高频焊接钢管工艺参数的研究.pdf

上半月出版 · · 金属铸锻焊技术 Casting Forging Welding 高频焊接钢管工艺参数的研究 陈霞，周家林，常庆明，汪姣 （武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室，湖北武汉430081 ） 摘 要：为了提高冷弯钢管焊接质量，采用不同工艺参数对其进行焊接，用金相、扫描电镜及硬度测试、冲击、 冷弯和拉伸等方法研究了其焊接钢管的组织及力学性能。 结果表明，焊缝区域没有裂纹、气孔等缺陷。 试样焊缝中 心组织为魏氏组织，热影响区的组织是魏氏组织、珠光体和先共析铁素体，母材为珠光体和铁素体。 试样焊缝处的 表面布氏硬度最高，热影响区居中，而母材最低。 焊缝组织粗大，硬度最高，韧性最低。 试样弯曲角随面能量呈山型 变化趋势，只有面能量处于最佳值时，焊缝力学性能最佳。 关键词： 焊接；组织；性能；钢管 开口角 ; 中图分类号： 文献标识码： 文章编号： TG458 A 1001-3814 2009 01-0005-03 Research on Welding Parameters For High-frequency Welding Pipe CHEN Xia, ZHOU Jialin, CHANG, Qingming, WANG Jiao Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education; Wuhan University of Science and Technology, Wuhan 430081, China Abstract ： The cold-bending steel pipe was welded with different technology parameters in order to improve the quality of steel pipe. By means of metallographic examination, scanning electron microscope examination, hardness test, impact test, bend test, tensile test and so on, the microstructure and mechanical properties of steel pipe were investigated. The results show that some welding defects such as crack and blowholes are not found. The microstructure of the weld is widmanstatten microstructure; the microstructure of heat affected zone is widmanstatten microstructure, pearlite and proeutectoid ferrite, the base metal is pearlite and ferrite microstructure. The metal brinell hardness is the highest in the weld, the seconds is in the heat affected zone, the third is in the base met