一、前言随着国民经济的发展,国防、机械、建筑、交通、石油、化工、电力及冶金工业本身,日益要求提供更多、更好的优质钢材。钢中加入微量的元素——钼,具有细化和均匀钢的组织,扩大淬火、回火温度范围,增加钢材的抗张强度和冲击韧性以及改善钢材的热稳定性等一系列作用。 I. Introduction With the development of the national economy, the defense, machinery, construction, transportation, petroleum, chemical, power and metallurgy industries themselves increasingly demand more and better quality steel products. A small amount of elements added to the steel - molybdenum, with refined and uniform steel structure, expand the quenching and tempering temperature range, increase the tensile strength and impact toughness of steel and improve the thermal stability of steel and a series of roles.