随着采煤、挖掘和运输机械化的发展,对刮板输送机和刨煤机的重要配件之一——矿用高强度圆环链的性能也提出了越来越高的要求。尤其是需要量最大的φ18mm×64mm矿用高强度圆环链,其C级链除了要求具备高强度外,还要有较高的塑性和韧性。焊接是制造C级链的关键工序,一般采用焊接接头质量很好的预热闪光对焊方法。 With the development of coal mining, mining and transportation mechanization, the performance of mine high strength circular chain, one of the important parts of scraper conveyor and plow, has also been put forward higher and higher requirements. Especially the largest demand φ18mm × 64mm mine ring with high strength, the C-chain in addition to requiring high strength, but also have high ductility and toughness. Welding is the key process for the manufacture of C-class chains, generally using a good quality preheat weld butt welding method.