选区激光熔化成形M300马氏体时效钢的性能优化  

Performance optimization of maraging steel M300 formed by selective laser melting

作　　者：陈雷 周菲 张亮[3,4] 吴日铭 Chen Lei;Zhou Fei;Zhang Liang;Wu Riming(School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Shanghai Collaborative Innovation Center of Laser Advanced Manufacturing Technology,Shanghai 201620,China;Shanghai Research Institute of Materials,Shanghai 201100,China;Shanghai Engineering Research Center of 3D Printing Materials,Shanghai 201100,China)

机构地区：[1]上海工程技术大学材料工程学院,上海201620 [2]上海市激光先进制造技术协同创新中心,上海201620 [3]上海材料研究所,上海201100 [4]上海3D打印材料工程技术研究中心,上海201100

出　　处：《金属热处理》2019年第12期136-139,共4页Heat Treatment of Metals

基　　金：3D打印18Ni300组织性能优化(cs1805004);上海工程技术大学校科研启动项目(2017-28)

摘　　要：通过固溶时效处理对选区激光熔化成形的M300马氏体时效钢进行性能优化。结果发现,经过820℃×1 h+500℃×4 h的热处理后,M300钢的硬度为587.7 HV0.2,提高约68%;抗拉强度为1820 MPa,提高约72%,断后伸长率为4%,并未随着强度的增加而显著下降,断口为典型的韧窝状形貌。Solution and aging treatment was used to optimize the performance of maraging steel M300 formed by selective laser melting.The results show that the hardness of M300 steel is 587.7 HV0.2,the tensile strength is 1820 MPa,after solution at 820℃for 1 h and then aging at 500℃for 4 h.Compared with the original state(before heat treatment),both hardness and strength increase by 68%and 72%,respectively.But the elongation is retained at 4%,which does not decrease obviously with the increase of strength,and the tensile fracture presents typical morphologies of dimple.

关 键 词：选区激光熔化(SLM) M300马氏体时效钢 热处理 力学性能 

分 类 号：TB31[一般工业技术—材料科学与工程]