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K417G高溫合金中Mn的存在形式和分布及Mn含量對(duì)高溫持久性能的影響
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1.中國(guó)科學(xué)院金屬研究所 師昌緒先進(jìn)材料創(chuàng)新中心，遼寧 沈陽(yáng) 110016;2.東北大學(xué)，遼寧 沈陽(yáng) 110819

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Existence Form and Distribution of Mn and the Effect of Mn Content on High-Temperature Stress Rupture Proper-ties of K417G Superalloy
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1.Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;2.Northeastern University, Shenyang 110819, China

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    摘要:

    研究了Mn含量在0.09%~0.35%（質(zhì)量分?jǐn)?shù)）范圍內(nèi)變化對(duì)K417G高溫合金的高溫持久性能的影響，并且探究了Mn的存在形式和分布情況。結(jié)果表明，Mn固溶于γ基體中，并偏聚于γ+γ'共晶帽前沿的γ'貧化區(qū)的基體中。Mn元素促進(jìn)了Al和Ti元素向枝晶間區(qū)域的偏析，從而增加了枝晶間區(qū)域γ+γ'共晶的體積分?jǐn)?shù)，減小了枝晶干中γ'相的尺寸。隨著Mn含量的增加，在950 ℃/235 MPa的條件下，合金的持久壽命和塑性均大大降低。Mn含量最小的合金具有最佳的高溫持久性能。

    Abstract:

    The high-temperature stress rupture properties of K417G superalloy with various Mn contents (0.09wt%~0.35wt%) were studied and the existence form and distribution of Mn were evaluated as well. The results show that Mn is solid-dissolved in γ matrix and enriched in γ'-depleted matrix in front of γ+γ' eutectic cap. Mn elements promote the segregation of Al and Ti to interdendrite zone, thus increasing the volume fraction of γ+γ' eutectic in interdendrite zone and decreasing the size of γ' phase in dendrite core. With the increase of Mn content, the stress rupture life and the plasticity decrease greatly under the condition of 950 °C/235 MPa. The alloy with the minimal Mn content shows the optimal high-temperature stress rupture properties.

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引用本文

楊亞倩,邢煒偉,陳偉亮,陳波,馬穎澈,劉奎.K417G高溫合金中Mn的存在形式和分布及Mn含量對(duì)高溫持久性能的影響[J].稀有金屬材料與工程,2021,50(10):3470~3476.[Yang Yaqian, Xing Weiwei, Chen Weiliang, Chen Bo, Ma Yingche, Liu Kui. Existence Form and Distribution of Mn and the Effect of Mn Content on High-Temperature Stress Rupture Proper-ties of K417G Superalloy[J]. Rare Metal Materials and Engineering,2021,50(10):3470~3476.]
DOI：10.12442/j. issn.1002-185X.20200623

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歷史
  • 收稿日期:2020-08-20
  • 最后修改日期:2020-09-01
  • 錄用日期:2020-09-21
  • 在線發(fā)布日期: 2021-10-28
  • 出版日期: 2021-10-25