各种钢在淬火后,由于组织的转变,产生了硬度较高和脆性较大的马氏体组织。在这样状态下,不可能很好地使用,故必须经过配火处理。配火的目的是:(1)獲得稳定的组织;(2)适当的降低硬度,提高韧性;(3)消除内应力。配火处理的好坏直接影响另件的性能和使用寿命。淬火钢在配火中的硬度变化,主要决定于配火温度和配火时间。特别是配火温度的增高,加速了扩散作用,剧烈地影响硬度。配火的温度愈 All kinds of steel after quenching, due to the transformation of the organization, resulting in a higher hardness and brittleness of martensite. In this state, it is impossible to use well, it must be treated with fire. The purpose of matching fire is: (1) to obtain a stable organization; (2) appropriate to reduce the hardness and improve the toughness; (3) eliminate the internal stress. Fire treatment has a direct impact on the performance and life of the other pieces. Quenched steel in the distribution of hardness changes, mainly determined by the matching temperature and fire time. In particular, with the increase of the fire temperature, accelerating the diffusion effect, violently affect the hardness. With the more the temperature of the fire