表面技术2017，Vol.46Issue(9)：185-190,6.DOI:10.16490/j.cnki.issn.1001-3660.2017.09.029
超声表面滚压改善45#钢表层特性及疲劳性能的研究
Research on Surface Characteristics and Fatigue Properties of 45#Steel by Ultrasonic Surface Rolling
摘要
Abstract
To study the effect of surface characteristics and fatigue properties of 45#steel by ultrasonic surface rolling processed. The 45#steel was treated by USRP equipment, and the surface characteristics, state and microstructure of the before and after specimens were observed and analyzed by means of the corresponding measurement equipment. The fatigue properties of the specimens were measured by the rotary bending fatigue test, through the bruceton method to obtain the assessment of fa-tigue limits. After USRP treatment, the surface roughness Ra decreased from the previous 3.2 μm to 0.23 μm; grain refinement, the grain orientation tends to random distribution; the micro-hardness of the surface layer was about 56% higher than that of the heart; the thickness of the strengthening layer was up to 400 μm; the maximum residual compressive stress increased from -180 MPa to -532 MPa before the treatment and the fatigue limit of USRP specimens increased from 296 MPa to 403 MPa. Through USRP technology, the surface characteristics and surface properties of the 45#steel specimens were improved. The improvement of fatigue properties was mainly due to the combined effect of low surface roughness, grain refinement, the increase of the mi-crohardness and residual compressive stress.关键词
超声表面滚压/表层特性/微观结构/疲劳性能Key words
ultrasonic surface rolling/surface characteristics/micro-structure/fatigue properties分类
矿业与冶金引用本文复制引用
张飞,赵运才..超声表面滚压改善45#钢表层特性及疲劳性能的研究[J].表面技术,2017,46(9):185-190,6.基金项目
国家自然科学基金(51565017) （51565017）
江西省自然科学基金(2012BAB206026) （2012BAB206026）
江西省教育厅资助项目(GJJ14424) Supported by the National Natural Science Foundation of China(51565017), Jiangxi Province Natural Science Foundation of China (2012BAB206026), Science & Technology Plan Project of Jiangxi Province Education Department (GJJ14424) （GJJ14424）
