Yang Xi, Wang Xinghe, Xie Jingpei, Li Yuhe, Yang Dixin
Guangdong Provincial Research Center for Sports Assistive Device Design Engineering and Technology, Guangzhou Sport University, Guangzhou 510500, China.
School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471000, China.
Materials (Basel). 2022 Jun 24;15(13):4448. doi: 10.3390/ma15134448.
The medium carbon-medium alloy steel was developed for the manufacture of large ball mill liners and sports equipment. In this study, the continuous cooling transformation curve of a novel type of medium carbon-medium alloy steel was measured with a thermal simulation machine; based on this curve, the hardening and tempering processes were optimized. The steel was then complex modified with alkaline earth and rare earth alloys. The mechanical properties of the treated steel were tested. The microstructure of the steel was analyzed by metallographic microscopy, X-ray diffraction, scanning electron microscopy and transmission electron microscopy, and the wear surface of the steel was analyzed by a three-dimensional morphometer. After high-temperature tempering, the microstructure transformed into tempered sorbite, which possesses good mechanical properties and can adapt to working conditions that require high strength and toughness. Rare earth or alkaline earth modification of the medium carbon-medium alloy steel promoted microstructural uniformity and grain refinement and improved the mechanical and anti-wear properties.
中碳中合金钢是为制造大型球磨机衬板和体育器材而研制的。在本研究中，利用热模拟机测定了一种新型中碳中合金钢的连续冷却转变曲线；基于该曲线，对淬火和回火工艺进行了优化。然后用碱土和稀土合金对该钢进行复合变质处理。测试了处理后钢的力学性能。通过金相显微镜、X射线衍射、扫描电子显微镜和透射电子显微镜分析了钢的微观组织，并通过三维形貌仪分析了钢的磨损表面。高温回火后，显微组织转变为回火索氏体，具有良好的力学性能，能适应要求高强度和韧性的工作条件。对中碳中合金钢进行稀土或碱土变质处理，促进了组织均匀性和晶粒细化，提高了力学性能和抗磨损性能。
