Study on laser welding technology of 65Mn steel in continuous pickling production line
In this paper,the process equipment and characteristics of solid laser welding machine in continuous pick-ling production line are introduced,and the welding performance of 65Mn steel is deeply studied.65Mn steel and SPHC steel were butt welded by 10 kW solid-state laser,and different welding processes and heat treatment schemes were studied.The plastic deformation capacity of welded joints under different heat treatment processes was evaluated by cup bulge test.The weld and heat affected zone were analyzed by metallographic microscope.The hardness of weld and heat affected zone(HAZ)was tested by microhardness tester,and the relationship between the microstructure of weld and heat affected zone and their plastic deformation ability was discussed.The influence of different welding processes and heat treatment schemes on welding quality is obtained,which provides a useful reference for continuous pickling production of 65Mn steel.
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维普
