焊接参数对厚钢板焊接接头力学性能的影响研究

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Abstract：To improve the welding quality of thick steel plates in stee structure buildings，a study was conducted on the influence of pulse tungsten inert gas welding process parameters on the mechanical properties of 25mm thick steel plate welded joints. This study focuses on a 25mm thick O5CuPCrNi weathering steel plate specimen and investigates its effects from fouraspects： pulse frequency， welding current， welding speed，and duty cycle.The test results show that when the pulse frequency is 1Hz ，the welding current is 2OoA，the welding speed is 450mm/min and the duty cycle is 50% ，the mechanical indicators of the welded joint reach the optimal level， and the application effect is better.

Keywords： 25mm thick steel plate;welded joint; pulse frequency; tensile strength; elongation

1序言

在建筑钢结构领域中，厚钢板通常是指厚度超过 20mm 的钢板，其接头焊接质量是保证整体钢结构稳定性与安全性的关键因素。（剩余5080字）