概述 本世纪五十年代后期。随着工业和科学技术的迅速发展,真空热处理被急切地提到日程上来。明显的事实是真空热处理能够防止氧化和脱碳,处理后工件表面光滑、变形小、零件尺寸稳定、表面硬度和耐磨性较高。工模具经真空淬火后寿命比普通淬火增加一倍。因而世界各国对于新型热 Overview of the late fifties of this century. With the rapid development of industry and science and technology, vacuum heat treatment is urgently mentioned on the agenda. The obvious fact is the vacuum heat treatment to prevent oxidation and decarburization, the workpiece surface after treatment smooth, small deformation, the size of the parts stable, high surface hardness and wear resistance. Tool life after vacuum quenching than ordinary doubled. Thus all countries in the world are new to heat