锻压技术

固溶-时效对2195铝锂合金型材力学性能的影响

英文标题：Influence of solution-aging on mechanical properties for 2195 Al-Li alloy profile

作者：马康1 王清峰2 3 宋健1 初冠南2 3

单位：1.天津航天长征火箭制造有限公司 2. 哈尔滨工业大学（威海）3. 哈工大(威海)创新创业园有限责任公司

分类号：TG166.3

出版年,卷(期):页码：2023,48(2):203-209

摘要：

2195铝锂合金作为可热处理强化新型铝锂合金的代表，具有高比强度、高耐腐蚀和抗疲劳等优点，常作为受力结构件被广泛应用于航天航空领域，因此，有必要对其热处理制度展开研究。通过室温单轴拉伸试验和硬度测试，获得了在不同固溶温度、不同固溶时间、不同人工时效温度和不同人工时效时间下的型材的强度、伸长率和硬度值，研究了固溶-时效参数对O态2195铝锂合金型材力学性能的影响。结果表明：在520 ℃下固溶1.5 h以上，再在高于160 ℃的环境下至少保温24 h进行人工时效，可使2195铝锂合金型材满足工程需求。运用最小二乘法建立了2195铝锂合金型材的硬度值与抗拉强度值之间的线性关系，可以较快地得出强度值。

2195 Al-Li alloy as a representative of the new Al-Li alloy which can be strengthened by heat treatment, it has the advantages of high specific strength, high corrosion resistance and fatigue resistance, and it is often used as a stressed structural part in the aerospace field, so it is necessary to study its heat treatment process. Therefore, the strength, elongation and hardness values of profile at different solution temperatures, different solution times, different artificial aging temperatures and different artificial aging times were obtained by the uniaxial tensile test at room temperature and the hardness test, and the influence of solution-aging parameters on the mechanical properties of 2195 Al-Li alloy profile in O state was studied. The results show that 2195 Al-Li alloy profile meets the engineering requirements by solution treatment at 520 ℃ for more than 1.5 h, and then artificial aging at an environment higher than 160 ℃ for least 24 h. The linear relationship between hardness and tensile strength values of 2195 Al-Li alloy profile is established by the least square method, and the strength value can be obtained quickly.

基金项目：

山东省重大科技创新工程(2020CXGC010303); 国家自然科学基金重点项目(U1937205); 山东省重大科技创新工程(2019TSLH0103)

作者简介：马康 (1986-)，男，硕士，工程师，E-mail：wqf1826@163.com；通信作者：初冠南 (1979-)，男，博士，教授，E-mail：chuguannan@hit.edu.cn

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