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典型熱處理工藝對Ti40合金力學性能匹配關系的影響
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國家重點基礎研究發(fā)展計劃(“973”)項目(2007CB613807)


Matching Relationship between Effect of Typical Heat Treatments and Mechanical Properties of Ti40 Alloy
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    摘要:

    研究了2種典型的熱處理工藝（1#, 600 ℃, 4 h AC；2#, 850 ℃, 1 h WQ + 550 ℃, 6 h AC）條件下Ti40合金的組織、室溫拉伸性能、熱穩(wěn)定性能和蠕變性能。結果表明，2種工藝熱處理后微觀組織的差異主要在于晶界的影響，1#工藝熱處理后合金保留鍛造后的彎曲晶界，2#工藝熱處理后微觀組織的晶界清晰平直。對力學性能的測試結果表明，2種組織對室溫拉伸性能影響不大。相對于平直晶界，彎曲晶界有較好的熱穩(wěn)定性能和較低溫度的蠕變性能，而平直晶界高溫蠕變性能好

    Abstract:

    Based on previous research of Ti40 alloy two typical heat treatments were designed, e.g. 1#, 600 ℃, 4 h AC；2#, 850 ℃, 1 h WQ +550 ℃, 6 h AC. The microstructures , mechanical properties at room-temperature, thermal stability and creep properties of the alloy treated by the two heat treatments were tested. The result show that the difference of their microstructures is mainly in the respect of their grain boundary, e.g. the grain boundary of the alloy by 1# heat treatment is unsmooth and ragged and the ones by 2# heat treatment are smooth and straight. The mechanical properties indicated the difference of the microstructures leads a little effect on properties at room-temperature. Relatively speaking, the microstructure with the unsmooth grain boundary after 1# heat treatment brings good thermal stability and creep properties at lower temperature, and the microstructure with the straight boundary after 2# heat treatment brings good creep properties at higher temperature. The mechanism of the effect of different grain boundaries on thermal stability and creep properties was also discussed in this paper

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趙永慶,辛社偉,吳 歡,楊海瑛,李 倩.典型熱處理工藝對Ti40合金力學性能匹配關系的影響[J].稀有金屬材料與工程,2009,38(5):779~783.[Zhao Yongqing, Xin Shewei, Wu Huan, Yang Haiying, Li Qian. Matching Relationship between Effect of Typical Heat Treatments and Mechanical Properties of Ti40 Alloy[J]. Rare Metal Materials and Engineering,2009,38(5):779~783.]
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  • 收稿日期:2008-05-28
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