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270锭轧断穿孔的研究
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作者 邓少妍 何洪聪 杨瑞葆 《冶金丛刊》 1995年第3期12-16,共5页
对我厂270锭轧断、穿孔坯取样进行高低倍检验表明,钢锭冷却快或开坯时钢锭加热不均匀、温低、温高热脆都将引起钢锭轧断或穿孔。
关键词 钢锭 加热 轧断 穿孔
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轧断双臂 职工索赔工伤待遇140万 依法裁决 维护劳资双方合法权益
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作者 周新华 《劳动保护》 2001年第12期29-29,共1页
关键词 中国 劳动法 工伤待遇 案例分析 双臂轧断 赔偿数额 劳动事故
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Mechanism of necking defect of 6082 aluminium alloy rolled by cross-wedge rolling method based on material thermal properties 被引量:4
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作者 WANG Dong-gang SHU Xue-dao +1 位作者 WANG Rui XU Sheng 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第12期3721-3732,共12页
Necking defects have long troubled the application of cross-wedge rolling technology in aluminium alloy shaft parts.To accurately predict necking defects,new judgement conditions are established based on the thermal p... Necking defects have long troubled the application of cross-wedge rolling technology in aluminium alloy shaft parts.To accurately predict necking defects,new judgement conditions are established based on the thermal performance of 6082 aluminium alloy.The limit-sectional shrinkage without necking defects is achieved by combining theoretical calculation and finite-element model analysis,which couples heat transfer and deformation.In this paper,a 6082 aluminium alloy extruded rod with a 40 mm diameter rolled at a preheated temperature of 500℃and a rolling angular velocity of 1 rad/s is taken as an example.The simulation and experimental results show that necking defects do not occur on the rolled pieces if the sectional shrinkage is below the limit-sectional shrinkage but will occur when the sectional shrinkage is above it.The results prove that the prediction model of necking defects in cross-wedge rolling of 6082 aluminum alloy is feasible,and this research provides a theoretical basis for the qualified aluminum alloy shafts produced by the cross-wedge rolling. 展开更多
关键词 6082 aluminium alloy cross wedge rolling limit-sectional shrinkage necking mechanism temperature field
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Tensile fracture of as-cast and hot rolled Mg-Zn-Y alloy with long-period stacking phase 被引量:1
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作者 王柏树 熊守美 刘勇兵 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第B07期488-492,共5页
An experimental Mg97Zn1Y2(molar fraction,%)alloy was produced by rolling the as-cast alloy.The microstructure of the alloy is composed of theα-Mg(also marked as 2H-Mg with reference to long-period stacking structure ... An experimental Mg97Zn1Y2(molar fraction,%)alloy was produced by rolling the as-cast alloy.The microstructure of the alloy is composed of theα-Mg(also marked as 2H-Mg with reference to long-period stacking structure according to hexagonal close packed structure)and long-period stacking(LPS)phase.Tensile tests of Mg97Zn1Y2 alloy in comparison with pure Mg were conducted.The fracture morphologies of the tensile specimens were characterized and the microstructures near fracture surface were observed.The results show that the rolled Mg97Zn1Y2 alloy shows a mixed fracture mode including dimples indicating a ductile fracture pattern and a small fraction of cleavage planes indicating a brittle fracture pattern,which is different from the single brittle fracture of the as-cast alloy.In addition,the plastic deformation is mainly from dislocations induced strain with small strengthening effect during plastic deformation in the as-cast Mg97Zn1Y2 alloy,and the strain hardening rate is similar to that of the as-cast pure magnesium.The deformation mechanism of Mg97Zn1Y2 alloy is different from that of the pure magnesium according to a metallographical observation that whether twins are found or not.The strengthening effect hardly exists in the rolled Mg97Zn1Y2 alloy under the same dislocations induced strain,which is different from that of the as-cast alloy with moderate strengthening effect. 展开更多
关键词 magnesium-yttrium-zinc alloy long-period stacking phase rolling mechanical properties fracture
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Effects of interrupted ageing and asymmetric rolling on microstructures, mechanical properties, and intergranular corrosion behavior of Al-Mg-Si-Zn alloy 被引量:2
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作者 TIAN Ai-qin XU Xue-hong +1 位作者 SUN Lin DENG Yun-lai 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第3期821-835,共15页
Effects of interrupted ageing(T6I6) and asymmetric rolling on microstructures, mechanical properties, and intergranular corrosion(IGC) behaviors of Al-Mg-Si-Zn alloy were investigated. Results showed that the T6 alloy... Effects of interrupted ageing(T6I6) and asymmetric rolling on microstructures, mechanical properties, and intergranular corrosion(IGC) behaviors of Al-Mg-Si-Zn alloy were investigated. Results showed that the T6 alloy has the lowest strength and the worst IGC resistance, while the T6I6 alloy has higher strength and better IGC resistance.What’ s more, the alloy treated by pre-rolling deformation has higher strength and better IGC resistance;and the alloy treated by the pre-asymmetry rolling achieves the highest strength, the best IGC resistance and lower elongation. The mechanical properties depend on microstructures such as the grain size, texture, dislocation density and precipitation, the grain boundary misorientation and grain boundary microstructure are responsible for the IGC resistance. 展开更多
关键词 Al-Mg-Si-Zn alloy interrupted ageing asymmetric rolling microstructure mechanical property intergranular corrosion property
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