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汽车新型压铸零部件的铸造工艺分析
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河南省二机石油装备集团有限公司技术攻关项目(gs17004)


Analysis of Casting Process for the New Automotive Diecasting Parts
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    摘要:

    对Mg-9Al-1Zn-05Ce汽车新型压铸零部件试样进行了压铸成型,并进行了力学性能和耐腐蚀性能的测试和分析。结果表明:随浇注温度的升高和压射速度的加快,试样的抗拉强度、屈服强度先增大后减小,腐蚀电位正移后逐渐负移,伸长率变化幅度较小,力学性能和耐腐蚀性能均先提升后下降;与620 ℃浇注温度压铸时相比,650 ℃浇注温度下的抗拉强度、屈服强度分别增大了1308%、2378%,断后伸长率减小了1%,腐蚀电位正移了43 mV;与1 m/s压射速度压铸时相比,3 m/s压铸下的抗拉强度、屈服强度分别增大了1120%、1645%,断后伸长率减小了08%,腐蚀电位正移了31 mV。Mg-9Al-1Zn-05Ce汽车新型压铸零部件的压铸工艺参数优选为:650 ℃始锻温度、3 m/s压射速度。

    Abstract:

    The samples of the new diecasting parts of Mg-9Al-1Zn-05Ce were diecasted, and the mechanical properties and corrosion resistance were tested and analyzed. The results show that with the increase of pouring temperature and the speed of injection, the tensile strength and yield strength of the samples first increase and then decrease, and the corrosion potential shifts gradually after the positive shift, and the elongation changes little. Both mechanical performance and corrosion resistance are first improved and then decreased. Compared with the casting temperature of 620 ℃, the tensile strength and yield strength at the casting temperature of 650 ℃ respectively increase by 1308% and 2378%, the elongation after fracture decreases by 1%, and the corrosion potential is shifted by 43 mV. Compared with diecasting samples at the injection speed of 1 m/s, the tensile strength and yield strength at the die casting speed of 3 m/s increase by 1120% and 1645% respectively, and the elongation after fracture decreases by 08%. The corrosion potential is shifted by 31 mV. The diecasting process parameters of the new diecasting parts of Mg-9Al-1Zn-05Ce are optimized to be 650 ℃ initial forging temperature and 3 m/s injection speed.

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曹辉,杜恭贺.汽车新型压铸零部件的铸造工艺分析[J].机床与液压,2020,48(22):59-63.
CAO Hui, DU Gonghe. Analysis of Casting Process for the New Automotive Diecasting Parts[J]. Machine Tool & Hydraulics,2020,48(22):59-63

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  • 在线发布日期: 2021-04-22
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