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决定钢淬火质量的基本因素之一,是它的冷却规范。同时,研究两个临界温度范围内的冷却条件是最重要的:一个是奥氏体最不稳定的区域(600～500℃),另一个是马氏体转变区(M_H～M_K点)。在前一温度范围内,必须冷却得快而且均匀。因为冷却速度快,能保证淬火后硬度高和淬透性高,而冷却均匀则可以减少变形。因为这时钢的组
One of the basic factors that determine the quality of steel quenching is its cooling specification. At the same time, it is of paramount importance to study the cooling conditions in two critical temperature ranges: one is the most unstable region of austenite (600-500 ℃) and the other is the martensitic transformation region (M_H ~ M_K). In the previous temperature range, it must be cooled quickly and evenly. Because the cooling speed, to ensure high hardness and hardenability after quenching, while cooling can reduce the deformation. Because of the group of steel at this time