固溶处理对TC11钛合金组织与性能的影响

doi:10.13251/j.issn.0254-6051.2023.02.030

金属热处理 ›› 2023, Vol. 48 ›› Issue (2): 195-199.DOI: 10.13251/j.issn.0254-6051.2023.02.030

固溶处理对TC11钛合金组织与性能的影响

同晓乐^1,3, 张明玉², 岳旭^1,3, 杨斌¹, 王玉佳¹, 阿热达克·阿力玛斯¹

1.新疆湘润新材料科技有限公司, 新疆哈密 839000;
2.大连交通大学连续挤压教育部工程研究中心, 辽宁大连 116028;
3.新疆钛基新材料重点实验室, 新疆哈密 839000

收稿日期:2022-09-01 修回日期:2022-12-11 出版日期:2023-02-25 发布日期:2023-03-22
通讯作者: 岳旭,高级工程师,硕士, E-mail:yuexu100@163.com
作者简介:同晓乐 (1987—),男,工程师,主要研究方向为钛合金塑性成形,E-mail: xjxrunjs@163.com。
基金资助:
自治区创新环境(人才、基地)建设专项(XJQY2009);自治区创新环境(人才、基地)建设专项—天山创新团队计划(2020D14041)

Effect of solution treatment on microstructure and properties of TC11 titanium alloy

Tong Xiaole^1,3, Zhang Mingyu², Yue Xu^1,3, Yang Bin¹, Wang Yujia¹, Ardak Almas¹

1. Xinjiang Xiangrun New Materials Technology Co., Ltd., Hami Xinjiang 839000, China;
2. Engineering Research Center of Continuous Extrusion,Dalian Jiaotong University,Dalian Liaoning 116028, China;
3. Xinjiang Key Laboratory of Titanium-based New Materials, Hami Xinjiang 839000, China

Received:2022-09-01 Revised:2022-12-11 Online:2023-02-25 Published:2023-03-22

摘要/Abstract

摘要： 通过光学显微镜、扫描电镜、X射线衍射仪以及室温拉伸性能测试,研究TC11钛合金分别在955、975、995和1015 ℃固溶处理后的微观组织与力学性能的对应关系。结果表明,合金原始锻态显微组织为α+β两相区锻造形成的双态组织,以α_p相和β转变组织为主。经固溶处理后,原始锻态组织中被扭转和拉长的α_p相随着固溶温度升高逐渐变小、变圆,同时体积较小的α_p相逐渐消失。固溶温度为995 ℃时,合金强度达到最大值,抗拉强度(R_m)为1403 MPa,屈服强度(R_p0.2)为1158 MPa;固溶温度为955 ℃时,合金塑性最佳,断后伸长率(A)为9.5%,断面收缩率(Z)为32%。当固溶温度位于两相区时,其拉伸断口微观形貌相似,均以韧窝为主;当固溶温度位于单相区时,断口形貌结晶状明显,且有较大的撕裂棱,在岩石状表面有大量撕裂状小韧窝。

关键词: TC11钛合金, 固溶处理, 微观组织, 力学性能, 断口形貌

Abstract: Relationship between microstructure and mechanical properties of the TC11 titanium alloy after solution treatment at 955, 975, 995 and 1015 ℃, respectively, was studied by means of optical microscope, scanning electron microscope, X-ray diffraction and room temperature tensile test. The results show that the original as-forged microstructure of the alloy is a bimodal structure formed by forging in the α+β two-phase region, which is dominated by α_p phase and β transformation structure. After solution treatment, the twisted and elongated α_p phase in the original as-forged structure gradually becomes smaller and rounded with the increase of solution treatment temperature, and the smaller α_p phase gradually disappears. When the solution treatment temperature is 995 ℃, the strengths of the alloy reach the maximum, of which the tensile strength (R_m) is 1403 MPa and the yield strength (R_p0.2) is 1158 MPa. When the solution treatment temperature is 955 ℃, the plasticity of the alloy is the best, of which the elongation after fracture (A) is 9.5% and the percentage reduction of area (Z) is 32%. When the solution treatment temperature is in the two-phase region, the tensile fracture morphology is similar, which is mainly dimples. When the solution treatment temperature is in the single-phase region, the fracture morphology is obviously crystalline and has large tearing edges, and there are a large number of small tearing dimples on the rock-like surface.

Key words: TC11 titanium alloy, solution treatment, microstructure, mechanical properties, fracture morphology

中图分类号:

TG156.1

同晓乐, 张明玉, 岳旭, 杨斌, 王玉佳, 阿热达克·阿力玛斯. 固溶处理对TC11钛合金组织与性能的影响[J]. 金属热处理, 2023, 48(2): 195-199.

Tong Xiaole, Zhang Mingyu, Yue Xu, Yang Bin, Wang Yujia, Ardak Almas. Effect of solution treatment on microstructure and properties of TC11 titanium alloy[J]. Heat Treatment of Metals, 2023, 48(2): 195-199.

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固溶处理对TC11钛合金组织与性能的影响

Effect of solution treatment on microstructure and properties of TC11 titanium alloy

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