CuSn10P1合金薄壁轴套挤压铸造组织均匀性及性能研究  

Study on Microstructure Uniformity and Properties of CuSn10P1 Alloy Thin Walled Shaft Sleeve by Squeeze Casting

作　　者：杨琼[1,2] 周荣锋 李永坤[3] YANG Qiong;ZHOU Rong-feng;LI Yong-kun(Yunnan College of Mechanical and Electrical Technology,Kunming 650203,Yunnan,China;Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;City College,Kunming University of Science and Technology,Kunming 650093,Yunnan,China)

机构地区：[1]云南机电职业技术学院,云南昆明650203 [2]昆明理工大学材料科学与工程学院,云南昆明650093 [3]昆明理工大学城市学院,云南昆明650093

出　　处：《铸造》2023年第1期61-64,65,66,共6页Foundry

基　　金：国家自然科学基金(51765026);云南省教育厅科学研究基金项目(2019J0449)。

摘　　要：分别采用液态挤压铸造和半固态流变挤压铸造成形CuSn10P1合金薄壁轴套,对轴套组织均匀性和拉伸力学性能进行了研究。结果表明,半固态挤压铸造CuSn10P1合金轴套组织中物相尺寸和形态分布均匀性显著提高;半固态铸造组织显著细化和球化,基体相内部锡元素固溶度得到显著提高;δ和Cu_(3)P脆性物相分布于高锡含量的细小α相之间;半固态挤压铸造薄壁轴套的抗拉强度和伸长率较液态挤压铸造轴套分别提高了26%和318%。The thin-walled shaft sleeves of CuSn10P1 alloy were formed by the liquid squeeze casting and semi-solid rheo squeeze casting, respectively. Their microstructure uniformity and tensile properties were comparatively investigated. The results show that the uniformity of phase size and morphology distribution in semi-solid casting CuSn10P1 alloy shaft sleeve is significantly improved;the microstructure of semi-solid casting CuSn10P1 alloy shaft sleeve is significantly refined and spheroidized, and the solid solubility of Sn element in the matrix phase is significantly improved;δ and Cu_(3)P brittle phases are distributed between the fine α phases with high Sn element content;the tensile strength and elongation of thin-walled shaft sleeve made by semisolid squeeze casting are higher than those by liquid squeeze casting. The results show that the tensile strength and elongation are increased by 26% and 318%, respectively.

关 键 词：CuSn10P1合金 薄壁轴套 半固态流变挤压铸造 细晶强化 固溶强化 

分 类 号：TG14[一般工业技术—材料科学与工程] TG15[金属学及工艺—金属材料]