9SiCr钢的电火花表面强化工艺研究  

Research on Electric Spark Surface Strength Process for 9SiCr Steel

作　　者：方琴[1,2] 万时旺[2] 陈庚[1,2] 张崇才[2,3] 王正云[2] 

机构地区：[1]四川工程职业技术学院材料工程系,四川德阳618000 [2]西华大学材料科学与工程学院,四川成都610039 [3]重庆文理学院交叉学科研究中心,重庆402160

出　　处：《铸造技术》2017年第5期1054-1057,共4页Foundry Technology

基　　金：四川省教育厅基金资助项目(16ZB0156)

摘　　要：对9SiCr钢进行了电火花表面强化处理,研究了不同的电容量和比强化时间对9SiCr钢表面强化层厚度、显微硬度和表面粗糙度的影响。结果表明:分别在比强化时间不变、电容量从30μF提高到300μF和电容量维持不变、比强化时间由1 min·cm^(-2)升至5 min·cm^(-2)的过程中,表面强化层厚度和显微硬度均表现出先升后降的变化规律,而表面粗糙度表现为持续增大。当选用电容量为240μF、比强化时间3 min·cm-2时,9SiCr钢的表面强化层获得了最佳综合性能,厚度和显微硬度值分别为50.2μm和1 411 HV。The electric spark surface strength process was used to treat 9SiCr steel, and the effects of different capacities and strength time ratio on the thickness, micro hardness and surface roughness of the surface strength layer were studied.The results show that, when the strength time ratio is constant and the capacity increases from 30 μF to 300 μF, the thickness and micro hardness of the surface strength layer have the same tendency ＂first rise and then drop＂, and the surface toughness increases all the time. The thickness, micro hardness and surface toughness have the same tendency when the capacity is constant and the strength time ratio increases from 1 min·cm-2to 5 min·cm-2. When the capacity is 240 μF and the strength time ratio is 3 min·cm-2, the best combination properties are obtained, and the values of thickness and micro hardness are 50.2 μm and 1 411 HV, respectively.

关 键 词：电火花强化 9SiCr 强化层厚度 硬度 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]