应用激光, 2019, 39 (4): 660, 网络出版: 2019-10-12
经SLM打印成型的18Ni300热处理研究
Study on Heat Treatment of 18Ni300 Formed by SLM Printing
模具钢 激光选区熔融 去应力退火 固溶处理 时效处理 die steel laser selective melting stress relief annealing solution treatment aging treatment
摘要
通过选取激光熔化(SLM)技术打印制备18Ni300试样, 采取不同的热处理工艺和冷却方式进行热处理研究, 通过拉伸试验、洛氏硬度及金相显微等性能检测, 可得知不同热处理后的材料力学性能, 其中经去应力退火550 ℃+固溶处理820 ℃+时效490 ℃热处理后得到金相组织为细小的板状马氏体, 硬度可达54 HRC, 抗拉强度达1 800 MPa, 具有良好的综合力学性能, 可对SLM打印金属零件热处理提供参考。
Abstract
In this paper, 18Ni300 samples were prepared by laser melting (SLM) technology. The heat treatment was studied by different heat treatment processes and cooling methods. The mechanical properties of the materials after different heat treatment were obtained by tensile test, Rockwell hardness and metallographic examination. Among them, 550 samples were annealed by stress-free annealing. After heat treatment at 820 + ageing 490, the metallographic structure is fine plate martensite with hardness up to 54HRC and tensile strength up to 1800 MPa. It has good comprehensive mechanical properties. This paper can provide reference for heat treatment of SLM printed metal parts.
张璐, 巩建强, 杜文强, 张兴兴, 李志勇. 经SLM打印成型的18Ni300热处理研究[J]. 应用激光, 2019, 39(4): 660. Zhang Lu, Gong Jianqiang, Du Wenqiang, Zhang Xingxing, Li Zhiyong. Study on Heat Treatment of 18Ni300 Formed by SLM Printing[J]. APPLIED LASER, 2019, 39(4): 660.