18XHBA和18XHMA号的结构钢,具有高度的机械性能和工艺性,因此机器制造业中广泛采用它来制造重负荷零件。 这种钢的现有缺点为易于形成片状和层状的组织,当软化退火时,很难降低其渗碳表面的硬度。 下面论述软化退火研究的结果,并根据此结果制订出运用于成批生产中具有高度生产效 18XHBA and 18XHMA structural steel, with a high degree of mechanical properties and processability, so widely used in the machinery manufacturing industry to manufacture heavy-duty parts. The current disadvantages of this type of steel are that it is easy to form flaky and lamellar structures and that it is difficult to reduce the hardness of the carburized surface thereof during softening annealing. The following is a discussion of the results of the softening annealing study, and based on this result, it is formulated to be used in batch production with high production efficiency