摘要
In this study,samples obtained from 1.3343 high-speed steel punches with TiN coatings were tested.The samples were subjected to heat treatment at different cryogenic temperatures(<196℃)and durations(12,24 and 36 h),followed by tempering at two different temperatures(200,500℃).For performance testing,a ball-on-disk wear test setup was utilized and a total of 6 groups of samples were examined.The effects of cryo-treatment and tempering on microstructure were revealed through microstructural analysis with scanning electron microscopy(SEM),X-ray(XRD diffraction),and Rietveld analysis.Additionally,the hardness of the punches was measured with microhardness measurements.The optimal wear resistance was observed in the 36 h deep cryo-treated and 200℃tempered samples.The characterization study indicates that by cryogenic treatment a significant portion of the retained austenite transformed into martensite and secondary carbides formed,resulting in improved wear resistance and a slight increase in hardness.
本研究测试了从1.3343高速钢冲头获得的Ti N涂层样品。在不同的低温(<196℃)和持续时间(12、24和36 h)下对样品进行热处理,然后在两种不同的温度(20℃、500℃)下进行回火。使用了球盘磨损试验装置进行性能测试,共测试了6组样品。通过扫描显微镜(SEM)、X射线(XRD衍射)和Rietveld分析对显微组织进行了分析,揭示了低温处理和退火对显微组织的影响。此外,还对冲头的硬度进行了显微硬度测试。在深冷处理36 h和200℃回火的条件下材料得到了最佳的耐磨性。结果表明,深冷处理将大量的残余奥氏体转变为马氏体,并形成了二次碳化物,提高了样品的耐磨性,并使其硬度略有增加。
基金
Project supported by the Haier Group
Project supported by the Eskisehir Osmangazi University,Türkiye。
作者简介
Corresponding author:Ferhat CERİTBİNMEZ,E-mail:f erhatceritbinmez@gmail.com,ORCID:https://orcid.org/0000-0002-5615-3124;Corresponding author:Fatih HayatiÇAKIR,E-mail:fcakir@ogu.edu.tr,ORCID:https://orcid.org/0000-0002-0873-5920。
