退火对海绵钛/电解钛熔炼TC4合金铸锭轧制板材组织性能的影响

doi:10.13251/j.issn.0254-6051.2020.08.026

金属热处理 ›› 2020, Vol. 45 ›› Issue (8): 137-141.DOI: 10.13251/j.issn.0254-6051.2020.08.026

退火对海绵钛/电解钛熔炼TC4合金铸锭轧制板材组织性能的影响

谭聪^1,2, 范勇斌¹, 余堃¹, 肖寒², 张宏宇², 黄海广^1,2, 周荣锋²

1.云南钛业股份有限公司, 云南楚雄 651209;
2.昆明理工大学材料科学与工程学院, 云南昆明 650093

收稿日期:2020-01-30 出版日期:2020-08-25 发布日期:2020-09-07
通讯作者: 黄海广,高级工程师,硕士,E-mail:37178306@qq.com
作者简介:谭聪(1995—),男,硕士研究生,主要研究方向为钛合金成形,E-mail:1392054911@qq.com
基金资助:
云南省重大科技专项计划(2018ZE002);云南省技术创新人才计划(2017HB104);国家重点研发计划(2016YFB0301202)

Effect of annealing on microstructure and properties of TC4 alloy rolled sheet made from sponge titanium/electrolytic titanium

Tan Cong^1,2, Fan Yongbin¹, Yu Kun¹, Xiao Han², Zhang Hongyu², Huang Haiguang^1,2, Zhou Rongfeng²

1. Yunnan Titanium Industry Co. , Ltd. , Chuxiong Yunnan 651209, China;
2. School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650093, China

Received:2020-01-30 Online:2020-08-25 Published:2020-09-07

摘要/Abstract

摘要： 以海绵钛和电解钛分别作为熔炼TC4钛合金的原材料,将熔炼后的铸锭进行热轧并退火处理,研究不同原料铸锭轧制的TC4合金板材退火处理后的组织与力学性能。结果表明:去应力退火对电解钛与海绵钛TC4合金板材组织的影响不大。再结晶退火后,电解钛与海绵钛TC4合金板材均有再结晶的等轴α相,而电解钛TC4合金的等轴化程度更高,内部组织更均匀。海绵钛TC4合金板材在经550 ℃退火处理后的应力去除效果比电解钛TC4合金的好,其强度略微降低,而塑性提升更为明显。电解钛TC4合金板材在经过800 ℃退火处理后的再结晶效果比海绵钛TC4合金好,其强度略微降低,而塑性得到极大的提升。两种钛合金板材退火后板材的断裂方式皆为韧性断裂。海绵钛TC4合金板材经退火后硬度降低,而电解钛TC4合金板材经退火后硬度增加。

关键词: 海绵钛, 电解钛, TC4合金, 退火处理, 显微组织, 力学性能

Abstract: Sponge titanium and electrolytic titanium were used as raw materials for making TC4 titanium alloy. The smelted ingot was hot rolled and annealed to study the microstructure and mechanical properties after different raw material ingot rolling. The results show that the stress relief annealing has little effect on the microstructure of electrolytic titanium and titanium sponge TC4 alloy sheet. After recrystallization annealing, both the electrolytic titanium and the sponge titanium TC4 alloy plate have recrystallized, producing equiaxed α phase, while the electrolytic titanium TC4 alloy has a higher degree of equiaxification and a more uniform internal structure. The stress relief effect of the sponge titanium TC4 alloy sheet after annealing at 550 ℃ is better than that of the electrolytic titanium TC4 alloy, and its strength is slightly reduced, but the improvement of plasticity is more obvious. The recrystallization effect of electrolytic titanium TC4 alloy plate after annealing at 800 ℃ is better than that of sponge titanium TC4 alloy, its strength is slightly reduced, but the plasticity is greatly improved. The fracture mode of the two titanium alloy sheets after annealing is all ductile fracture. The hardness of the sponge titanium TC4 alloy plate is reduced after annealing, but the hardness of the electrolytic titanium TC4 alloy plate is increased after annealing.

Key words: sponge titanium, electrolytic titanium, TC4 alloy, annealing, microstructure, mechanical properties

中图分类号:

TG156.2

谭聪, 范勇斌, 余堃, 肖寒, 张宏宇, 黄海广, 周荣锋. 退火对海绵钛/电解钛熔炼TC4合金铸锭轧制板材组织性能的影响[J]. 金属热处理, 2020, 45(8): 137-141.

Tan Cong, Fan Yongbin, Yu Kun, Xiao Han, Zhang Hongyu, Huang Haiguang, Zhou Rongfeng. Effect of annealing on microstructure and properties of TC4 alloy rolled sheet made from sponge titanium/electrolytic titanium[J]. Heat Treatment of Metals, 2020, 45(8): 137-141.

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退火对海绵钛/电解钛熔炼TC4合金铸锭轧制板材组织性能的影响

Effect of annealing on microstructure and properties of TC4 alloy rolled sheet made from sponge titanium/electrolytic titanium

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