1.前言在初轧生产中,钳式吊车夹钳头部装上的吊牙不仅要承受高温、大负荷,而且要在红热状态下淬水冷却,所以吊牙材料应具有耐高温、耐磨和较高的抗冷热疲劳性能。目前国内初轧厂使用的吊牙多采用堆焊的方法制造,基材一般选用45钢或35钢,牙尖一般用 D337、D667或 D512焊条堆焊。由 1. Preface In the first rolling production, clamp-type crane jaw mounted on the head not only to withstand high temperature and heavy load, but also to quench the water in the red hot state cooling, so the cork material should have high temperature resistance Grinding and high resistance to hot and cold fatigue properties. At present, the domestic hanging mill used to build more use of surfacing welding method, the substrate is generally used 45 steel or 35 steel, Cuspidor generally D337, D667 or D512 electrode surfacing. by