摘要
研究了常规双级时效处理工艺(先低温160℃,后高温200℃)和反双级时效处理工艺(先高温200℃,后低温160℃)对低压砂型铸造Mg-3Nd-0.2Zn-Zr(NZ30K)(wt.%)镁合金的硬度和室温拉伸性能的影响。结果表明,常规双级时效处理对提高NZ30K合金的屈服强度效果不明显,而反双级时效处理能明显提高NZ30K合金的屈服强度。经200℃×16 h+160℃×64 h反双级时效处理后,NZ30K合金获得最佳综合力学性能,硬度和屈服强度分别为75.7 HV和161 MPa。
Conventional two-step aging(CTSA)treatment(first step aging at 160℃and then secondary step aging at 200℃)and Reverse two-step aging(RTSA)treatment(first step aging at 200℃and then secondary step aging at 160℃)were applied in low pressure sand cast(LPSC)Mg-3Nd-0.2Zn-Zr(NZ30K)(wt.%)alloys,and influence of aging treatment on the hardness and tensile properties of NZ30K alloy were studied.It was found that CTSA treatment had no more effect to enhance the yield strength than the single-step aging(SSA)treatment(160℃and 200℃,respectively),while the RTSA treatment can improve the yield strength obviously.NZ30K magnesium exhibits the desirable comprehensive mechanical properties after RTSA treatment of 200℃×16 h+160℃×64 h,where the hardness and the yield strength are 75.7 HV and 161 MPa,respectively.
作者
岳海燕
付彭怀
胡斌
李贞明
王迎新
彭立明
Anil KSachdev
YUE Haiyan;FU Penghuai;HU Bin;LI Zhenming;WANG Yingxin;PENG Liming;Anil KSachdev(Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 200436,China;National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China;GM China Science Lab,Shanghai 201206,China;Suzhou Institute for Nonferrous Metals Research Co.,Ltd.,Suzhou 215026,China;General Motors Research&Development Center,Warren,MI 48090,USA)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2020年第4期517-524,共8页
Journal of Materials Science and Engineering
基金
supported by the SJTU-GM Collaborative Research Laboratory Jointly Established by General Motors Global Research and Development(GM R&D)
Research was Supported by National Key Research and Development Program of China(2016YFB0301000)
Shanghai Rising-Star Program(15QB1402700)
National Natural Science Foundation of China(NSFC)(51671128&51771113)
Special Fund of Jiangsu Province(BA2016039).
