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铸铁是含碳量大于2％的铁碳合金,另外还含有一定数量的 si、Mn、s、P 等元素。由于铸铁具有成本低、易铸造和易切削加工等特点,所以在汽车、机床等行业使用较为广泛。但是,这种材料的补焊却比较困难。在铸铁补焊时,接头易产生白口及淬硬组织,裂纹、气孔等缺陷;另外还有补焊区与母材颜色相同等要求。因此,铸铁的补焊工艺是多样的。讨论铸铁中用量最大的灰口铸铁的补焊工艺,能更好地揭示铸铁补焊的实质,以便
Cast iron is an iron-carbon alloy containing more than 2% carbon, in addition to a certain amount of elements such as si, Mn, s and P. As cast iron with low cost, easy casting and cutting characteristics, it is widely used in automobile, machine tool and other industries. However, the material of the welding is more difficult. In the cast iron welding, the joints are easy to produce white and hardened tissue, cracks, porosity and other defects; In addition, there are the same welding area and base metal color requirements. Therefore, the repair welding of cast iron is varied. Discussion Casting iron in the largest amount of gray cast iron welding process, can better reveal the essence of cast iron welding, so that