一、前言硼钢从正式应用到现在虽然只有四十多年的历史,发展却极为迅速,无论是理论研究还是生产实践,都积累了丰富的经验。但是,至今仍有许多问题尚未解决,影响了硼钢的进一步扩大使用。其中主要的一个问题就是淬透性及机械性能不稳定。以广泛使用 I. Introduction Boron steel from the formal application to the present Although only forty years of history, the development is extremely rapid, both theoretical research and production practices, have accumulated rich experience. However, there are still many unresolved problems that have affected the further expansion of boron steel. One of the main problems is the hardenability and mechanical instability. To be widely used