含铜钢在1150℃高温保温条件下的铜偏聚现象  

Phenonmenon of Cu Segregation in Cu-containing steel During Soaking at 1150℃

作　　者：王雷 董俊华[2] 韩达 梁坚坤 李权 柯伟[4] WANG Lei;DONG Junhua;HAN Da;LIANG Jiankun;LI Quan;KE Wei(School of Life and Health Science,Kaili University,Kaili 556011,China;Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Life Science,Beijing Institute of Technology,Beijing 100000,China;Environmental Corrosion Centre of Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]凯里学院大健康学院,凯里556011 [2]中国科学院金属研究所沈阳材料科学国家研究中心,沈阳110016 [3]北京理工大学生命科学学院,北京100000 [4]中国科学院金属研究所材料环境腐蚀中心,沈阳110016

出　　处：《中国腐蚀与防护学报》2020年第6期545-552,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：凯里学院博士启动项目(BS201814);国家自然科学基金(31760191);贵州省高等学校教学内容和课程体系改革项目(JG202018和2018520134).

摘　　要：研究了在1150℃高温条件下保温处理后含铜钢的铜偏聚现象。在空气中采用不同保温时间进行实验,保温时间不超过60 min。结果表明,由于Fe的氧化及脱碳引起的渗碳体转变数量的减少,共同促使更多的Cu析出并向钢/氧化皮界面附近晶界偏聚,导致在空气中经高温处理后,钢/氧化皮界面及其附近的晶界中都出现了Cu的富集;经过冷却相转变后,钢/氧化皮界面附近区域钢中的Cu含量低于高温处理前的Cu含量。The Cu segregation in Cu-containing steel was investigated after high temperature treatment at 1150℃in air for different time.It is found that Cu segregation occurred both at the interface oxide scale/steel matrix and at grain boundaries of the sub-surface of the substrate beneath the interface,which was caused by the preferential oxidation of Fe and the decarburization,thereby resulted in the sharply decrease of the cementite content near the steel surface.It also found that the Cu content in the area beneath the interface oxide scale/steel matrix for the heat treated steel is lower than that of the steel before subjecting to heat treatment.

关 键 词：含铜钢 高温处理 铜偏聚 脱碳 

分 类 号：TG142[一般工业技术—材料科学与工程]