摘要
为提高Q235普通碳素结构钢的耐磨性能和耐腐蚀性能,采用CO_(2)气体保护焊在其表面堆焊药芯焊丝,利用蔡司高级金相显微镜、显微硬度测试仪、摩擦磨损试验机和电化学工作站等分析测试手段,研究不同焊接电流下的堆焊层的宏观形貌、显微组织、显微硬度、摩擦磨损性及耐腐蚀性。测试结果表明,当焊接电流为200 A时,堆焊层组织均匀,碳化物均匀弥散分布在组织内部,其显微硬度最高为500 HV,耐磨性能最好,磨损失重量为26 mg,磨损机理为磨粒磨损;当焊接电流为230 A时,热输入量最高,合金元素固溶于奥氏体基体的量增多,使其稳定性增加,从而提高了耐腐蚀性。
In order to improve the wear resistance and corrosion resistance of Q235 plain carbon structural steel, the flux cored wire was deposited on the surface of Q235 plain carbon structural steel by CO_(2)gas metal arc welding technology, the macro-morphology, microstructure, micro-hardness, friction and wear resistance and corrosion resistance of the surfacing layer were studied, by using Zeiss’ s advanced metalloscope, micro hardness tester, friction and wear tester, and electrochemical workstation. The results show that when the welding current is 200 A, the microstructure of the surfacing layer is uniform, the carbide is evenly distributed in the microstructure, the microhardness is 500 HV, the wear resistance is the best, the wear loss weight is 26 mg, and the wear mechanism is abrasive wear. When the welding current is 230 A, the heat input is the highest, and the amount of alloy elements dissolved in austenite matrix increases, which increases its stability and corrosion resistance.
作者
张宇鹏
王永东
王金宇
常萌阳
李统广
姚月
张宁
ZHANG Yupeng;WANG Yongdong;WANG Jinyu;CHANG Mengyang;LI Tongguang;YAO Yue;ZHANG Ning(School of Material Science&Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China)
出处
《电焊机》
2022年第4期82-88,共7页
Electric Welding Machine
基金
黑龙江省教育厅基本业务费(2020-KYYWF-0699)
哈尔滨市科技创新人才资助项目(2017RAQXJ010)
研究生创新科研资金项目(YJSC X2021-103HKD)。
关键词
CO
气体保护焊
显微组织
耐磨性
耐蚀性
CO_(2)gas metal arc welding
microstructure
wear resistance
corrosion resistance
