QPQ盐浴复合处理时间对304不锈钢耐磨性的影响  

Influences of QPQ salt bath treatment time on wear resistance of 304SS

作　　者：蔡伟[1] 魏国方[1,2] 孟凡娜[1] 胡静[1] 

机构地区：[1]常州大学材料科学与工程学院,常州市先进金属材料高技术研究重点实验室,江苏常州213164 [2]常州市武进广宇热处理有限公司,江苏常州213134

出　　处：《材料热处理学报》2013年第1期153-156,共4页Transactions of Materials and Heat Treatment

基　　金：常州市科技支撑项目(CE20110098);江苏省研究生创新基金项目(SCZ100431322)

摘　　要：利用光学显微镜、X射线衍射仪、显微硬度计、摩擦磨损试验机研究了304不锈钢在565℃进行60～180 min盐浴复合处理(QPQ)后对304不锈钢表面组织和耐磨性性能的影响。结果表明,在565℃渗氮时间为150 min时,304不锈钢硬度峰值约为1200 HV,比基体高5倍以上。工件经QPQ工艺处理后试样钢渗层结构由表及里为致密的氧化膜、渗氮层和扩散层,其中渗氮层主要物相为ε-Fe2～3N。耐磨性实验表明,QPQ处理可显著改善304不锈钢耐磨性。在565℃渗氮时间150 min为改善耐磨性的最佳时间,处理后试样的耐磨性比原始试样提高10倍左右。304 stainless steel was treated by QPQ process at 565 ℃ for different time, The effect of QPQ treatment duration on microstructure, hardness and wear resistance of the steel were investigated by optical microscope, X-ray diffraction, microhardness and wear tests. The results show that the maximum micro-hardness of 1200 HV0. 01 is obtained for the steel nitrided at 565 ℃ for 150 min, which is 5 times higher than that of untreated sample. The nitrided layer of 304SS after QPQ salt-bath treatment is composed of a very thin film of oxide layer, compound layer and diffusion zone. The main phase of compound layer is 8-Fe2-33N. The wear resistance of 304SS is significantly improved by QPQ treatment, and the best wear resistance is observed for 304SS after nitriding at 565 ℃ for 150 rain, which is 10 times higher than that of untreated sample.

关 键 词：QPQ工艺 304不锈钢 耐磨性 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG156.8[金属学及工艺—金属材料]