作者简介:张光鸿(1987-),男,工程师;E-mail:zhangguanghong@citicsteel.com;收稿日期:2022-09-22DOI:10.20057/j.1003-8620.2022-00068精密车削用16MnCrS5钢棒材生产工艺优化张光鸿1,2,龙开西1,2,何英武1,2,向鑫1,2(大冶特殊钢有限公司1棒材研究所;2高品质特殊钢湖北省重点实验室,黄石435001)摘要:通过试验确定精密车削用16MnCrS5棒材的生产工艺,研究合适的硫含量、冷却速度和退火温度参数,满足高端汽车销轴精密车削零件要求。结果表明,试验的S含量0.028%~0.035%的16MnCrS5热轧棒材以1.37~1.69℃/s冷却速度冷却后,再采用连续退火炉进行620℃×6h的去应力退火,可得到硬度满足180~215HBW的去应力退火精密车削用棒材。关键词:16MnCrS5钢;精密车削;硬度;硫含量;去应力退火OptimizationofProductionProcessof16MnCrS5SteelBarforPrecisionTurningZhangGuanghong1,2,LongKaixi1,2,HeYingwu1,2,XiangXin1,2(1BarResearchInstitute;2HubeiKeyLaboratoryofHighQualitySpecialSteel,DayeSpecialSteelCo.,Ltd.,Huangshi435001)Abstract:Throughexperiments,theproductionprocessof16MnCrS5steelbarsforprecisionturningisdetermined,andtheappropriatesulfurcontent,coolingspeedandannealingtemperatureparametersarestudiedtomeettherequirementsofhigh-endautomotivepinprecisionturningparts.Theresultsshowthatthetested16MnCrS5steelhot-rolledbarswithScon-tentrangingfrom0.028%to0.035%weracooledatacoolingrateof1.37to1.69℃/s,andthensubjectedtostressre-liefannealingat620℃for6hinacontinuousannealingfurnace,andthehardnesswas180-215HBWwhichmetcustomerrequirementsofthatforstressreliefannealingprecisionturningbar.KeyWords:16MnCrS5Steel;PrecisionTurning;Hardness;SulfurContents;StressReliefAnnealing16MnCrS5钢是从德国引进并通过合金元素Mn、Cr等实现钢的强韧化,属于低碳淬火钢,此钢中添加0.020%~0.040%的S元素,促进了钢中MnS夹杂物形成,具有易切削性能[1-2],广泛用于汽车齿轮、销轴等零部件。对于要求高精密车削汽车销轴用棒材交货硬度180~215HBW,一般热轧生产的16MnCrS5钢不能满足要求。开发初期生产验证热轧的16MnCrS5棒材(交货硬度≤255HBW)车加工不稳定,不仅零件精度不够,还出现缠屑、打刀等异常现象,不能满足生产要求。查阅相关文献资料经分析认为棒...