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我们自制的龙门剪板机的上剪背(图1)上的钢板和方钢原规定用 A3钢,而方钢错用为焊接性能较差的45Mn2合金结构钢,因此存在异种钢焊接问题。
Our self-made gantry shears on the shear back (Figure 1) on the steel and the original provisions of the square steel with A3 steel, and square steel used for poor welding performance of 45Mn2 alloy steel, so there are dissimilar steel welding problems.