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1991年10月在京由机电部科技司主持的鉴定会,对机械科学研究院可靠性研究中心和华中理工大学共同承担的“七五”模具技术开发项目——提高异形薄长冷冲凸模寿命的研究进行了技术鉴定。参加鉴定会的有专家、用户及有关领导共计36人。鉴定会认为:用6CrNiSiMoV高强韧性低合金凸模具钢(GD钢)制造异形薄
October 1991 in Beijing by the Department of Electrical and Mechanical Technology Division presided over the identification of the Institute of Mechanical Reliability Research Center and Huazhong University of Science and Technology jointly funded “75 ” mold technology development projects - to improve the shape of thin long cold punch Die life research conducted a technical appraisal. A total of 36 experts, users and relevant leaders participated in the appraisal meeting. Identification will be considered: 6CrNiSiMoV high strength and low alloy convex tooling steel (GD steel) to create special thin