锻压技术

固溶温度对粉末触变锻造制备2024铝合金组织和力学性能的影响

英文标题：Influence of solution temperature on microstructure and mechanical properties of 2024 aluminum alloy produced by powder thixoforging

作者：王张军陈体军

单位：兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室

关键词：粉末触变锻造 2024铝合金固溶温度显微组织力学性能

分类号：粉末触变锻造；2024铝合金；固溶温度；显微组织；力学

出版年,卷(期):页码：2018,43(10):30-35

摘要：

采用一种新型的粉末触变锻造技术制备了2024铝合金，采用光学显微镜（OM）、扫描电镜（SEM）和X射线衍射（XRD）等分析手段，研究了固溶温度对粉末触变锻造2024铝合金和金属型铸造2024铝合金显微组织和力学性能的影响。研究表明：随着固溶温度的升高，粉末触变锻造2024铝合金的抗拉强度、屈服强度、伸长率都逐渐增加，在490 ℃×3 h时，综合力学性能达到最佳，其抗拉强度、屈服强度和伸长率分别为350 MPa,270 MPa和17.5%；金属型铸造2024铝合金最佳固溶工艺为490 ℃×12 h，其抗拉强度、屈服强度和伸长率分别达到320 MPa,245 MPa和15.2%；相比金属型铸造2024铝合金，粉末触变锻造2024铝合金的抗拉强度、屈服强度和伸长率分别提高了9.4%，10.2%和15.1%。

2024 aluminum alloy was produced by a new type of powder thixoforging method, and the influences of solution temperature on microstructure and mechanical properties of powder thixoforging and casting 2024 aluminum alloys were studied by optical microscope (OM), scanning electron microscope(SEM) and Xray diffraction (XRD). The results show that the tensile strength, yield strength and elongation rate of powder thixoforging 2024 aluminum alloy increase gradually with the increasing of solution temperature, and the comprehensive mechanical properties achieve the best at 490 ℃×3 h with the tensile strength of 350 MPa, the yield stress of 270 MPa and the elongation rate of 17.5%. However, the best solution technology of casting 2024 aluminum alloy is at 490 ℃×12 h, and its tensile strength, yield strength and elongation rate are 320 MPa, 245 MPa,15.2%, respectively. Comparing with casting 2024 aluminum alloy, the tensile strength, yield strength, and elongation rate of powder thixoforging 2024 aluminum alloy are increased by 9.4%, 10.2%, 15.1%, respectively.

基金项目：

甘肃省高校基本科研经费资助项目（G2014-07）;高校新世纪优秀人才资助项目（NCET-10-0023）

王张军（1992-），男，硕士研究生，E-mail：wangzj4991@163.com；通讯作者：陈体军（1971-），男，博士，博士生导师，E-mail：chentj1971@126.com

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