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铁镍基合金Incoloy825在焊接时容易出现热裂纹和气孔等缺陷;当在容器制造中受到不正确的加热(中温敏化)后,使用在某些介质中可能产生晶间腐蚀。缺陷的产生与原材料和焊接工艺有直接关系。在原材料方面应控制母材的化学成分和选择合适的焊材;在焊接工艺方面,焊前应保证母材和焊材干净,焊接过程中高温熔池和焊缝应得到有效保护,控制焊接参数,减小线能量,减少焊接接头在中温的停留时间。
Iron-nickel alloy Incoloy825 is prone to defects such as hot cracks and pores during welding. When used in some cases, intergranular corrosion may occur when it is subjected to improper heating (temperature sensitization) in container manufacture. Defects and raw materials and welding process has a direct relationship. In terms of raw materials should control the chemical composition of the base metal and select the appropriate welding consumables; in the welding process, the base metal and welding consumables should be clean before welding, high temperature weld pool and weld during welding should be effectively protected, control welding parameters , Reduce the line energy, reduce the welding joint in the temperature of residence time.