摘要
综述了几种原始组织的材料表面形变强化的有效性,讨论了三个主要因素的作用和相互关系。可以认为,表面形变强化的有效性是马氏体大于索氏体,缺口件大于光滑件,滚压大于喷丸;滚压使马氏体40Cr钢的缺口疲劳极限显著提高,甚至超过光滑疲劳极限,这主要归因于高的残余压应力的有益作用。并对表面形变强化的选材依据提出了建议。
This review attempts to discuss the effectuality of surface plastic deformation strengthening treatment and the role of main influential factors for different original microstructure of steels. It can be concluded that the effectuality of surface plastic deformation strengthening treatment of martensite is greater than that of sorbite, and effect of notched specimen is larger than that of smooth specimen, surface rolling larger than shot peening. After surface rolling the notch fatigue limit of martensite was increased remarkably and exceeded its smooth fatigue limit in 40Cr steel. This effectuality can be mainly attributable to the beneficial action of high compressive residual stresses. A criterion to select materials for surface plastic deformation treatment is also discussed in this paper.
出处
《机械工程材料》
CAS
CSCD
北大核心
2003年第10期1-3,39,共4页
Materials For Mechanical Engineering
关键词
表面塑性变形
表面强化
疲劳性能
残余应力
surface plastic deformation
surface strengthening
fatigue property
residual stress
