熱機載荷下GH4169G車削-噴丸加工表面完整性的演化機理

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關鍵詞：高溫合金GH4169G；車削-噴丸復合加工；服役環(huán)境;表面完整性演化中圖分類號：V216.8DOI：10.3969/j.issn.1004-132X.2025.04.015 開放科學（資源服務）標識碼（OSID）：

Evolution Mechanism of Surface Integrity of GH4169G Turning-shot Peening under Thermal and Mechanical Loads

HE Zhe1LI Jiale1SHI Kaining1FAN Yuchang3HUANG Xinchun2* 1.Key Laboratory of High Performance Manufacturing for Aero Engine（Ministry of Industry and Information Technology），Northwestern Polytechnical University，Xi'an，710072 2.Office of Science and Technology，Northwestern Polytechnical University，Xi'an，710072 3.Zhijian Laboratory，Rocket Force University of Engineering，Xi'an，710025

Abstract： A study of the evolution mechanism of surface integrity of turning-shot peening composite machining under service load conditions was carried out for the nickel-based superalloys GH4169G for aero-engines. The forms of thermal，mechanical，and thermo-mechanical loads on surface integrity were analyzed by simulating thermo-mechanical load tests under service environments. The thermo-mechanical loading model for surface integrity control and the residual stress and microhardness evolution model with cosine function control factor were established. The laws of residual stress relaxation under thermo-mechanical loading and the laws of microhardness changes and surface microstructure changes were mastered. The results provide basic data for mastering the evolution of surface integrity of nickel-based superalloys processed under service environments. The surface integrity control processes were further optimized.

Key words： superalloy GH4169G；combined turning and shot peening；service environment； evolution of surface integrity

0 引言

GH4169是一種沉淀強化鎳基高溫合金，在650°C 下的屈服強度居變形高溫合金首位，具有良好的高溫抗輻射、抗氧化和抗腐蝕性，以及較高的高溫疲勞強度和斷裂塑性及韌性[1-2]。（剩余15629字）