LD钢TD盐浴渗钒组织和性能研究  

Study on Microstructure and Properties of LD Steel by TD Salt-bath Vanadizing

作　　者：万伟[1] 罗军明[1] 黄俊[1] 

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《热加工工艺》2016年第16期145-148,共4页Hot Working Technology

基　　金：江西省铜钨新材料重点实验室项目(2011-TW-08);江西省科技攻关项目(2011BBE50010)

摘　　要：通过TD盐浴渗钒处理在LD钢表面制备渗钒层。利用扫描电子显微镜、能谱仪、X射线衍射仪对渗钒层组织成分进行检测。结果表明:经TD盐浴渗钒处理后,在LD钢表面获得较为均匀致密的渗钒层,覆层与基体为冶金结合。950℃时,覆层厚度和硬度随时间增长而增加;8 h覆层厚度约为6.1μm,显微硬度值约为1975 HV0.025。覆层主要由无序VCx相组成。LD钢在950℃碳化钒覆层生长动力学近似遵循ln=Dt(n>2)方程。The vanadizing layer was prepared on surface of LD steel by TD salt-bath treatment. The microstmcture and composition of the vanadizing layer were tested by scanning electron microscopy （SEM）, energy disperse spectroscopy （EDS） and X-ray diffractometer. The results show that an uniform and compact vanadizing layer is formed on the surface of LD steel after TD salt-bath vanadizing treatment. The layer and the substmte is metallurgical bonding. Thickness and hardness of the layer increase with the increas of treating time at 950 ℃. The thickness and the micro-hardness of the layer at 950＂C for 8 h are approximately 6.1μm and 1975 HV0.025 respectively. The layer is mainly composed of disordered VCx phase. The growth kinetics of the vanadizing layer on LD steel follows the equation of l^n=Dt（n〉2） at 950℃.

关 键 词：LD 钢 TD 盐浴渗钒 组织和性能 生长动力学 

分 类 号：TG156.8[金属学及工艺—热处理]