加热气氛对GCr15轴承钢氧化和脱碳特性的影响  

Effect of Heating Atmosphere on Oxidation and Decarburization Properties of GCr15 Bearing Steel

作　　者：王萍[1] 沈千成 吴旭明 侯清宇[1] WANG Ping;SHEN Qiancheng;WU Xuming;HOU Qingyu(School of Metallurgy,Anhui University of Technology,Maanshan 243000,China)

机构地区：[1]安徽工业大学冶金学院

出　　处：《热加工工艺》2018年第22期78-81,84,共5页Hot Working Technology

摘　　要：为分析GCr15轴承钢在加热条件下的高温氧化行为,采用热重分析法(TGA)研究了在1000~1250℃不同氧流量下保温60min的氧化增重动力学行为,并用采用金相法研究了不同条件下的脱碳行为。结果表明:随着温度的升高(1000~1250℃),单位面积氧化增重逐渐增大。对于不同气氛下的加热实验,氧气含量为1.5L/min情况下的脱碳层深度最小,且在温度为1180℃时,脱碳层深度达到最大。In order to analyze high temperature oxidation behavior of GCr15 bearing steel under heating condition, the oxidation gain kinetics behaviors of GCr15 bearing steel under different oxygen flow rates at 1000-1250 ℃ for 60 min were measured by thermo-gravimetric analysis(TGA). The decarburization behavior under different conditions was studied by metallographic method. The results show that with temperature increasing(1000-1250 ℃), the oxidation mass gain per unit area increases gradually.As for heating experiemnts under different atmospheres, the decarburization depth is the least,when the oxygen content is 1.5 L/min, and then at 1180 ℃, the depth of the decarburized layer is maximum.

关 键 词：温度 氧化 脱碳 气氛 

分 类 号：TG142.72[一般工业技术—材料科学与工程]