大连化工厂在几年的设备检修和抢修中,经反复试验研究和不断改进,创出一种铸铁冷焊法,即镍基焊条电焊法。该厂用这种方法修复了裂纹有4米多长的1Γ压缩机机身(机身有5处大裂纹,焊道总长4250毫米,最厚处有100毫米,开裂宽度为40～100毫米);此外 Dalian Chemical Plant in several years of equipment maintenance and repair, after repeated experimental study and continuous improvement, creating a cast iron cold welding method, that is, nickel-based welding electrode welding method. The plant used this method to repair cracks in a 4-meter-long 1Γ compressor fuselage (fuselage has five large cracks, weld length 4250 mm, the thickest at 100 mm, cracking width of 40 to 100 mm) In addition