量:1
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作者 谭永贵 《纺织机械》 2012年第6期17-23,共7页
对纺织品进行功能性后整理提升及拓展其功能已成为越来越普遍的加工方法,采用化学助剂整理法便是主要途径之一。"轧烘焙"连续化工艺设备可满足如柔软整理、树脂整理、免烫防皱整理、拒水,拒污,拒油整理、易去污整理、阻燃整... 对纺织品进行功能性后整理提升及拓展其功能已成为越来越普遍的加工方法,采用化学助剂整理法便是主要途径之一。"轧烘焙"连续化工艺设备可满足如柔软整理、树脂整理、免烫防皱整理、拒水,拒污,拒油整理、易去污整理、阻燃整理、防静电整理、防紫外线整理、防腐防霉整理等化学助剂法整理工艺要求。网带式松式烘燥机亦可作为上述整理方法的"烘焙"工艺设备,并可获得理想的防缩及柔软整理效果。 展开更多
关键词 功能性后整理 化学助剂法 “轧烘焙”设备
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匈奴刑法新解——兼论秦汉时期匈奴法律的立法目的与特点 被引量:3
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作者 于凌 李焕青 刘举 《黑龙江民族丛刊》 CSSCI 北大核心 2008年第1期104-107,共4页
在匈奴刑法中,"刃尺"是针对不足汉代一尺的短剑、铜刀、铁刀而言,所谓"拔刃尺者死"是指对以生活必备的刀剑伤人者处以极刑;"轧"是以匈奴随手可得的车辐在小腿到脚踝的部位施刑。这说明匈奴法律的立法包... 在匈奴刑法中,"刃尺"是针对不足汉代一尺的短剑、铜刀、铁刀而言,所谓"拔刃尺者死"是指对以生活必备的刀剑伤人者处以极刑;"轧"是以匈奴随手可得的车辐在小腿到脚踝的部位施刑。这说明匈奴法律的立法包括对匈奴人生命的保护以及形成强烈的震慑作用,同时也反映出匈奴法律严苛的特点。 展开更多
关键词 匈奴 刑法 “刃尺” “轧”
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Prediction of edge cracks and plastic-damage analysis of Mg alloy sheet in rolling 被引量:11
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作者 张丁非 戴庆伟 +1 位作者 方霖 徐杏杏 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第5期1112-1117,共6页
A thermal-mechanical-damage coupled finite elements model was established to investigate temperature changes, edge cracks and rolling force during roiling of magnesium alloy sheet. A cuneal sheet was also adopted to s... A thermal-mechanical-damage coupled finite elements model was established to investigate temperature changes, edge cracks and rolling force during roiling of magnesium alloy sheet. A cuneal sheet was also adopted to study the influence of reduction on temperature, damage and rolling force. The results show that with increasing the reduction, the rolling force increases, and the temperature of the Mg sheet decreases. Edge cracks occur when the reduction is above 51.6%, with the damage value of above 0.49. The plastic-damage in Mg sheet rolling is a result of hole development, shearing deformation and accumulative plastic strain. 展开更多
关键词 magnesium alloys finite element analysis ROLLING DAMAGE
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Interfacial structure and mechanical properties of hot-roll bonded joints between titanium alloy and stainless steel using niobium interlayer 被引量:10
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作者 赵东升 闫久春 +1 位作者 刘玉君 纪卓尚 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第9期2839-2844,共6页
The hot-roll bonding was carried out in vacuum between titanium alloy and stainless steel using niobium interlayer. The interfacial structure and mechanical properties were analyzed. The results show that the plastici... The hot-roll bonding was carried out in vacuum between titanium alloy and stainless steel using niobium interlayer. The interfacial structure and mechanical properties were analyzed. The results show that the plasticity of bonded joint is improved significantly. When the bonding temperature is 800 °C or 900 °C, there is not intermetallic layer at the interface between stainless steel and niobium. When the bonding temperature is 1000 °C or 1050 °C, Fe-Nb intermetallic layer forms at the interface. When the bonding temperature is 1050 °C, cracking occurs between stainless steel and intermetallic layer. The maximum strength of -417.5 MPa is obtained at the bonding temperature of 900 °C, the reduction of 25% and the rolling speed of 38 mm/s, and the tensile specimen fractures in the niobium interlayer with plastic fracture characteristics. When the hot-roll bonded transition joints were TIG welded with titanium alloy and stainless steel respectively, the tensile strength of the transition joints after TIG welding is -410.3 MPa, and the specimen fractures in the niobium interlayer. 展开更多
关键词 hot roll bonding titanium alloy stainless steel NIOBIUM
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Effects of cold rolling and heat treatment on microstructure and mechanical properties of AA 5052 aluminum alloy 被引量:15
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作者 王博 陈先华 +2 位作者 潘复生 毛建军 方勇 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第8期2481-2489,共9页
The microstructures and mechanical properties of homogenized-rolled AA5052 aluminum alloys with different rolling reductions and following annealing treatments were investigated by optical microscope, scanning electro... The microstructures and mechanical properties of homogenized-rolled AA5052 aluminum alloys with different rolling reductions and following annealing treatments were investigated by optical microscope, scanning electron microscope, X-ray diffractometer, micro-hardness and tensile tests. The results show that with increasing rolling reduction, the equiaxed grains are elongated along the rolling direction obviously, and accumulation of rolling reduction increases the work hardening effect, which results in the enhanced strength and degraded plasticity. When rolling reduction is 87%, the ultimate tensile strength reaches 325 MPa but elongation is only 2.5%. There are much more secondary phase precipitates after annealing treatment. With an increase of annealing temperature, the amount of precipitates increases and work hardening diminishes continuously. The elongation is improved to ~23% but the tensile strength is decreased to 212 MPa after annealing at 300 °C for 4 h, which are comparable to those of as-homogenized alloy. 展开更多
关键词 AA5052 aluminum alloy cold rolling ANNEALING MICROSTRUCTURE mechanical properties
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Continuous extrusion and rolling forming velocity of copper strip 被引量:10
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作者 运新兵 游伟 +2 位作者 赵颖 李冰 樊志新 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第4期1108-1113,共6页
A new copper strip production technology combined with continuous extrusion and rolling technology was proposed. The roll velocity must first be matched with the continuous extrusion velocity to achieve continuous ext... A new copper strip production technology combined with continuous extrusion and rolling technology was proposed. The roll velocity must first be matched with the continuous extrusion velocity to achieve continuous extrusion and roll forming. The bite condition of continuous extrusion was determined, and the compatibility equation between the roll velocity and parameters such as the extrusion wheel velocity, reduction, and strip size was established through mechanical by plastic theoretical calculations. The finite element model of continuous extrusion and rolling was then established by using the TLJ400 continuous extrusion machine with a roll diameter of 200 mm. The relationship between the continuous extrusion and rolling velocities was determined through numerical simulations by software DEFORM-3D, and the accuracy of compatibility equation of velocity was verified. 展开更多
关键词 copper strip continuous extrusion and rolling bite condition compatibility equation of velocity
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Adaptive Modification of the Rolling Force Prediction 被引量:7
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作者 姚小兰 张迪生 +1 位作者 梁启宏 胡浩平 《Journal of Beijing Institute of Technology》 EI CAS 2002年第1期33-36,共4页
In rolling process, the rolling force is an important parameter. The precision of the predicted rolling force will directly affect the precision of the finished product. By using adaptive control theory and fusing the... In rolling process, the rolling force is an important parameter. The precision of the predicted rolling force will directly affect the precision of the finished product. By using adaptive control theory and fusing the measured and predicted data, the precision of the predicted rolling force is gradually improved. This system has been used in plant for more than one year, and the result of the application shows that the system has steady and reliable performance, and high precision. 展开更多
关键词 hot rolling four high mill automatic gauge control bender roller
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Strength enhancement of Mg-3Gd-1Zn alloy by cold rolling 被引量:6
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作者 吴迪 唐伟能 +1 位作者 陈荣石 韩恩厚 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第2期301-306,共6页
The severe cold rolling was employed to enhance strength of Mg-3Gd-lZn (mass fraction, %) alloy sheet. The 0.2% yield stress of the Mg-3Gd-1Zn hot-rolled sheet can be increased by 150% through the single-pass cold r... The severe cold rolling was employed to enhance strength of Mg-3Gd-lZn (mass fraction, %) alloy sheet. The 0.2% yield stress of the Mg-3Gd-1Zn hot-rolled sheet can be increased by 150% through the single-pass cold rolling with the reduction of 23%, due to the high intensity of dislocation and basal texture established during cold rolling. Compared with the Mg-3Gd-lZn hot-rolled sheet, the cold-rolled sheet annealed at 350 for 30 min may get an enhancement in strength without a great loss of ductility. The sheet processed by multi-pass cold rolling does not show a higher strength as expected, due to the softening effect of shear bands. However, the thin slab with the thickness less than 1 mm can be produced by the multi-pass cold rolling with the annealing treatment as few as possible. 展开更多
关键词 magnesium alloys cold rolling STRENGTH TEXTURE
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Effect of stacking fault energy on mechanical properties of ultrafine-grain Cu and Cu-Al alloy processed by cold-rolling 被引量:7
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作者 伞星源 梁晓光 +2 位作者 程莲萍 沈黎 朱心昆 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第4期819-824,共6页
Cu,Cu-2.2%Al and Cu-4.5%Al with stacking fault energies(SFE) of 78,35 and 7 mJ/m2 respectively were processed by cold-rolling(CR) at liquid nitrogen temperature(77 K) after hot-rolling.X-ray diffraction measurem... Cu,Cu-2.2%Al and Cu-4.5%Al with stacking fault energies(SFE) of 78,35 and 7 mJ/m2 respectively were processed by cold-rolling(CR) at liquid nitrogen temperature(77 K) after hot-rolling.X-ray diffraction measurements indicate that a decrease in SFE leads to a decrease in crystallite size but increase in microstrain,dislocation and twin densities of the CR processed samples.Tensile tests at room temperature indicate that as the stacking fault energy decreases,the strength and ductility increase.The results indicate that decreasing stacking fault energy is an optimum method to improve the ductility without loss of strength. 展开更多
关键词 CU Cu alloys COLD-ROLLING tensile tests stacking fault energy
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Microstructure and properties of rare earth-containing Cu-Cr-Zr alloy 被引量:21
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作者 潘振亚 陈讲彪 李金富 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第4期1206-1214,共9页
Cu-0.81Cr-0.12Zr-0.05La-0.05Y(mass fraction) alloy was successively subjected to hot rolling, solid solution treatment, cold rolling and aging treatments. Its microstructure, microhardness and electrical conductivity ... Cu-0.81Cr-0.12Zr-0.05La-0.05Y(mass fraction) alloy was successively subjected to hot rolling, solid solution treatment, cold rolling and aging treatments. Its microstructure, microhardness and electrical conductivity at different states were systematically investigated. The as-cast microstructure consists of three phases: Cu matrix, Cr and Cu5 Zr. Zr is completely dissolved into the matrix while partial Cr remains after the solid solution treatment. Aging of the cold-rolled sample makes nanocrystals of Cr and Cu5 Zr precipitate from the matrix, and the microhardness and electrical conductivity rise. A combination of high microhardness(HV 186) and high conductivity(81% IACS) can be obtained by aging the sample at 773 K for 60 min. As the aging temperature increases, the orientation degree of the Cu crystals gradually decreases to zero, but the microstrain in them cannot be eliminated completely owing to the presence of precipitates and dislocations. The Cr precipitates exhibit the N-W orientation relationship with the matrix when the coherence strengthening mechanism plays a main role. 展开更多
关键词 Cu-Cr-Zr-RE alloy ROLLING aging treatment microstructure properties
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Effect of heat treatment on microstructure and mechanical property of Ti-steel explosive-rolling clad plate 被引量:14
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作者 江海涛 阎晓倩 +1 位作者 刘继雄 段晓鸽 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第3期697-704,共8页
The effect of heat treatment on microstructure and mechanical properties of the Ti-steel explosive-rolling clad plate was elaborated by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffracti... The effect of heat treatment on microstructure and mechanical properties of the Ti-steel explosive-rolling clad plate was elaborated by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), micro-hardness test and shear test. The composites were subjected to heat treatment at temperature of 650-950 ~C for 60 min. The results show that the heat treatment process results in a great enhancement of diffusion and microstructural transformation. The shear strength decreases as the treatment temperature increases. Heated at 850 ℃ or below, their shear strength decreases slowly as a result of the formation of TiC in the diffusion interaction layer; while at the temperature of 850 ℃ or above, the shear strength decreases obviously, which is the consequence of a large amount of Ti-Fe intermetaUics (Fe2Ti/FeTi) along with some TiC distributing continuously at diffusion reaction layer. 展开更多
关键词 Ti-steel explosive-rolling clad plate heat treatment DIFFUSION mechanical properties
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