摘要
利用SEM、EDS、Q10M显微维氏硬度计、RtecMFT-5000多功能往复式摩擦试验机、白光干涉仪等设备研究了不同Ti含量的中碳高硅锰合金钢的微观组织、显微硬度、析出相成分和形貌等特征,并进行了耐磨性分析与磨损机制解析。结果表明:Ti的适量加入可以有效细化晶粒,但过量Ti(0.7wt.%)的加入会导致晶粒粗化,并且Ti加入量的不同会导致析出物种类、尺寸与形貌的变化;硬度与摩擦磨损试验对比发现,Ti的添加总体上降低了中碳高硅锰合金钢的硬度,其耐磨性能得以提升主要依赖于合金化后析出的微米级TiC、TiN颗粒硬质相,0.5wt.%的Ti添加量可有效降低中碳高硅锰合金钢的硬度,同时降低摩擦系数,提高耐磨性,这主要归因于晶粒细化强化与析出强化作用。
The microstructure,microhardness,precipitated phase composition and morphology of medium carbon high silicon manganese alloy steels with different Ti content were studied by means of SEM,EDS,Q10M micro-Vickers hardness tester,RtecMFT-5000 multi-function reciprocating friction testing machine and white light interferometer.The wear resistance and wear mechanism were analyzed.The results show that the appropriate addition of Ti can effectively refine the grain,but the addition of excessive Ti(0.7 wt.%)leads to grain coarsening,and the difference of Ti addition leads to the change of species,size and morphology.The comparison between hardness and friction and wear test shows that the addition of Ti generally reduces the hardness of medium-carbon high-silicon manganese alloy steel,and the improvement of its wear resistance mainly depends on the micron-grade TiC and TiN granular hard phases precipitated after alloying.The addition of 0.5wt.%Ti can effectively reduce the hardness of medium-carbon high-silicon manganese alloy steel,reduce the friction coefficient,and improve the wear resistance.This is mainly due to the effect of grain refinement and precipitation strengthening.
作者
杨康
王志英
郭云婷
田春健
杨帅
YANG Kang;WANG Zhi-ying;GUO Yun-ting;TIAN Chun-jian;YANG Shuai(College of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan114051,Liaoning,China;Collegeof Biological and Agricultural Engineering,Jilin University,Changchun 130025,Jilin,China)
出处
《铸造》
CAS
2024年第1期60-64,65-67,共8页
Foundry
基金
国家级大学生创新计划(No.202110146016)
国家自然科学基金青年基金项目(No.52205310)
山东省自然科学基金青年基金项目(No.ZR2021QE263)。
关键词
Ti合金化
耐磨钢
显微组织
硬度
耐磨性能
Ti alloying
wear-resistant steel
microstructure
hardness
wear-resistant properties
