表面爆炸处理后的ZGMn13Cr2钢的冲击磨损性能及硬化机理  

Impact Wear and Hardening Mechanism of Explosion Hardening of ZGMn13Cr2 Steel Surface

作　　者：巴奇楠 宋仁伯[1] 冯一帆[1] 李论 BA Qinan;SONG Renbo;FENG Yifan;LI Lun(School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083;East Anshan Sintering Plant,Anshan Steel Group Corporation Limited,Anshan 114041)

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]鞍山钢铁集团有限公司东鞍山烧结厂,鞍山114041

出　　处：《材料导报》2019年第10期1712-1716,共5页Materials Reports

摘　　要：对ZGMn13Cr2钢表面进行一次爆炸处理,测量其冲击磨损性能,观察不同硬化层的显微组织,分析其硬化机理。实验结果表明:经爆炸处理后的ZGMn13Cr2钢硬度随硬化深度的增加而降低,耐磨性提高了1.32～1.41倍,磨损形貌以犁沟、剥落坑为主,还有少量破碎坑;通过对不同硬化深度的实验用钢表面进行显微表征,发现硬化层内产生了大量的形变孪晶,爆炸表面具有高密度位错的畴界,距爆炸表面10 mm处有泰勒晶格以及距爆炸表面20 mm处出现大量平行的滑移带和滑移带交割,未观察到马氏体组织,仍以基体奥氏体为主,这说明一次爆炸处理的ZGMn13Cr2钢的硬化机理为孪晶硬化和位错硬化的复合机制。The surface of ZGMn13Cr2 steel was subjected to an explosion treatment,its impact wear performance and microstructure with different har-dening depths were observed,and the hardening mechanism was analyzed.The results indicate that the hardness of ZGMn13Cr2 steel after explosion treatment decreased with the increase of hardening depth,and the wear resistance is improved by 1.32-1.41 times.Its worn surfaces consist of peeling pits,grooves and a small amount of broken pits.A large number of the deformation twins(hardened layer),domain boundary with high density dislocations(explosion surface),Taylor lattice(10 mm from explosion surface)and parallel slip bands and the intersections of slip bands(20 mm from explosion surface)were observed in the test steel surface with different hardening depths,but there was no martensite,the austenite matrix was mainly observed.Therefore,hardening mechanism of ZGMn13Cr2 steel is mainly dislocation hardening and twins hardening.

关 键 词：爆炸处理 ZGMn13Cr2钢 硬化机理 形变孪晶 位错 冲击磨损 

分 类 号：TG145[一般工业技术—材料科学与工程]