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不同熱處理的熱連軋GH4169合金組織及抗蠕變性能研究
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上海市重大基礎(chǔ)研究項(xiàng)目子課題（08dj1400405）


Effects of Different Heat Treatments on Microstructures and Creep Resistance of Hot Continuous Rolled GH4169 Alloy
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    摘要:

    研究了3種不同熱處理工藝下熱連軋GH4169合金的組織與抗蠕變性能。結(jié)果表明，3種不同的熱處理工藝對(duì)晶粒大小有一定的影響，DA態(tài)熱連軋 GH4169合金的組織最細(xì)小，HST態(tài)合金晶粒尺寸比ST態(tài)合金晶粒尺寸略大；δ相的含量隨固溶處理時(shí)間的增加而增加，且主要在晶界處析出。在650 ℃/725 MPa的實(shí)驗(yàn)條件下，DA態(tài)熱連軋 GH4169合金的抗蠕變性能最好，HST態(tài)合金抗蠕變性能最差。對(duì)3種不同熱處理工藝的熱連軋GH4169合金蠕變斷裂試樣的斷口進(jìn)行觀察，其斷裂方式主要表現(xiàn)為沿晶斷裂。

    Abstract:

    The effects of three different heat treatments on microstructures and creep resistance of hot continuous rolled (HCR) GH4169 alloy were investigated. It is found that different heat treatments have an effect on grain size of HCR GH4169 alloy. The grain size of the sample after DA treatment is the smallest and that of the sample after HST treatment is the biggest. The content of d-phase increases with the increasing of the time of the solution heat treatment, and it mainly precipitates at the grain boundary. Under 650 °C/725 MPa experimental conditions, the HCR GH4169 after DA heat treatment has powerful creep resistance and long life time, while the HCR GH4169 after HST heat treatment has short life time. The fracture mode of creep specimens after heat treatments is intergranular fracture.

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孔永華,劉瑞毅,王 飛,陳國(guó)勝,謝黎雄,朱世根.不同熱處理的熱連軋GH4169合金組織及抗蠕變性能研究[J].稀有金屬材料與工程,2013,42(4):829~832.[Kong Yonghua, Liu Ruiyi, Wang Fei, Chen Guosheng, Xie Lixiong, Zhu Shigen. Effects of Different Heat Treatments on Microstructures and Creep Resistance of Hot Continuous Rolled GH4169 Alloy[J]. Rare Metal Materials and Engineering,2013,42(4):829~832.]
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  • 收稿日期:2012-04-29
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