预渗处理对预渗碳20钢盐浴钒铬共渗层结构及性能的影响  

Effect of Pre-treatment on Structure and Properties of Chromium-vanadium Penetrating Layer on Pre-carbided 20 Steel by Molten-salt Bath Technique

作　　者：张进[1] 吴思博[1] 王浩宇[1] 李承洋[1] 向俊[1] 孙才沅 

机构地区：[1]西南石油大学材料科学与工程学院,四川成都610500

出　　处：《热加工工艺》2016年第14期120-123,共4页Hot Working Technology

基　　金：西南石油大学大学生创新创业训练计划资助项目(201410615024);四川省教育厅青年基金(12ZB164);四川省油气田材料教育厅重点实验室开放基金(X151515KCL07)

摘　　要：对20钢基体进行预渗碳和钒铬盐浴渗入复合处理,盐浴渗入处理温度950℃,时间4 h。分析了单一渗钒、铬层和钒铬共渗层的组成。采用球-盘结构测定室温干摩擦性能。结果表明:制备出的钒铬共渗层表面致密,厚度12μm,主要由Cr_7C_3、Cr_(23)C_6及V_4C_(2.67)等物相组成。单一渗铬、钒层和共渗层的显微硬度分别为1740、2004、1885 HV0.03;钒铬共渗层的摩擦系数最小,约0.3066,其减摩性能最好。A duplex surface treatment on 20 steel matrix was developed by involving carbonizing and molten-salt bath technique. The process was performed in molted-salt bath at 950℃ for 4 h. The compositions of vanadium carbide, chromium carbide and chromium-vanadium carbide layer were studied. The dry wear tests were carried out on ball-on-disk configuration. The results indicate that the prepared chromium-vanadium layers exhibit compact morphology. The thickness of the layer is about 12 μm,which is composed ofV4C2.67, Cr7C3 and Cr23C6 phases. The hardness of chromium carbide, vanadium carbide and chromium-vanadium carbide layer is 1740HV0.03, 2004HV0.03 and 1885HV0.03, respectively. The wear coefficient of chromium-vanadium carbide layer is minimum, which is about 0.3066, then the anti-friction property is the best.

关 键 词：钒铬共渗层 盐浴法 摩擦磨损 

分 类 号：TG156.8[金属学及工艺—热处理]