碳含量及合金元素对低温盐浴渗铬层的影响  

Effects of Carbon Content and Alloying Elements on Low Temperature Salt-bath Chromizing

作　　者：叶金玲[1] 叶峰[2] 

机构地区：[1]广东水利电力职业技术学院机械工程系,广东广州510635 [2]华南理工大学机械与汽车工程学院,广东广州510641

出　　处：《铸造技术》2012年第6期664-666,共3页Foundry Technology

摘　　要：以45钢、T10钢及3Cr2W8V钢为例,使用OM、SEM等方法,研究了碳以及合金元素含量对低温盐浴渗铬层的影响。结果表明,钢的碳含量在低温盐浴渗铬过程中起到了促进作用,能增加渗铬层的深度,提高渗层的显微硬度和铬浓度,T10钢表面铬浓度为85.4%,45钢为81.3%,T10钢表面硬度为1 380 HV,45钢为1 290 HV;而合金元素则起到了阻碍作用,减少了渗铬层的深度,渗层的显微硬度和铬浓度均有所下降,3Cr2W8V钢表面硬度为1 280 HV,表面铬浓度为76.3%。The effect of carbon content and alloying element on the microstructure, phase structure, white layer thickness and chromium concentration, microhardness of the chromized layer by low temperature salt-bath chromizing were investigated by means of optical microscopy （OM）, scanning electron microscopy （SEM）. The results show that the strong carbide elements hinder the diffusion of chromium and carbon, the white layer thickness and microhardness, surface chromium concentration of the chromized layer are reduced. But carbon＇content promotes the progression of the salt-bath chromizing, increases the depth of chromizing layer, improves the hardness and the chromium concentration of chromizing layer. T10 steel surface chromium concentration can reach 85.4%, 45 steel reach 81.3%, and the surface hardness is T10 steel 1 380 HV, 45 steel 1 290 HV.

关 键 词：低温盐浴渗铬 碳含量 合金元素 

分 类 号：TG156.88[金属学及工艺—热处理]