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高溫合金IN792組織與持久性能穩(wěn)定性研究
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國家重點基礎(chǔ)研究發(fā)展計劃項目 (2010CB631200, 2010CB631206)資助


Stability of Microstructure and Stress-rupture Properties of IN792 Superalloy
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    摘要:

    研究了700和900 ℃時效高溫合金IN792組織的演變規(guī)律和持久壽命的變化情況。700 ℃時，隨著時效時間延長，γ′和碳化物的形貌、尺寸與分布沒有發(fā)生變化；持久壽命保持穩(wěn)定。900 ℃時，時間延長，γ′發(fā)生粗化，并形成條狀；且在1007 h之后，條狀γ′的形態(tài)基本不變；但時效到2014 h時析出少量的針狀TCP相；與熱處理狀態(tài)相比 (61 h)，時效500 h時持久壽命下降到30 h，降低50%左右；時效到1007 h之后，直至2014 h，持久壽命不再隨時間延長而變化

    Abstract:

    The evolutions of microstructure and stress-rupture properties were investigated during aging at 700 and 900 ℃. With the increase of aging time at 700 ℃, the morphology, the size and the distribution of γ′ and carbides did not change, and the stress-rupture time was stable. During aging at 900 ℃, γ′ was coarsened to be worm-shaped. The worm-shaped microstructure was stable from 1007 h to 2014 h. The needle-like TCP phase was precipitated when the alloy was aged for 2014 h, but its content was very small. The stress-rupture time was only 30 h when the alloy was aged for 500 h. It was shortened by 50% in contrast to heat treated state. The stress-rupture time did not change from 1007 h to 2014 h

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楊金俠,鄭 啟,孫曉峰,胡壯麒.高溫合金IN792組織與持久性能穩(wěn)定性研究[J].稀有金屬材料與工程,2012,41(6):1038~1040.[Yang Jinxia, Zheng Qi, Sun Xiaofeng, Hu Zhuangqi. Stability of Microstructure and Stress-rupture Properties of IN792 Superalloy[J]. Rare Metal Materials and Engineering,2012,41(6):1038~1040.]
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  • 收稿日期:2011-06-15
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