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B级钢_Q450NQR1钢焊接接头组织与力学性能.pdf

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上半月出版 · · 金属铸锻焊技术 Casting Forging Welding B 级钢/Q450NQR1 钢焊接接头组织与力学性能 1 1 2 胡飞 , 谭文一 , 张锋刚 (1.大连交通大学材料科学与工程学院,辽宁大连 116028; 2. 大连理工大学材料学院,辽宁大连 116026) 摘 要:通过拉伸、弯曲、冲击、硬度试验以及金相分析等方法,研究了 级钢 钢焊接接头组织与力学 B /Q450NQR1 性能。 结果表明:接头抗拉强度优于母材 级钢,弯曲性能良好; 级钢侧 冲击值较低;焊缝组织为先共析铁素 B B HAZ 体 针状铁素体, 级钢侧 为铁素体 网状珠光体,晶粒粗大。 + B HAZ + 关键词: 级钢; 焊;焊接接头组织;力学性能 B MAG 中图分类号: 文献标识码: 文章编号: TG457.1 A 1001-3814(2010)01-0119-03 Microstructure and Mechanical Properties of Welded Joints of B-grade Steel/Q450NQR1 Steel 1 1 2 HU Fei , TAN Wenyi , ZHANG Fenggang (1. School of Material Science and Engineering,Dalian Jiaotong University, Dalian 116028, China; 2. School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China) Abstract : Microstructure and mechanical properties for the welded joints of B-grade steel and Q450NQR1 steel were researched by tensile, flexural, impact, hardness tests and metallographic. The results show that joint tensile strength of the two steel is better than that of B-grade steel materials, and the ben
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