铜砷共存时砷含量对钢的高温氧化行为与热裂性的影响  

Effect of arsenic content on high temperature oxidation behavior and hot cracking of steel containing copper and arsenic

作　　者：孟庆阳 辛文彬[1] 张婧[1] 梁雨雨 姜银举[1] 邓永春[1] MENG Qing-yang;XIN Wen-bin;ZHANG Jing;LIANG Yu-yu;JIANG Yin-ju;DENG Yong-chun(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《材料热处理学报》2021年第10期77-86,共10页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51804170);内蒙古自然科学基金(2018LH05014)。

摘　　要：采用热重分析仪、扫描电镜(SEM)和Gleeble模拟热压缩试验等研究了铜砷共存时砷含量对含0.22 mass%Cu钢的高温氧化行为(1000~1150℃)及热裂性的影响。结果表明:当氧化温度低于1100℃时,试验钢的氧化动力学先服从线性规律,后服从抛物线规律;当温度高于1100℃时,氧化后期脱离抛物线规律。随砷含量的增加,试验钢的抛物线阶段的氧化速率常数KP和氧化增质量增加,氧化激活能降低。砷含量越多,试验钢的氧化层总厚度越厚。钢中砷元素的加入量越多,向基体渗透的富铜液相量越大,钢在热加工过程中的表面热裂倾向性越大,并且富铜液相量和钢表面热裂倾向性在1050℃时达到最大。Effect of arsenic content on high temperature oxidation behavior(1000-1150℃)and hot cracking of steel containing 0.22 mass%Cu was investigated by thermogravimetric analysis,scanning electron microscopy(SEM)and Gleeble simulated hot compression test.The results show that when the oxidation temperature is lower than 1100℃,the oxidation kinetics of the experimental steel follows the linear law first,and then the parabolic law.When the temperature is higher than 1100℃,the parabolic law will be broken away in the later stage of oxidation.With the increase of arsenic content,the parabolic oxidation rate constant K_(P) and oxidation mass gain of the experimental steel increase,while the oxidation activation energy decreases.The more the arsenic content is,the thicker the total thickness of oxide layer of the experimental steel is.The more the arsenic added into the steel,the greater the amount of copper rich liquid phase that penetrates into the matrix,and the greater the surface hot cracking tendency of the steel during hot working.The amount of copper rich liquid phase and the surface hot cracking tendency of the steel reach the maximum at 1050℃.

关 键 词：高温氧化 氧化动力学 氧化层 富铜相 表面热裂倾向性 

分 类 号：TG142.3[一般工业技术—材料科学与工程]