|关键词: 焊接接头 力学性能 金相组织
|Microstructure and mechanical properties of welded joint of VM12 and SA-213TP347H dissimilar steels
Chen Zhaoyu1, Wang Ping2, Diao Wangzhan2
|In this paper, VM12 martensitic steel and SA-213TP347H austenite stainless steel have welded by tungsten inert gas process and AWS ERNiCr-3 bare welding rods have used. Microstructure and mechanical properties of the dissimilar welded joint have been investigated with optical microscope and by various mechanical property tests. The results indicated that the weld was comprised of austenite and ferrite. Mechanical property test results confirmed good tensile strength, ductility and impact property of the welded joint. There was a big difference of hardness between VM12-HAZ and weld, which may reduce ductility of the joint and generate some defects after long-time servicing.
|Key words: welded joint mechanical property microstructure