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在低压状态下(一般10～0.01Pa)所进行的热处理称为真空热处理。它是二次世界大战后发展起来的一种热处理新工艺。由于真空热处理后工件具有不氧化、不脱碳,表面光洁、力学性能高、热处理变形小以及作业条件好等一系列优点。所以近二十年来发展非常迅速,已成为热处理发展的一个重要方面。 60年代初,我国开始从苏联引进一些以Mo、W等难熔金属作为发热元件和隔热材料的真空退火炉,主要应用于电子行业的磁性材料、精密合金的退火。进入70年代以后,我国陆续从日本Hayes公司,美国
Under low pressure (usually 10 ~ 0.01Pa) carried out by the heat treatment is called vacuum heat treatment. It is a new heat treatment developed after World War II. Because the vacuum heat treatment after the workpiece has a non-oxidation, non-decarbonization, smooth surface, high mechanical properties, thermal deformation and good operating conditions, a series of advantages. Therefore, the rapid development in the past 20 years has become an important aspect of the development of heat treatment. In the early 1960s, China began to introduce some vacuum annealing furnaces from the Soviet Union that used Mo, W and other refractory metals as heating elements and heat insulating materials. They are mainly used in the electronics industry for magnetic materials and precision alloy annealing. After entering the 70’s, our country one after another from Japan Hayes, the United States