锻压技术

不同轧制厚度TC4钛合金板材的组织与性能

英文标题：Microstructure and properties of TC4 titanium alloy sheets with different rolling thicknesses

单位：1.新疆湘润新材料科技有限公司 2.大连交通大学连续挤压教育部工程研究中心 3.长春工业大学应用技术学院

分类号：TG335.4

出版年,卷(期):页码：2022,47(6):153-159

摘要：

选取4种不同厚度的TC4钛合金轧制板材，利用金相显微镜以及力学性能试验，对其进行金相组织和力学性能研究。结果表明：经轧制及退火后的TC4钛合金板材的组织为α相与残余β相组成的混合组织，α相的形貌呈现出线条状、等轴状以及细小团状等特征；TC4钛合金板材强度总体呈现出随着厚度的增加先降低再趋于稳定的趋势，而塑性呈现出先升高再趋于稳定的趋势；当厚度为0.8 mm时，TC4钛合金板材的强度最大，抗拉强度为1075 MPa、屈服强度为1027 MPa，且4种规格TC4钛合金板材经轧制退火后沿RD与TD方向的强度与塑性均有一定差值；不同规格TC4钛合金板材拉伸后的微观断口形貌均以韧窝为主，其中厚度为0.8 mm的TC4钛合金板材沿TD方向的断口形貌中除具有韧窝形貌外，还具有一定数量的小平面，韧窝内部存在大量、特别细小的微裂纹。

Four kinds of TC4 titanium alloy rolled sheets with different thicknesses were selected, and the metallographic structures and mechanical properties of sheets with different thicknesses were studied by metallographic microscope and mechanical property test. The results show that the microstructure of TC4 titanium alloy sheets after rolling and annealing is a mixed structure composed of α phase and residual β phase, and the morphology for α phase presents the characteristics of linear, equiaxed and small clusters. With the increasing of thickness, the strength of TC4 titanium alloy shees decreases first and then tends to be stable, while the plasticity increases first and then tends to be stable. When the thickness is 0.8 mm, the strength of TC4 titanium alloy sheets is the largest, the tensile strength is 1075 MPa, and the yield strength is 1027 MPa. The strength and plasticity along the RD and TD directions for four kinds of TC4 titanium alloy sheets with different specifications after rolling and annealing are different. The fracture morphology of TC4 titanium alloy sheets with different specifications after tensile is mainly dimple. In addition to dimple morphology, there are a certain number of small planes along the TD direction for the fracture morphology of TC4 titanium alloy sheet with the thickness of 0.8 mm, and there are also a large number of especially fine micro-cracks inside the dimples.

基金项目：

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-天山创新团队计划项目（2020D14041）

同晓乐(1987-)，男，学士，中级工程师 E-mail：xjxrunjs@163.com 通信作者：岳旭(1985-)，男，硕士，高级工程师 E-mail：yuexu100@163.com

参考文献：

[1]吴晨,马保飞,肖松涛,等.航天紧固件用TC4钛合金棒材固溶时效后的组织与性能[J].金属热处理,2021,46(11):166-169.

Wu C, Ma B F, Xiao S T, et al.Microstructure and properties of TC4 titanium alloy bars for aerospace fasteners after solution and aging[J].Heat Treatment of Metals,2021,46(11):166-169.

[2]王瑶,李永刚,李文辉,等.深冷处理对TC4钛合金滚磨光整加工性能的影响[J].稀有金属,2021,45(11):1289-1298.

Wang Y, Li Y G, Li W H, et al. Effect of cryogenic treatment on the rolling finishing performance of TC4 titanium alloy[J].Chinese Journal of Rare Metals, 2021,45(11):1289-1298.

[3]徐凯华,刘海军,闫江鹏,等.热等静压态TC4钛合金在多道次热压缩变形中的组织演变[J].塑性工程学报,2021,28(7):150-156.

Xu K H, Liu H J, Yan J P, et al.Microstructure evolution of hot isostatic TC4 titanium alloy during multi-pass hot compression deformation[J]. Journal of Plasticity Engineering,2021,28(7):150-156.

[4]李洪波,王琳,田锋,等.TC4钛合金薄壁筒形件反挤压成形及微观组织演化[J].塑性工程学报,2021,28(10):19-26.

Li H B, Wang L, Tian F, et al.Reverse extrusion forming and microstructure evolution of TC4 titanium alloy thin-walled cylindrical parts[J]. Journal of Plasticity Engineering,2021,28(10):19-26.

[5]韩盈,余伟,董恩涛,等.轧制工艺对TC4合金板材织构演变及组织和性能的影响[J].稀有金属材料与工程,2021,50(10):3585-3590.

Han Y,Yu W, Dong E T, et al. Effect of rolling process on texture evolution, microstructure and properties of TC4 alloy sheet [J]. Rare Metal Materials and Engineering,2021,50(10):3585-3590.

[6]王伟,宫鹏辉,史亚鸣,等.轧制火次对EB熔炼TC4钛合金显微组织、织构和力学性能的影响[J/OL].中国有色金属学报:1-18[2022-05-07].http://kns.cnki.net/kcms/detail/43.1238.TG.20211025.1612.005.html

Wang W, Gong P H, Shi Y M, et al. Effect of rolling times on microstructure, texture and mechanical properties of EB melting TC4 titanium alloy[J/OL]. The Chinese Journal of Nonferrous Metals: 1-18[2022-05-07].http://kns.cnki.net/kcms/detail/43.1238.TG.20211025.1612.005.html

[7]GB/T 23605—2009, 钛合金β转变温度测定方法[S].

GB/T 23605—2009, Method for β transus temperature determination of titanium alloys [S].

[8]Barnett M R, Kestens L . Formation of {111} and {111} textures in cold rolled and annealed IF sheet steel[J]. ISIJ International, 1999, 39(9):923-929.

[9]王牛俊,罗乾伟.TC4钛合金板不同加工条件下组织对比研究[J].材料开发与应用,2017,32(4):95-100.

Wang N J, Luo Q W.Comparative study on microstructure of TC4 titanium alloy plate under different processing conditions [J]. Development and Application of Materials,2017,32(4):95-100.

[10]安震,李天麒,王琛,等.Ti555211钛合金片层组织拉伸过程裂纹扩展的SEM原位观察[J].稀有金属材料与工程,2019,48(3):853-858.

An Z, Li T Q, Wang C, et al. In-situ SEM observation of crack propagation in lamellar microstructure of Ti555211 titanium alloy during tensile process[J]. Rare Metal Materials and Engineering,2019,48(3):853-858.

[11]朱新杰,范群波,余洪,等.Ti-4.5Mo-5.1Al-1.8Zr-1.1Sn-2.5Cr-2.9Zn钛合金的动态力学性能及失效研究[J].稀有金属材料与工程,2020,49(4):1235-1241.

Zhu X J,Fan Q B,Yu H,et al.Research on dynamic mechanical properties and failure of Ti-4.5Mo-5.1Al-1.8Zr-1.1Sn-2.5Cr-2.9Zn titanium alloy[J]. Rare Metal Materials and Engineering,2020,49(4):1235-1241.

[12]刘清华,惠松骁,叶文君,等.不同组织状态TC4 ELI钛合金动态力学性能研究[J].稀有金属,2012,36(4)：517-522.

Liu Q H, Hui S X, Ye W J,et al.Dynamic mechanical properties of TC4 ELI titanium alloy with different microstructure[J]. Chinese Journal of Rare Metals, 2012,36(4):517-522.

[13]Nasiri-Abarbekoh H, Ekrami A,Ziaei-Moayyed A A, et al. Effects of rolling reduction on mechanical properties anisotropy of commercially pure titanium[J]. Materials & Design, 2012, 34(11):268-274.

[14]张虎. 热处理工艺对新型高强β钛合金组织和性能的影响[D]. 西安：西安建筑科技大学,2013.

Zhang H.Effect of Heat Treatment Process on Microstructure and Properties of New High Strength β Titanium Alloy [D]. Xi′an：Xi′an University of Architecture and Technology, 2013.

服务与反馈：

【文章下载】【加入收藏】