42CrMo钢M-F双相组织接触疲劳-多冲疲劳及弯曲疲劳性能研究-何柏林.pdfVIP

DO I :10.16579/j .issn.1001.9669.2004.04.017 Journal of Mechanical Strength 机械强度 2004, 26(4):431～ 435 42CrMo M+F 、 STUDY ON CONTACT, IMPACT AND BENDING FATIGUE LIFE OF 42CrMo STEEL WITH M+F DUAL-PHASE STRUCTURE 1 1 1 2 　 　　 　　 (1.华东交通大学 机电工程学院, 南昌330013) (2.河南科技大学 材料科学与工程学院, 洛阳471003) 1 1 1 2 HE BoLin 　LI ShuZhen 　YU YingXia 　SHAO ErYu (1.School of Mechanical and Electrical Engineering, East China Jiaotong University , Nanchang 330013, China) (2.Institute of Materials Science and Engineering, Henan University of Science and Technology , Luoyang 471003, China) 　42CrMo +(M+F), 0%、3%、10%、 15 %20%。 、, 。 , M+F 、、 M 。 , 。 , (10%), 。 　　　　　 　TG115.57 　TG144 Abstract　M+F dual-phase structures were gained through subcritical quenching in 42CrMo steel.The amount o undissolved er- rite were 0 %, 3%, 10%, 15 % and 20 %, respectively.The e ect o undissolved errite amount on contact, impact and bending atigue properties w ere studied.The stress relaxation and grain re inement due to occurring o plastic de ormation are main reasons o improving the atigue li e.The experimental results show that the contact, impact and bending atigue li e o M+F dual-phase structure is longer than that o mono-martensite structure.The contact, impact and bending atigue li e elongates w ith the increase o amounts o undissolved errite be ore the amount o undissolved errite reaches 10%.Under the experiment conditions, when the amount o undissolved errite is 10 %, the contact, impact and bending atigue li e w ill be the longest. Ke words　Contac