摘要
超声强化技术可用来改善材料表面完整性以提高其疲劳性能。本文针对超声滚压强化对低合金高强钢疲劳性能的影响进行研究,通过分析超声强化的强化机理及疲劳试样实验,采用金相显微镜、微观硬度仪及扫描电镜对30CrMnSiNi2A疲劳试样进行微观结构及显微硬度的测试,结果表明,经过超声强化后试样表面出现一层强化层,组织更为细密,显微维氏硬度与未表面强化的试样相比提高了9.8%。在1400 MPa应力作用下,30CrMnSiNi2A高强钢试样的疲劳寿命较传统抛光下的试样增加了38.4%。
Ultrasonic strengthening technology can be used to improve the surface integrity of materials in order to increase the fatigue life.The effect of the ultrasonic rolling strengthening on the fatigue property of high-strength steel was studied.Metallographic microscope,microhardness tester and scanning electron microscope were utilized to analyze microstructure and microhardness of the strengthened specimens,and the results showed that the strengthened layer can be obtained after ultrasonic strengthening treatment,and the microstructure become finer,the microhardness can be improved by 9.8%as well.At the same time,the fatigue life of the 30CrMnSiNi2A high-strength steel can be increased by 38.4%comparing with the polished specimens at a test stress of 1400 MPa.
作者
丛家慧
徐永臻
王磊
回丽
周松
CONG Jiahui;XU Yongzhen;WANG Lei;HUI Li;ZHOU Song(Department of Mechanical and Electrical Engineering,Shenyang Aerospace University,Shenyang 110136,China;Key Laboratory of Fundamental Science for National Defense of Aeronautical Digital Manufacturing Process,Shenyang 110136,China)
出处
《机械科学与技术》
CSCD
北大核心
2021年第3期470-474,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
东北大学航空动力装备振动及控制教育部重点实验室基金项目(VCAME201908)。
关键词
超声强化
高强钢
疲劳性能
ultrasonic strengthening
high-strength steel
fatigue property
