变形处理对Zn-0.75Cu-0.15Ti合金组织和力学性能的影响  

Microstructure and Mechanical Properties of Zn-0.75Cu-0.15Ti Alloy with Different Deformation Treatments

作　　者：刘国彬[1] 陈紫微 顾胡维 孟庆坤[2] 戚继球[2] LIU Guobin;CHEN Ziwei;GU Huwei;MENG Qingkun;QI Jiqiu(Jiangsu Zhongkuang Dazheng Surface Engineering Technology Co.,LTD.,Xuzhou 212006,China;School of Materials and Physics,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]江苏中矿大正表面工程技术有限公司,江苏徐州212006 [2]中国矿业大学材料与物理学院,江苏徐州221116

出　　处：《铜业工程》2023年第1期28-35,共8页Copper Engineering

基　　金：国家自然科学基金项目(52171091,51971241)资助。

摘　　要：中国富锌少铜,作为铜合金替代材料的Zn-Cu-Ti具有安全无毒、质轻价廉等一系列优点,已被广泛应用在机械制造、汽车制造等领域,因此探寻对Zn-Cu-Ti的变形处理以达到优秀的力学性能具有重要意义。本文将热挤压与多道次热轧工艺相结合来制备Zn-Cu-Ti板材,研究变形处理对合金微观组织和力学性能的影响。合金经热挤压变形后,合金晶粒尺寸减小,呈现细小等轴晶状结构,Zn基体中存在CuZn_(5)和TiZn_(3)第二相颗粒,变形后第二相颗粒有所增加。挤压后的合金经轧制变形处理,组织中晶粒存在长大现象,致使晶粒尺寸分布不均匀,第二相数量随着合金变形量增加而增多。轧制变形后,合金的抗拉强度存在一定程度下降,塑性提高,这主要归功于合金板材基体中Cu固溶强化作用的降低和晶粒长大。China is rich in zinc and less copper. Zn-Cu-Ti alloy as a substitute material for copper alloy, has a series of advantages such as safety, non-toxic, light weight and low price, and has been widely used in machinery manufacturing, automobile manufacturing and other fields. Therefore, it is of great significance to explore the deformation treatment of Zn-Cu-Ti to achieve excellent mechanical properties. This paper combined hot extrusion with multi-pass hot rolling process to prepare Zn-Cu-Ti plates and the influence of deformation treatment on the microstructure and mechanical properties was investigated. After hot extrusion deformation, grain size of the alloy decreases and a fine equiaxed crystal structure was obtained. CuZn_(5) and TiZn_(3) second phase particles existed in Zn matrix, and the second phase particles increased after deformation. After rolling deformation treatment, the grains in the microstructure grew up, resulting in uneven distribution of grain size, and the number of the second phase increased with the increase of alloy deformation.After rolling deformation, the tensile strength of the alloy decreased to a certain extent, and the plasticity increased, which was mainly due to the reduction of Cu solution strengthening effect and grain growth in the alloy.

关 键 词：Zn-0.75Cu-0.15Ti 形变诱导 合金组织 力学性能 拉伸强度 

分 类 号：TG146.13[一般工业技术—材料科学与工程]