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用普通鋼焊条和普通鑄鉄焊条冷焊鑄鉄件,焊縫往往会产生白口,不能进行机械加工。因此,在焊补鑄鉄件加工面上的缺陷的时候,一般都采用昂貴的蒙內耳合金焊条、銅鎳鑄鉄焊条和紫銅焊条;这样虽然可以解决焊縫加工的問題,但焊縫的組織和顏色同基本金屬却不一样,鑄件的成本大大增加。我們最近試制成功一种不含有色金屬銅、鎳的焊条;用它冷焊鑄鉄件,焊縫不会产生白口,可以进行机械加工;而且紧密結实,組织和顏色同基本金屬一样,質量完全合格。現在把这种焊条和焊接工艺介紹如下。
With ordinary steel electrodes and ordinary cast welding rod cold welding castings pieces, the weld will often have white, can not be machined. Therefore, when welding defects in the machined surface of castings, expensive Monel alloy electrodes, copper-nickel castings, and copper electrodes are commonly used. Although this solves the problem of weld processing, the microstructure of the weld And the color is not the same with the basic metal, the cost of casting greatly increased. We recently successfully trial a non-ferrous metal copper, nickel electrode; use it cold-cast castings, the weld will not produce white, can be machined; and close and strong, the same organization and color with the same basic metals, Quality is fully qualified. Now introduce the welding rod and welding process as follows.