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  • pp管高强钢焊接技术工艺线能量即热输入的控制

      pp管高强钢焊接技术工艺线能量即热输入的控制,线能量即热输入的控制是高强钢焊接的重难点,也是获得无缺陷、性能优良焊缝的关键之一。线能量过小,冷却速度快,焊缝和热影响区容易出现淬硬组织,也不利于氢逸出,冷裂纹倾向性大,线能量过大,热影响区宽,过热区晶粒粗大,冷却速度慢,增大,焊缝和热影响区生成上贝氏体加M—A组元的脆性组织或魏氏体组织而脆化。所以应优化选择线能量,在确定合适线能量的基础上考虑减少飞溅,防止夹渣、气孔、未熔合等方面而选择合适的电流、电压、速度等工艺参数。

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    来源:pp管高强钢焊接技术工艺线能量即热输入的控制