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真空渗碳也叫低压渗碳,是七十年代以来在高温渗碳和真空淬火基础上发展起来的一项新技术。美国易卜生(Ipsen)公司在五十年代提出了真空渗碳的可能性,于1960年申请了真空渗碳工艺的专利。1968年美国海斯(Hayes)公司首先在 VCQ 型油冷和气冷两用真空热处理炉中添置了气体渗碳装置,进行了高温渗碳试验,于1972年取得了肯定效果,提出了“用甲烷在20～80毫米汞柱的脉动压力下进行渗碳和扩散的真空渗碳法”的专利申请。后来又经过进一步试验改进,于1974年6月
Vacuum carburizing, also called low-pressure carburizing, is a new technique developed on the basis of high-temperature carburizing and vacuum quenching since the seventies. The American company Ipsen proposed the possibility of vacuum carburization in the fifties and applied for the patent of vacuum carburization in 1960. In 1968, Hayes Company first added a gas carburizing device to the VCQ oil-cooled and air-cooled dual-purpose vacuum heat treatment furnace and carried out the high-temperature carburizing test. The result was affirmative in 1972, and the “ Vacuum carburizing of carburizing and diffusing methane at a pulsating pressure of 20 to 80 mmHg ”. Later, after further testing and improvement, in June 1974