谭 聪,肖 寒,张宏宇,黄海广,余 堃,周荣锋,李志敏.固溶时效对海绵钛/电解钛熔炼TC4钛合金热轧板材组织与性能的影响[J].稀有金属材料与工程,2020,49(12):4290~4296.[Tan cong,Xiao Han,Zhang Hongyu,Huang Haiguang,Yu Kun,Zhou Rongfeng,Li Zhimin.Effect of Solution and Aging Treatment on Microstructure and Properties of TC4 Titanium Alloy Hot-Rolled Sheet by Sponge Titanium /Electrolytic Titanium Melting[J].Rare Metal Materials and Engineering,2020,49(12):4290~4296.]
固溶时效对海绵钛/电解钛熔炼TC4钛合金热轧板材组织与性能的影响
投稿时间:2019-12-25  修订日期:2020-03-23
中文关键词:  海绵钛  电解钛  TC4  电子束冷床熔炼  固溶时效  显微组织  力学性能
基金项目:云南省重大科技专项计划 (2018ZE002);国家重点研发计划项目 (2016YFB0301202)
中文摘要:
      以海绵钛和电解钛作为熔炼TC4钛合金的原材料,采用工业化电子束冷床炉(EB炉)熔炼为扁锭并直接进行热轧,随后进行固溶时效处理,研究不同原材料铸锭和固溶时效处理工艺对TC4钛合金板材微观组织与性能的影响规律。结果表明:海绵钛TC4和电解钛TC4钛合金的α →β转变都是一个吸热过程,电解钛TC4钛合金α →β转变温度明显高于海绵钛TC4钛合金。海绵钛TC4钛合金在超过相变点温度进行固溶时效处理后,其组织为魏氏组织,其余固溶时效条件下的组织皆为双态组织。随固溶温度的升高,海绵钛TC4钛合金板材的抗拉强度先增加后降低,延伸率持续降低,而电解钛TC4钛合金板材的抗拉强度随固溶温度的升高而增加,延伸率一直降低。二者均在890℃保温30min固溶与550℃保温3h时效后获得最佳的综合力学性能。与海绵钛TC4钛合金板材相比,电解钛TC4钛合金板材在经过固溶时效处理后,材料的强度、硬度提升更为显著。
Effect of Solution and Aging Treatment on Microstructure and Properties of TC4 Titanium Alloy Hot-Rolled Sheet by Sponge Titanium /Electrolytic Titanium Melting
英文关键词:sponge titanium  electrolytic titanium  TC4  electron beam cold melting  solution aging treatment  microstructure  mechanical properties
英文摘要:
      In this paper, sponge titanium and electrolytic titanium are used as raw materials for melting TC4 titanium alloy. The smelted ingot is subjected to hot rolling and solution aging treatment. The microstructure and properties of TC4 titanium alloy sheet rolled from ingots of different raw materials after different solid solution aging treatments were studied. The results show that the α → β transition of sponge titanium TC4 and electrolytic titanium TC4 titanium alloys is an endothermic process. When the sponge titanium TC4 titanium alloy is solid-solved at a temperature exceeding the transformation point temperature, its structure is Weiss-structure, and the other structures under the solid-solution aging condition are all bimorphic. After solid solution aging treatment, the tensile strength of sponge titanium TC4 increased first and then decreased with the increase of the solution temperature, and the elongation continued to decrease. The tensile strength of electrolytic titanium TC4 increases with increasing solution temperature, while the elongation continues to decrease. Both of them obtained the best comprehensive mechanical properties after solid solution holding at 890℃ for 30min and 550℃ for 3h. Compared with sponge titanium TC4, the electrolytic titanium TC4 has a more significant increase in strength and hardness after solid solution aging treatment.
作者单位E-mail
谭 聪 昆明理工大学材料科学与工程学院 1392054911@qq.com 
肖 寒 昆明理工大学材料科学与工程学院 zztixh@163.com 
张宏宇 昆明理工大学材料科学与工程学院  
黄海广 昆明理工大学材料科学与工程学院  
余 堃 云南钛业股份有限公司  
周荣锋 昆明理工大学材料科学与工程学院  
李志敏 云南钛业股份有限公司  
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