提出了超高强度钢“无应力集中”抗疲劳概念。喷丸、孔挤压、螺纹滚压等表面层组织再造改性造成的残余压应力和高位错密度胞状结构将裂纹推移至亚表面萌生并阻滞其扩展，回复不同应力集中处的疲劳强度至接近钢的固有疲劳强度，形成“无应力集中”表面完整性状态。“无应力集中”抗疲劳概念表述为构件表面形成完整的接近于钢固有疲劳强度的等疲劳强度包络。

A conception of “un-stressing concentration” anti-fatigue for ultra-high strength steel 300 M has been investigated. The compress stress field and cell structure with high density dislocation were formed in surface layer of specimens with the surface integrity machine, shot peening, hole extrusion and screw rolling strengthening, by which the crack initiation was changed to the subsurface from surface, crack propagation was thwarted, fatigue limit at the place of stress concentration were returned to a approximate to the innate fatigue limit of 300 M steel and “un-stressing concentration” surface integrity condition was resulted. This conception of “un-stressing concentration” anti-fatigue was described as a comprehensive equi-fatigue strength, which was equal approximately to the innate fatigue limit of 300M steel, encirclement on the constructure surface case.