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我矿采用结422低碳钢焊条焊补了空气压缩机外壳、柴油机外壳、水泵外壳、电动机端盖等裂缝。上述铸件缺陷经焊补后,质量都很好。有的设备运转7、8年也无任何异常现象,现将焊补方法介绍如下。供有关单位参考。一、焊前准备 1.将铸件缺陷部位的油、锈、漆、铁渣、残留型砂等氧化物清除干净,直至露出金属光泽,清除范围应不小于坡口边缘5毫米。 2、根据焊件厚度不同,用錾子把缺陷处开出V型或X型坡口。坡口角度
Mine mine using knot 422 low carbon steel welding rod to make up the air compressor shell, diesel engine shell, pump housing, motor cover and other cracks. The castings defects by welding, the quality is good. Some equipment operation 7, 8 years without any abnormal phenomenon, welding repair methods are introduced below. For the relevant units for reference. First, the preparation before welding 1 casting parts of the defects of oil, rust, paint, iron slag, residual sand and other oxides removed until the clear metallic luster, clearance should be not less than 5 mm edge of the groove. 2, according to the different thickness of the weldment, with prickly heat out of the V-shaped or X groove. Bevel angle