脉冲激光工艺参数对M170P/DC06差厚拼焊接头组织与性能的影响

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Abstract： This study investigates the effects of pulse frequency，width，and voltage onthe microstructure and mechanical properties of M170P/DC06 stel differential thickness plates welded joints using an SW-50o Nd：YAG pulsed laser.Results indicate that the DCO6 steel thin plate HAZ exhibitscoarse blocky ferite，whilethe M170P steel thick plate HAZconsistsoffine ferriteand granular bainite.Optimal hardness（2OoHV）is achieved at 20Hz pulse frequency and 300mm/min welding speed，with a gradient decrease from thick to thin plate.

Keywords：pulse laser; differential thickness plate;welding joints;microstructure

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随着工业化的发展，汽车的轻量化设计与性能优化已成为关键发展方向。（剩余6513字）