锻压技术

TC4钛合金棒材挤压拉拔的金相组织和力学性能演变过程探究

英文标题：Study on microstructure and mechanical properties evolution process in the extrusiondrawing for titanium alloy TC4 bar

作者：崔文俊郭柏兰崔斌王连珍郭金斗

单位：西安赛特思迈钛业有限公司

关键词：TC4钛合金挤压拉拔晶粒细化金相组织力学性能加工硬化

分类号：TG146.2+3

出版年,卷(期):页码：2017,42(10):166-169

摘要：

为实现钛合金的晶粒细化以及批量生产的目的，采用挤压拉拔装置对TC4钛合金棒材进行加工，采用光学显微镜观察各模次的金相组织特征，结果表明，经过多道次的挤压拉拔后，棒材断面的金相组织细小，α和β晶粒达到再破碎的目的，最终的金相组织达到了最高的标准要求。对挤压拉拔的每个模次进行拉伸实验，发现屈服强度和抗拉强度随拉拔模次的增加而升高，而断后伸长率和断面收缩率却变化很小。在单模次挤压拉拔变径量不变的情况下，随挤压拉拔模次增多，加工硬化效果更为明显。综合以上分析，在TC4钛合金棒材生产过程中加入挤压拉拔能够有效地提高棒材的组织与性能。

The titanium alloy TC4 bar was produced by the extrusiondrawing device in order to realize fine grain and mass production, and its microstructure of every pass was observed by optical microscope. The results show that after multiple passes of extrusiondrawing, the microstructure on the cross section of titanium alloy bar appears small α and β grains to achieve the purpose of breaking, and the microstructure meets the highest requirements at last. Then, the tensile test of every pass of extrusiondrawing is conducted, and the material yield strength and tensile strength increase with the increasing of extrusiondrawing passes, while the elongation percentage after fracture and the reduction percentage of cross section change very little. However, when the extrusion diameter of single pass extrusiondrawing remains the same, the hardening effect is more obvious with the increasing of processing passes. From the above analysis, the extrusiondrawing process in the titanium alloy TC4 bar production can effectively strengthen the microstructure and enhance the properties.

基金项目：

陕西省工业科技攻关项目（2016GY-244）

作者简介：崔文俊（1990-），男，学士，工程师，E-mail：524198775@qq.com

参考文献：

[1]张喜燕,赵永庆,白晨光. 钛合金及应用[M] .北京：化学工业出版社,2005.

Zhang X Y, Zhao Y Q, Bai C G. Titanium Alloy and Application[M]. Beijing: Chemical Industry Press,2005.

[2]石德珂. 材料科学基础[M]. 北京：机械工业出版社，1998.

Shi D K. Material Science Fundamental [M]. Beijing: China Machine Press, 1998.

[3]GB/T 13810—2007, 外科植入物用钛及钛合金加工材[S].

GB/T 13810—2007, Wrought titanium and titanium alloy for surgical implants [S].

[4]黄永光.外科植入用钛合金材料及其标准化[J].钛工业进展，2002，38（1）：13-16.

Huang Y G. Titanium alloy material used for surgical implants and its standardization[J].钛工业进展，2002，38（1）：13-16.

[5]鲍利索娃. 钛合金金相学[M]. 陈石卿, 译. 北京：国防工业出版社，1986.

Pauli Sowa. Metallography of Titanium Alloy [M]. Translated by Chen S Q. Beijing: National Defense Industry Press, 1986.

[6]蔡建明，郝孟一，杜鹃.SP700钛合金的晶粒细化[J].金属学报，2002，38(Z1)：147-149.

Cai J M, Hao M Y, Du J. Study on the grain refinement of SP700 titanium alloy[J].Acta Metallurgica Sinica, 2002, 38(Z1)：147-149.

[7]徐杰,肖铁忠,黄娟. TC18钛合金等高温压缩过程的组织性能 [J].锻压技术,2017,42(1):111-115

Xu J, Xiao T Z, Huang J. Process optimization and numerical simulation of forging for large size TC4 forgings [J].Forging & Stamping Technology, 2017,42(1):111-115

[8]周伟, 曲恒磊, 赵永庆. 热处理对 TC4 合金组织与性能的影响[J] .热加工工艺, 2005, 34(8)：26-27.

Zhou W, Qu H L, Zhao Y Q. Effect of heat treatment on microstructure and mechanical properties of TC4 alloy[J].Hot Working Technology, 2005, 34(8)：26-27.

[9]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 in different microstructure states[J].Chinese Journal of Rare Metals，2012，36(4)：517-522.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】