文章信息/Info

Title:

Thermodynamic Analysis of Large-Size Oriented Cylindrical Hollow Turbine Blade Material DZ411G

文章編號:

1674-3962(2024)12-1145-08

作者:

鄧睿; 文新理; 張朝磊

1. 北京北冶功能材料有限公司，北京 100192 2. 北京科技大學 碳中和創新研究院，北京 100083

Author(s):

DENG Rui; WEN Xinli; ZHANG Chaolei

1.Beijing Beiye Functional Materials Corporation, Beijing 100192, China； 2. Beijing CTKM Harmonic Drive Co., Ltd., Beijing 100083, China

關鍵詞:

大尺寸; 定向柱晶; 空心透平葉片; DZ411G; 熱力學計算

Keywords:

large size;  oriented cylindrical;  hollow turbine blade;  DZ411G;  thermodynamic calculation

分類號:

TG111.3

DOI:

10.7502/j.issn.1674-3962.202302013

文獻標志碼:

A

摘要:

高溫合金由于其優異的綜合高溫性能被應用于航空發動機、燃氣輪機等熱端部件的制造，隨著裝備設計對材料服役溫度要求的日益提高，對高溫合金的綜合性能要求越來越嚴苛，具有更加優異性能的改型合金不斷誕生。以我國某新型重型燃氣輪機大尺寸定向柱晶空心透平葉片用改型合金DZ411G為研究對象，借助相圖計算軟件JmatPro，通過熱力學計算分析了C，Al，Ti，Cr，Ta等元素對主要合金相的開始析出溫度、最大析出量、固液相線、γ/γ′錯配度等的影響規律，為DZ411G合金化學成分優化、熔煉配入點設計及熱處理工藝制定提供了依據。根據理論計算結果，設計了合理的配入點，并首次完成了2.5 t DZ411G母合金的工業化生產。

Abstract:

High temperature alloy due to its excellent comprehensive high temperature performance is used in the manufacture of hot end parts of aircraft engines, gas turbines, etc., with the increasing requirements of equipment design for material service temperature, the comprehensive performance requirements of high temperature alloys are becoming more and more stringent, and modified alloys with better performance are constantly born. Taking the modified alloy DZ411G for large�瞫ize oriented cylindrical hollow blades of a new type of heavy-duty gas turbine in China as the research object, this paper analyzed the influence of C, Al, Ti, Cr, Ta and other elements on the initial precipitation temperature, maximum precipitation amount, solid-liquid phase line, γ/γ′ mismatch degree of the main alloy phases with the help of phase diagram calculation software JmatPro, and provided a basis for the optimization of chemical composition of DZ411G alloy, the design of smelting inlet point and the formulation of heat treatment process. According to the theoretical calculation results, a reasonable formula was formulated, and the industrial production of DZ411G alloy was completed for the first time.