目前,一些企业利用二氧化碳气体在高温下具有一定氧化性和含氢量低的特点,在施焊时将铸铁熔池中的碳部分烧损,使焊缝中间得到低碳钢组织。这种突破传统焊接工艺的新方法,能有效地避免铸铁焊接产生白口、裂纹,同时降低焊接成本,提高焊接效率。一、铸铁件修复的基本要求铸铁在工业中的应用十分广泛,但由于铸造工艺的特点,铸铁往往存在着夹沙、裂纹等不同程度的缺陷,对损坏的铸铁件进行补焊是常用方法之一。铸铁件的修复有多种途径和方法,已被广泛应用的有 At present, some companies use carbon dioxide gas at high temperatures with a certain degree of oxidation and low hydrogen content in the cast iron cast iron bath when the carbon part of the burn, the middle of the weld to be low-carbon steel tissue. This new method of breaking through the traditional welding process can effectively avoid white cast iron welding, cracking, while reducing welding costs, improve welding efficiency. First, the basic requirements of iron casting repair Cast iron in the industry is widely used, but due to the characteristics of the casting process, cast iron often there are sand, cracks and other varying degrees of defects on the damaged cast iron welding is the common method one. Cast iron repair a variety of ways and methods have been widely used