由机械部郑州机械研究所负责,武汉热处理厂参加的国家“六五”重点科技攻关项目“离子碳氮共渗工艺及设备研究”课题,于1986年12月25～26日在郑州通过技术鉴定。鉴定会由机械科学研究院主持,与会代表30余人。鉴定会认为,该课题研制的双室立式真空离子多用炉,将真空加热、离子加热、淬火冷却联为一体, Zhengzhou Machinery Research Institute under the responsibility of the Ministry of Machinery, Wuhan heat treatment plant to participate in the national “six five ” key scientific and technological project “ion carbonitriding process and equipment research ” project, in December 1986 December 25 to 26 Zhengzhou passed the technical appraisal. Appraisal will be presided over by the Academy of Machinery Science and Technology, more than 30 delegates attended. Identification will think that the subject developed double-chamber vertical vacuum ion multi-purpose furnace, the vacuum heating, ion heating, quenching and cooling as a whole,