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熱處理對Ti-5553鈦合金棒材組織與性能的影響
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Influences of Heat Treatments on the Microstructures and Properties of Large Diameter Ti-5553 Alloy Bars
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    摘要:

    研究了Ti-5553合金Φ300 mm大規(guī)格棒材在典型熱處理工藝條件下的微觀組織與力學性能。結果表明：Ti-5553合金的力學性能對固溶溫度非常敏感；在BASCA熱處理條件下Ti-5553合金斷裂韌性高達87.3 MPa×m1/2，強度也維持在1100 MPa左右；在820 ℃固溶并在580~620 ℃時效后，Ti-5553合金彌散分布著大量等軸初生a相顆粒和針狀次生a相，其相對體積分數(shù)決定了Ti-5553合金的強度和塑性匹配。

    Abstract:

    The microstructure and mechanical properties of Ti-5553 alloy bars with large diameter Φ300 mm were investigated. The result indicates that the influence of the solution temperature changes on mechanical properties is remarkable. When the Ti-5553 alloy is subjected to BASCA heat treatment, it reveals high damage-tolerant property including the fracture toughness up to 87.3 MPa·m1/2 and the strength up to 1100 MPa. After solution treatment at 820 oC and aging treatment from 580 to 620 oC, a large amount of primary equiaxial a phases and secondary acicular a phases distribute in the β matrix.?The mechanical properties of Ti-5553 alloy are determined by the relative volume fraction of primary a and secondary a phases.

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張豐收,賴運金,王凱旋,劉向宏,馮 勇,張平祥.熱處理對Ti-5553鈦合金棒材組織與性能的影響[J].稀有金屬材料與工程,2014,43(6):1507~1510.[Zhang Fengshou, LaiYunjin, Wang Kaixuan, Liu Xianghong, Feng Yong, Zhang Pingxiang. Influences of Heat Treatments on the Microstructures and Properties of Large Diameter Ti-5553 Alloy Bars[J]. Rare Metal Materials and Engineering,2014,43(6):1507~1510.]
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  • 收稿日期:2013-06-25
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  • 在線發(fā)布日期: 2014-11-13
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