摘要
为了研究适宜S280新型超高强度不锈钢的喷丸强化工艺,对S280钢进行不同工艺的喷丸强化,分析了S280钢及其不同工艺喷丸强化后的试样的表面形貌、粗糙度、旋转弯曲疲劳寿命以及疲劳断口形貌,测定了喷丸强化试样的残余应力场。结果表明:喷丸强化后S280钢疲劳寿命有了显著的提高,而大强度的铸钢丸喷丸对其疲劳寿命提高更为有利;喷丸前后的S280钢的疲劳裂纹源均在表面,但喷丸强化使疲劳裂纹由多源变为单源。
Shot peening of S280 steel was conducted under different processing conditions.Furthermore,the surface morphology,roughness,rotary bending fatigue life,and fatigue fractograph of the stainless steel specimens before and after shot peening were analyzed,and the residual stress field of the steel specimen after shot peening was measured.Results showed that shot peening helped to significantly improve the fatigue life of the stainless steel,and shot peening with cast steel balls under high intensity was more beneficial to the improvement of the fatigue life of the stainless steel.In the meantime,the fatigue crack sources were located on the surface of the stainless steel whether before or after shot peening,but shot peening changed multiple fatigue crack sources into single one.
出处
《材料保护》
CAS
CSCD
北大核心
2013年第7期16-18,6,共3页
Materials Protection
关键词
喷丸强化
S280超高强度不锈钢
疲劳性能
残余应力场
shot peening
S280 ultrahigh strength stainless steel
fatigue behavior
residual stress field
