锻压技术

新型镁合金机械外壳的冲锻工艺优化

英文标题：Optimization on stamping and forging process for new type magnesium

作者：李磊姬川应纪来

关键词：机械外壳 Mg-3Mn-0.5Ti-0.3V新型镁合金冲锻工艺冲击性能耐腐蚀性能

分类号：TG316

出版年,卷(期):页码：2019,44(3):10-16

摘要：

采用不同工艺对Mg-3Mn-0.5Ti-0.3V新型镁合金机械外壳试样进行冲锻试验，并通过冲击性能和耐腐蚀性能进行测试、比较和分析。结果表明：随反顶力和压边力的增大、锻造温度的升高，试样冲击性能和耐腐蚀性能先提升后下降。与2 kN反顶力相比，4 kN反顶力使试样的冲击吸收功增大22.1%、腐蚀电位正移0.077 V；与2 kN压边力相比，3.5 kN压边力使试样的冲击吸收功增大25.8%、腐蚀电位正移了0.086 V；与290 ℃锻造温度相比，380 ℃锻造温度使试样的冲击吸收功增大20.3%、腐蚀电位正移0.083 V。Mg-3Mn-0.5Ti-0.3V新型镁合金机械外壳冲锻时的反顶力优选4 kN、压边力优选3.5 kN、锻造温度优选380 ℃。

The stamping and forging tests of Mg-3Mn-0.5Ti-0.3V new type magnesium alloy mechanical shell samples were carried out by different processes, and tested, compared and analyzed by impact property and corrosion resistance. The results show that the impact property and corrosion resistance of the specimens increase firstly and then decrease with the increase of counterforce, blank holder force and forging temperature. Compared with counterforce of 2 kN, counterforce of 4 kN increases the impact absorption energy of the specimen by 22.1% and shifts the corrosion potential positively by 0.077 V. Compared with blank holder force of 2 kN, blank holder force of 3.5 kN increases the impact absorption energy of the specimen by 25.8% and shifts the corrosion potential positively by 0.086 V. Compared with forging temperature of 290 ℃, forging temperature of 380 ℃ increases the impact absorption energy of the specimen by 20.3% and shifts the corrosion potential positively by 0.083 V. Thus, the optimum counterforce, blank holder force and forging temperature of Mg-3Mn-0.5Ti-0.3V new type magnesium alloy mechanical shell are 4 kN, 3.5 kN and 380 ℃, respectively.

基金项目：

中国国家留学基金留金项目（［2018］10015）；河南省高等教育教学改革研究项目（2014SJGLX467）

李磊（1978-），男，硕士，副教授，E-mail：375330254@qq.com

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