CAJ | 학술논문

利用金相显微镜、显微硬度计及拉伸试验机对不同压力挤压铸造Mg-Al-Ca合金的组织和性能进行了研究。结果表明，提高压力降低了挤压铸造合金中第二相的比例及其孔隙率。在30 MPa以下，随着压力的提高，合金的伸长率、抗拉强度、显微硬度和屈服强度均逐渐提高，在高压下挤压铸造合金的韧性较佳。
이용금상현미경、현미경도계급랍신시험궤대불동압력제압주조Mg-Al-Ca합금적조직화성능진행료연구。결과표명，제고압력강저료제압주조합금중제이상적비례급기공극솔。재30 MPa이하，수착압력적제고，합금적신장솔、항랍강도、현미경도화굴복강도균축점제고，재고압하제압주조합금적인성교가。
Microstructure and mechanical properties of Mg-Al-Ca alloy prepared by squeeze casting under different pressures were investigated by using optical microscope, microhardness tester and tensile test machine. The results show that increasing applied pressure decreases the fraction of second phase and porosity of the alloy. When the squeeze pressure lower than 30 MPa, the elongation, tensile strength, microhardness and yield strength of the alloy increase gradually with the increase of the pressure. A preferable toughness is obtained under higher pressure.