Mg-10Gd-2Y-0.15Ti高强镁合金的铸造工艺及性能研究.pdfVIP

HotWorkingTechnology2020,Vol.49,No.l7

Mg-10Gd-2Y-0.15Ti高强镁合金的

铸造工艺及性能研究

门超

(承德石油高等专科学校，河北承德067000)

摘要：采用不同的浇注温度对Mg-10Gd-2Y-0.15Ti髙强镁合金试样进行了铸造，并进行了显微组织、拉伸性能

和耐腐蚀性能的测试与分析。结果表明：随浇注温度的升高，试样的强度先逐渐增大后减小，断后伸长率变化幅度较

小，腐蚀电位先正移后逐渐负移，拉伸性能和耐腐蚀性能先提升再下降。在720°C浇注温度下试样的抗拉强度和屈

服强度最大，腐蚀电位最正。高强镁合金试样的浇注温度优选720°C。

关键词：汽车；高强镁合金；浇注温度；显微组织；拉伸性能；腐蚀性能

DOI:10.14158/j.cnki.1001-3814.

中图分类号：TG249;TG146.22文献标识码：A文章编号：1001-3814(2020)17-0072-03

StudyonCastingTechnologyandPropertiesofMg-10Gd-2Y-0.15Ti

HighStrengthMagnesiumAlloy

MENChao

(ChengdePetroleumCollege,Chengde067000,China)

Abstract：ThespecimensofMg-10Gd-2Y-0.15Tihigh-strengthmagnesiumalloywerecastbyusingdifferentcasting

temperatures,andthemicrostructure,tensilepropertiesandcorrosionresistanceweretestedandanalyzed.Theresultsshow

thatwiththeincreaseofpouringtemperature,thestrengthofthespecimensincreasesfirstandthendecreases,theelongation

afterbreakchangesslightly,thecorrosionpotentialshiftspositivelyfirstandthennegatively,andthetensilepropertiesand

corrosionresistanceimprovefirstandthendecrease.Atpouringtemperatureof720°C,thetensilestrengthandyieldstrength

ofthesamplesarethehighest,