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一種新型第三代單晶高溫合金WZ30組織與性能的研究
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作者單位:

1.中南大學(xué) 粉末冶金國家重點實驗室;2.深圳市萬澤中南研究院有限公司

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基金項目:

深圳市發(fā)展和改革委員會項目(SZDRC 20181000)；廣東省引進創(chuàng)新創(chuàng)業(yè)團隊項目(607264877417)；深圳市科技創(chuàng)新委員會項目(KQTD2015032716463668)


Microstructure and Properties of a Third Generation Single Crystal Superalloy WZ30
Author:
Affiliation:

Shenzhen Wedge Central South Research Institute Co., Ltd.

Fund Project:

Shenzhen Develpment and Reform Commission Project（SZDRC 20181000)；Guangdong Innovative&Entrepreneurial Research Team(607264877417);Shenzhen Peacock Plan(KQTD2015032716463668)

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    摘要:

    本文通過熱力學(xué)計算和實驗驗證優(yōu)化了W、Mo、Co、Cr、Al、Ta等元素在單晶高溫合金中的含量,設(shè)計了Re含量為5 wt%的新型單晶高溫合金WZ30,并與典型二代、三代單晶高溫合金進行了比較。結(jié)果表明,WZ30經(jīng)熱處理后獲得均勻的γ′相顯微組織,在760℃、980℃和1100℃下WZ30的屈服強度分別為938MPa、639MPa和436MPa,溫度高于1000℃時拉伸性能優(yōu)于二代單晶高溫合金。在980℃/250MPa和1100℃/137MPa實驗條件下,WZ30的持久壽命分別為642h和254h,持久壽命明顯優(yōu)于二代單晶高溫合金。WZ30的低周疲勞壽命在980℃下明顯優(yōu)于二代單晶高溫合金DD6。在高溫長時間循環(huán)氧化實驗中,WZ30顯示出較好的抗氧化性和組織穩(wěn)定性。

    Abstract:

    The content of W, Mo, Co, Cr, Al, Ta and other elements in the single crystal superalloy was optimized through experimental data and thermodynamic calculations.A new third-generation single crystal superalloy WZ30 with Re content of 5 wt% was designed. In this paper, the metallographic and mechanical properties of WZ30 are studied and analyzed, and compared with existing second-generation and third-generation single crystal superalloys. The results show that WZ30 has uniform microstructure after heat treatment. The yield strengths of WZ30 are 938MPa, 639MPa and 436MPa at 760℃, 980℃ and 1100℃ respectively. When the temperature is higher than 1000℃, the tensile performance of WZ30 is better than that of the second-generation single crystal superalloy. The creep rupture life is 642h at 980°C/250MPa; the creep rupture life is 254h at 1100℃/137MPa, which is significantly better than that of the second-generation single crystal superalloys. The low cycle fatigue life of WZ30 is better than the second-generation single crystal superalloy DD6 at 980℃. WZ30 alloy has better oxidation resistance and structural stability in high temperature cyclic oxidation experiments.

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引用本文

熊江英,龍安平,張建庭,王沖,張海,張高翔.一種新型第三代單晶高溫合金WZ30組織與性能的研究[J].稀有金屬材料與工程,2021,50(11):3995~4003.[XIONG JIANGYING, LONG ANPING, ZHANG JIANTING, WANG CHONG, ZHANG HAI, ZHANG GAOXIANG. Microstructure and Properties of a Third Generation Single Crystal Superalloy WZ30[J]. Rare Metal Materials and Engineering,2021,50(11):3995~4003.]
DOI：10.12442/j. issn.1002-185X.20200866

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  • 收稿日期:2020-11-10
  • 最后修改日期:2020-12-07
  • 錄用日期:2020-12-23
  • 在線發(fā)布日期: 2021-11-30
  • 出版日期: 2021-11-24