By experiment, heating low-carbon steel and low-carbon alloyed steel till they are aus-tenized and quenching tbem rapidly to obtain a low-carbon martensitic lath structure, the performance and service life of high strength bolts are improved.

• 本文通过试验将低碳钢和低碳合金钢加热至高温奥氏体化后进行快速急冷淬火,获得低碳板条马氏体组织,提高了高强度螺栓的性能和使用寿命。