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焊补灰口铸铁的方法是多种多样的,用气焊法虽为古老,劳动条件较差,生产效率较低,但由于设备简单,取材容易,质量较好,且气焊火焰的温度比电弧的温度低而分散,加热工件时面积较大,升温缓慢而均匀,使焊补处的温度与邻近的温度差小,焊后能缓慢冷却,因此对防止焊后产生冷硬化及裂缝都有利。故在一般生产单位,对焊后要求机械加工的铸件应用气焊焊补还是比较普遍的。
Although the method of welding gray iron cast iron is varied, the gas welding method is old, the working conditions are poor and the production efficiency is low. However, due to the simple equipment, easy drawing and good quality, and the temperature of gas welding flame is higher than that of arc Low temperature and dispersion, heating the workpiece larger, slowly warming and uniform, so that welding temperature and adjacent temperature difference is small, can be slowly cooled after welding, so to prevent cold hardening after welding and cracks are beneficial. Therefore, in general production units, after the welding requirements of machined castings gas welding welding repair or more common.