-1 ~5s-1的條件下對熱等靜壓態(tài)TC4合金進(jìn)行降溫多道次熱壓縮實(shí)驗(yàn),總變形量為70%。熱等靜壓態(tài)TC4合金采用935℃+60min+水冷固溶處理,分別在520℃+4/6h+水冷和560℃+4/6h+水冷下進(jìn)行時(shí)效處理；多道次變形后熱等靜壓態(tài)TC4合金分別在945℃+60min+水冷進(jìn)行固溶處理和560℃+6h+水冷進(jìn)行時(shí)效處理。結(jié)果表明：熱等靜壓態(tài)試樣組織隨著時(shí)效溫度的升高,板條狀次生α相含量減少；而隨著時(shí)效時(shí)間變長,等軸α相逐漸增多,組織主要以次生條狀的α相與等軸α為主。多道次變形態(tài)試樣,在應(yīng)變速率為0.1s-1時(shí),合金經(jīng)過950→850℃降溫多道次變形后再通過固溶-時(shí)效處理,獲得了較為理想的三態(tài)組織。"/>

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熱處理對熱等靜壓態(tài)TC4合金降溫多道次變形微觀組織的影響
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中北大學(xué) 材料科學(xué)與工程學(xué)院 山西省 太原市 030051

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國家自然科學(xué)基金(51675492)


Effect of heat treatment on microstructure of hot isostatic pressedTC4 alloy under multi-pass deformation
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College of Materials Science and Engineering,North University of China

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    采用Gleeble-1500D熱模擬試驗(yàn)機(jī),在應(yīng)變速率0.001s-1 ~5s-1的條件下對熱等靜壓態(tài)TC4合金進(jìn)行降溫多道次熱壓縮實(shí)驗(yàn),總變形量為70%。熱等靜壓態(tài)TC4合金采用935℃+60min+水冷固溶處理,分別在520℃+4/6h+水冷和560℃+4/6h+水冷下進(jìn)行時(shí)效處理；多道次變形后熱等靜壓態(tài)TC4合金分別在945℃+60min+水冷進(jìn)行固溶處理和560℃+6h+水冷進(jìn)行時(shí)效處理。結(jié)果表明：熱等靜壓態(tài)試樣組織隨著時(shí)效溫度的升高,板條狀次生α相含量減少；而隨著時(shí)效時(shí)間變長,等軸α相逐漸增多,組織主要以次生條狀的α相與等軸α為主。多道次變形態(tài)試樣,在應(yīng)變速率為0.1s-1時(shí),合金經(jīng)過950→850℃降溫多道次變形后再通過固溶-時(shí)效處理,獲得了較為理想的三態(tài)組織。

    Abstract:

    The multi-pass thermal compression experiments of hot isostatic pressed TC4 titanium alloy were carried out on the Gleeble-1500D thermal simulator at strain rate of 0.001s-1~5s-1, the total deformation was 70%. The hot isostatic pressed TC4 titanium alloy was treated by 935℃+60 min+water quench solution treatment, and520℃+ 4/6h+water quench and 560+4/6h+water quench aging treatment, respectively. After multi-pass deformation, the samples were treated by solution treatment at 945℃ +60min+water quench and aging treatment at 560℃ +6h+water quench. The results show that the content of secondary α phase of hot isostatic pressed TC4 titanium alloy decreases with the increase of aging temperature, while the equiaxed α phase increases with the increase of aging time, and the microstructure mainly consists of secondary strip α phase and equiaxed α phase. Meanwhile, the ideal tri-modal microstructure(equiaxed α phase + secondary strip α phase + β transformation phase) of hot isostatic pressed TC4 titanium alloy can be obtained by solution and aging treatment during multi-pass deformation at the deformation temperature from 950℃ to 850℃and strain rate of 0.1s-1.

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張治民,劉海軍,任璐英,閆江鵬,王強(qiáng),薛勇.熱處理對熱等靜壓態(tài)TC4合金降溫多道次變形微觀組織的影響[J].稀有金屬材料與工程,2020,49(4):1372~1378.[Zhang Zhimin, Liu Haijun, Ren Luying, Yan Jiangpeng, Wang Qiang, Xue Yong. Effect of heat treatment on microstructure of hot isostatic pressedTC4 alloy under multi-pass deformation[J]. Rare Metal Materials and Engineering,2020,49(4):1372~1378.]
DOI：10.12442/j. issn.1002-185X.20190565

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  • 收稿日期:2019-07-05
  • 最后修改日期:2019-11-14
  • 錄用日期:2019-11-19
  • 在線發(fā)布日期: 2020-05-07
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