Transactions of Materials and Heat Treatment

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

Authors： Cui Wenjun Guo Bailan Cui Bin Wang Lianzhen Guo Jindou

Unit： Xi′an Saite Simai Titanium Industry Co. Ltd.

KeyWords： titanium alloy TC4 extrusiondrawing grain refinement microstructure mechanical properties work hardening

ClassificationCode：TG146.2+3

year,vol(issue):pagenumber：2017,42(10):166-169

Abstract：

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.

Funds：

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

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