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农机部科技局、冶金部钢铁司、煤炭部制造局于1980年4月14日至19日在上海召开了低淬透性钢技术鉴定会,对齐齐哈尔钢厂、大冶钢厂、西安交通大学、第一拖拉机厂、上海拖拉机厂、上海第一拖拉机附件厂、沈阳拖拉机厂、武汉齿轮厂、常州齿轮厂、福建拖拉机厂、南昌齿轮厂、西安煤矿机械厂、辽源煤矿机械厂、武汉大学、冶金部包头冶金研究所、农机部洛阳拖拉机研究所等单位共同研制、试验的低淬透性钢60DTi、70DTi进行了技术鉴定,讨论通过了“低淬透性钢技术鉴定书”、“低淬透性钢
Bureau of Science and Technology of Ministry of Machinery Industry, Ministry of Metallurgical Metallurgical Division, Bureau of Coal Manufacturing Bureau held a low-hardenability steel technology appraisal meeting in Shanghai from April 14 to April 19, 1980, to Qiqihar Steel Plant, Daye Steel Plant, Xi’an Jiaotong University , The first tractor factory, Shanghai tractor factory, the first tractor annex factory in Shanghai, Shenyang tractor factory, Wuhan gear factory, Changzhou gear factory, Fujian tractor factory, Nanchang gear factory, Xi’an coal mine machinery factory, Liaoyuan coal mine machinery factory, Wuhan University, Metallurgy Baotou Metallurgy Institute, Ministry of Agriculture Luoyang Tractor Institute and other units jointly developed and tested low hardenability of steel 60DTi, 70DTi technical appraisal, discussed and adopted the “low-hardenability steel technical appraisal book,” "low-quench Permeable steel