文章信息/Info

Title:

Research Progress on the Hot Working of Hard-to-Deform Nickel-Based Superalloys for Turbine Disk Served Above 700 ℃

文章編號:

1674-3962(2024)10-0902-10

作者:

武金江; 趙廣迪; 王博; 姜昊源; 孫乙軒; 劉志超

遼寧科技大學(xué)材料與冶金學(xué)院，遼寧 鞍山114051

Author(s):

WU Jinjiang;  ZHAO Guangdi;  WANG Bo;  JIANG Haoyuan;  SUN Yixuan;  LIU Zhichao

School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China

關(guān)鍵詞:

鎳基變形高溫合金; 熱加工工藝; 本構(gòu)模型; 熱加工圖; 動態(tài)再結(jié)晶

Keywords:

nickel-based wrought superalloy;  hot working process;  constitutive model;  processing map;  dynamic recrystallization

分類號:

TG132.3

DOI:

10.7502/j.issn.1674-3962.202210002

文獻標志碼:

A

摘要:

航空發(fā)動機推重比的不斷提高對渦輪盤材料的高溫服役性能提出了更嚴苛的要求。服役溫度超過700 ℃的渦輪盤用鎳基變形高溫合金的合金化程度和γ′相含量極高，使其變形抗力大幅提高、熱塑性明顯下降、熱加工窗口變窄，在熱變形過程中很容易發(fā)生開裂和組織失穩(wěn)，給其渦輪盤的制備帶來了極大的困難。介紹了這類難變形鎳基高溫合金的熱加工工藝流程、摩擦和絕熱溫升修正及本構(gòu)模型和熱加工圖的構(gòu)建方法，綜述了典型難變形鎳基高溫合金Rene65、U720Li、ЭК151、ЭЛ975、TMW的熱變形行為研究進展。展望了這類變形高溫合金的研究方向，為其熱加工工藝優(yōu)化提供一定的參考。

Abstract:

The increasing thrust-weight ratio of aero-engines puts forward more stringent requirements for the high-temperature service performance of turbine disk alloys. The alloying degree and γ′ phase content of nickel-based wrought superalloys used in turbine disks with a service temperature of higher than 700 ℃ are extremely high, which significantly increases the deformation resistance, reduces the thermoplasticity and narrows the hot working window. Hence,cracking and structural instability are easy to occur during the hot deformation. This paper has introduced the hot working process of such hard-to-deform superalloys, corrections of friction and adiabatic heating effect, and construction methods of the constitutive model and processing map. Besides, the research progress on hot deformation behaviors of the typical hard-to�瞕eform superalloys, including Rene65, U720Li, ЭК151, ЭЛ975 and TMW has been reviewed. The future research direction of such alloys has been prospected, which can provide certain reference for optimization of the hot working process.