摘要
对激光选区熔化(SLM)制备的316L奥氏体不锈钢试样进行热处理,选用MFT-R4000摩蚀磨损试验机、显微硬度测量分析系统和光学显微镜(OM)观察316L不锈钢耐磨性、硬度与磨痕宽度。结果表明:Z向随着退火温度升高,试样硬度均呈下降趋势,SLM试样与880℃热处理后试样硬度相差较小,Y向硬度影响较小。载荷增大,磨痕宽度随之增加,在摩擦过程中存在氧化磨损、黏着磨损及磨粒磨损,磨痕表面存在裂纹,退火后裂纹减少且在880℃时磨痕表面较平滑,质量较优。在一定范围内,载荷对摩擦因数有一定的影响,载荷增大,磨损热升高,氧化膜生成,摩擦因数减小,磨屑为塑性犁削;载荷大于20 N时,摩擦因数上升,磨屑为脆性剥落。
The specimens of 316 L austenitic stainless steel prepared by selective laser melting(SLM) were heat-treated,and the wear resistance,hardness and abrasion width of 316 L stainless steel were observed by using the MFT-R4000 abrasion and wear tester,microhardness measurement and analysis system and optical microscope(OM).The results show that:with the annealing temperature increases,the hardness of the specimen are decreasing in the Z direction;the hardness difference of SLM specimens and specimens after 880 ℃ heat treatment is small;Y direction hardness difference is small.As the load increases,the width of the abrasion marks increases,and oxidation wear,adhesive wear and abrasive wear exist in the friction process,while cracks exist on the surface of the abrasion marks.In a certain range of load,load has a certain influence on the friction coefficient.With the load increases,the wear heat rises,the oxide film is generated,the friction coefficient decreases,and the grinding chip is plastic plowing.When the load is greater than 20 N,the friction coefficient rises,and the grinding chip is brittle flaking.
作者
宗学文
闫丹
刘文杰
张佳亮
高倩
王小丽
Zong Xuewen;Yan Dan;Liu Wenjie;Zhang Jialiang;Gao Qian;Wang Xiaoli(Xi′an University of Science and Technology,Shaanxi710054,China;Xi′an Shangu Power Co.,Ltd.,Shaanxi 710075,China;Xi′an Jiaotong University City College,Xi′an,Shaanxi 710018,China)
出处
《应用激光》
CSCD
北大核心
2022年第1期31-35,共5页
Applied Laser
基金
国家自然科学基金资助(51875452,51804251)。
关键词
激光选区熔化
316L不锈钢
热处理
耐磨性
硬度
selective laser melting
316L stainless steel
heat treatment
wear resistance
hardness
作者简介
宗学文(1964-),男,博士,副教授。研究方向:3D打印快速铸造。E-mail:zongw007@xust.edu.cn。
