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真空等温热处理是近几年探索出来的一种新技术,真空等温热处理后的工件,具有淬透性好、硬度高、机械性能好、变形小和表面有金属光泽,热处理后可以省去磨削、喷砂等工序,是一种有前途的热处理技术。有关真空等温热处理工艺可参见本刊今年第1期的介绍,本文仅就真空等温热处理用淬火介质的一些问题作一简要论述。一、真空等温热处理用淬火介质一般普通等温热处理用的淬火介质是用硝酸钠、硝酸钾、亚硝酸钠和亚硝酸钾的混合
Vacuum isothermal heat treatment is explored in recent years, a new technology, vacuum heat treatment of the workpiece, with good hardenability, high hardness, good mechanical properties, small deformation and the surface of the metal luster, heat treatment can be Save grinding, sandblasting and other processes, is a promising heat treatment technology. The vacuum isothermal heat treatment process can be found in this issue of the first issue of this article, this article only on the vacuum isothermal heat treatment of quenching some of the issues for a brief discussion. First, the vacuum isothermal heat treatment with quenching medium General isothermal heat treatment quenching medium is the use of sodium nitrate, potassium nitrate, sodium nitrite and potassium nitrite mixed