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铸铁件产生缺陷或损坏后,修补方法很多。而氧乙炔焰热喷焊修复比其他一些修补方法具有下述优点: 1.喷焊设备简单,操作方便灵活,一般焊接维修人员易于掌握; 2.铸件预热温度低,仅250～300℃,对局部修复的工件不需要整体预热,喷焊温度局部在1000℃左右,不易产生热变形,可在现场修补; 3.喷涂层与工件基体之间产生分子互相扩散的冶金结合层,具有较高的结合强度; 4.喷涂层组织致密无孔,成型平整光洁,表面加工余量少;
Cast iron pieces have defects or damage, a lot of repair methods. The oxyacetylene flame spray welding repair than some other repair methods have the following advantages: 1. Spray welding equipment is simple, convenient and flexible operation, the general welding maintenance personnel easy to grasp; 2. Casting preheat temperature is low, only 250 ~ 300 ℃, The partial repair of the workpiece does not require the overall preheating, spray temperature locally at about 1000 ℃, not easy to produce thermal deformation, repairs in the field; 3. Sprayed layer and the substrate matrix between the molecular diffusion of metallurgical bonding layer, with more High bonding strength; 4. Sprayed layer of dense tissue without holes, forming a smooth, less surface processing margin;