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熱處理制度對(duì)Ti555211合金組織和性能的影響
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1.西北工業(yè)大學(xué)，陜西 西安 710072;2.西部超導(dǎo)材料科技股份有限公司，陜西 西安 710018

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Effect of Heat Treatment Process on Microstructure and Mechanical Property of Ti555211 Titanium Alloy
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1.Northwestern Polytechnical University , Xi 'an 710072, China;2.Western Superconducting Technologies Co., Ltd, Xi 'an 710018, China

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    摘要:

    研究了一種新型近β鈦合金（Ti555211），該合金具有優(yōu)異的塑性加工能力、高比強(qiáng)度以及優(yōu)良的綜合性能，在航天航空及化工領(lǐng)域上有廣泛的應(yīng)用。通過3×3正交試驗(yàn)，研究了兩階段不同處理（固溶溫度、失效溫服、時(shí)效時(shí)間）對(duì)Ti555211鈦合金力學(xué)性能和顯微組織的影響。結(jié)果表明，隨著固溶溫度的升高和時(shí)效溫度的降低，合金強(qiáng)度提高。延伸率隨著固溶溫度的降低和時(shí)效溫度的升高而增大。經(jīng)820 ℃/2 h空冷和580 ℃/12 h空冷處理后，合金具有較好的強(qiáng)塑性，抗拉伸強(qiáng)度達(dá)到1333 MPa，較同類合金強(qiáng)度指標(biāo)（1080 MPa）高出20%；延伸率為12%，較同類合金塑性指標(biāo)（5%）高出140%。

    Abstract:

    A new type of near-β titanium alloy (Ti555211) was investigated. This alloy has excellent plasticity, high specific strength, and excellent comprehensive properties, which is widely used in the aerospace and chemistry industries. Through the 3×3 orthogonal experiments, the influences of different stages of two-step annealing treatment (solution temperature, aging temperature, aging time) on the mechanical properties and microstructures of Ti555211 titanium alloy were investigated. Results show that with increasing the solution temperature and decreasing the aging temperature, the alloy strength is increased. The elongation is increased with decreasing the solution temperature and increasing the aging temperature. After treatment of 820 °C/2 h/air cooling and 580 °C/12 h/air cooling, the alloy has better plasticity, and its tensile strength reaches 1333 MPa, which is higher than the strength index (1080 MPa) of similar alloys by 20%. The elongation of the Ti555211 titanium alloy is 12%, which is higher than the plasticity index (5%) of similar alloys by 140%.

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高玉社,薛祥義,劉向宏,高慧賢,王建國(guó),杜予晅.熱處理制度對(duì)Ti555211合金組織和性能的影響[J].稀有金屬材料與工程,2024,53(2):371~376.[Gao Yushe, Xue Xiangyi, Liu Xianghong, Gao Huixian, Wang Jianguo, Du Yuxuan. Effect of Heat Treatment Process on Microstructure and Mechanical Property of Ti555211 Titanium Alloy[J]. Rare Metal Materials and Engineering,2024,53(2):371~376.]
DOI：10.12442/j. issn.1002-185X.20230450

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歷史
  • 收稿日期:2023-07-20
  • 最后修改日期:2024-01-04
  • 錄用日期:2024-01-05
  • 在線發(fā)布日期: 2024-02-27
  • 出版日期: 2024-02-23