摘要
对Al-Cu-Mn合金ZL210A砂型试样进行了540℃×6 h固溶,再进行(120~180)℃×8 h的时效处理。通过OM、XRD、拉伸性能测试等手段与方法,研究了不同时效处理对ZL210A合金组织和性能的影响。结果表明:在120~180℃范围内,随着时效温度的升高,ZL210A合金试样晶内析出相粒子逐渐增多。160℃×8 h时效试样析出相粒子细小均匀、弥散分布在晶内,时效效果最佳。随着时效温度的升高,合金强度先升高后降低,伸长率先降低后升高。160℃时效试样强化效果最好,抗拉强度和屈服强度分别达到487 MPa和392 MPa。时效温度从140℃升高到160℃,合金试样伸长率下降明显,从12.4%下降到7.8%。
The Al-Cu-Mn series alloy ZL210 A sand mold samples were treated by 540℃×6 h solid solution,then(120-180)℃×8 h aging treatments were carried out.The effects of different aging treatments on the microstructure and properties of ZL210 A alloy were studied by means of OM,XRD and tensile property test.The results show that,the precipitation phase particles in ZL210 A alloy samples increase gradually with the increase of aging temperature in the range of 120-180℃.The precipitated phase particles of sample 160℃×8 h aged at are fine and uniform,dispersed in the crystal,and the aging effect is the best.With the increase of aging temperature,the strength of the alloy increases at first and then decreases,and the elongation decreases first and then increases.The strengthening effect of the specimen aged at 160℃is the best,and the tensile strength and yield strength reach 487 MPa and 392 MPa,respectively.When the aging temperature increases from 140℃to 160℃,the elongation of the alloy decreases obviously,from 12.4%to 7.8%.
作者
张晓莹
王基月
ZHANG Xiaoying;WANG Jiyue(College of Mechanical Engineering,Zhengzhou University of Science&Technology,Zhengzhou 450064,China)
出处
《热加工工艺》
北大核心
2019年第18期155-157,共3页
Hot Working Technology
基金
河南省科技厅科技攻关项目(182102210553)
河南省教育厅高等学校重点科研项目(18B460019)
河南省教育厅教改项目(2017SJGLX515)
