摘要：對M152馬氏體熱強鋼開展鑄鋼丸噴丸強化研究，分析了不同強度的噴丸工藝對于M152馬氏體熱強鋼表面粗糙度、殘余應力場和室溫旋轉彎曲疲勞應力-周次曲線的影響。結果表明，當噴丸強度為0.2mmA時，表面平均粗糙度Ra達到Ra1.3μm,M152鋼殘余應力場深度達到150μm,最大殘余壓應力達到700MPa,光滑疲勞極限較未噴丸的原始試樣提高13%;當噴丸強度為0.1mmA時，表面平均粗糙度Ra僅為Ra0.9μm,M152鋼殘余應力場深度僅為90μm,最大殘余壓應力達到650MPa,疲勞極限與原始試樣相當。表面粗糙度并不能可靠評價噴丸實施效果，疲勞性能是評價噴丸強化效果的可靠指標。

　　關鍵詞：馬氏體熱強鋼、噴丸強化、殘余應力、疲勞性能

 Effect of shot peening on fatigue property of M152Martensitic Refractory Steel
Wang Xin¹, Tian Shuai¹, Zhong Ping¹, Tang Zhihui¹, Meng Zhenwei², Zhao Zhenye¹
1: Beijing institute of aeronautical material, Beijing 100095;
2: Shenyang Liming Aero-Engine (Group) Co., Ltd., Shenyang 110043

　　Abstract:M152 martensitic refractory steelwas employed to investigate the effect of shot-peening intensity on surface texture, residual stress profile and rotating-bending fatigue property. The results show the average roughness, the depth of residual stress profile, the maximum value of residual stress and the gain of fatigue limit （smooth specimens） are 1.3μm, 150μm, 700MPa and 13% respectively, when the shot-peening intensity is 0.2mmA. Moreover, when the shot-peening intensity is 0.1mmA, the average roughness, the depth of residual stress profile and the maximum value of residual stress are 0.9μm, 90μm, 650MPa,respectively, and the fatigue limit does not change from the original specimens. It means that fatigue property is a reliable indicator of the effect of shot peening, rather than surface roughness.

　　Key words: martensitic refractory steel, shot peening, residual stress, fatigue property

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