铋含量对易切削钢组织与性能的影响研究  

Effect of bismuth content on the microstructure and properties of free cutting steels

作　　者：李彬周 王冬 王一甲 姜圆博 邵志保 李长生[3] Li Binzhou;Wang Dong;Wang Yijia;Jiang Yuanbo;Shao Zhibao;Li Changsheng(State Key Laboratory of Metal Materials for Marine Equipment and Application,Anshan 114009,Liaoning,China;Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102200,China;The State Key Lab of Rolling&Automation,Northeastern University,Shenyang 110819,Liaoning,China)

机构地区：[1]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114009 [2]鞍钢集团北京研究院有限公司,北京102200 [3]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《钢铁钒钛》2024年第2期190-197,共8页Iron Steel Vanadium Titanium

摘　　要：含铋环保型易切削钢具有广阔应用前景。通过制备铋锰铁合金将铋合金化,再在真空感应熔炼过程中将铋锰铁合金加入钢液,浇铸并热轧变形,获得三种含铋易切削钢。研究铋含量对钢中第二相、钢材力学性能和切削性能的影响。结果表明,随着铋含量由0.013%增加至0.069%,钢中MnS第二相的尺寸下降约45%,外形由杆状向球状转变;钢材的屈服强度、基体和第二相的硬度以及冲击功降低,抗拉强度小幅增加,延伸率大幅度提升,钢材的综合力学性能略有降低;切削试验表明,铋含量的增加,使铣削刀具的磨损显著减小,钢材表面平整度和光洁度增加,切屑由长带状向短螺旋状转变,碎断程度提高,切削性能显著改善。The bismuth-containing free-cutting steel served as an environment-friendly material has a broad application prospect.Bismuth was alloyed by preparing bismuth ferromanganese alloy,which was then added to the molten steel in the process of vacuum induction melting.After casting the melt and hot rolling,three kinds of bismuth-containing free cutting steels were obtained.The effect of bismuth content on the second phase,mechanical properties and cutting properties of steels was studied.With the increase of bismuth content from 0.013%to 0.069%,the size of MnS decreased by about 45%and the shape changed from rod to ball.The yield strength,the hardness of matrix and second phase,and the impact energy of the steels decreased.The tensile strength increased slightly,and the elongation of the experimental steel increased greatly.The comprehensive mechanical properties of the steel decreased slightly.The results of cutting experiments showed that with the increase of bismuth content,the wear of milling tools decreased significantly;the surface flatness and smoothness of the steels increased;the chip shapes changed from long strip to short spiral;the chip breakage degree was greater;and the cutting performance was significantly improved.

关 键 词：易切削钢 铋 硫化锰 切削性能 力学性能 

分 类 号：TF76[冶金工程—钢铁冶金]