2023.7,3(4)|材料装备技术与应用Ca及Ca‑Te处理对高硫非调质钢硫化物形态的影响王雅倩1,金国忠1,杨少朋1,2,汪开忠1,胡芳忠1,何孝雨1(1.马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000;2.钢铁研究总院特殊钢研究院,北京100080)摘要:切削加工性能是胀断连杆用非调质钢的关键性能指标,而硫化物形态与分布是影响切削性能的关键因素。研究了Ca处理和Ca⁃Te处理两种改质工艺对46MnVS5非调质钢硫化物形态与分布的影响。结果表明,Ca⁃Te处理有利于改善钢中硫化物形态与分布。Ca⁃Te处理后连铸坯宽度1/4处和心部夹杂物等效直径分别降低17.5%和23.9%,边部夹杂物密度由9.16个/mm2降低为7.39个/mm2。对轧材进行夹杂物评级,Ca⁃Te处理A细系由3.0级降低为2.0级,A粗系无明显变化。Ca⁃Te处理可以球化钢中的硫化物夹杂,减少夹杂物数量,提高钢的横向性能,改善钢的切削性能。关键词:胀断连杆用钢;46MnVS5;Ca⁃Te处理;硫化物EffectofCaandCa‑Tetreatmentonsulfidemorphologyofhighsulfurnon‑quenchedsteelWANGYaqian1,JINGuozhong1,YANGShaopeng1,2,WANGKaizhong1,HUFangzhong1,HEXiaoyu1(1.TechnologyCenter,MaanshanIron&SteelCo.,Ltd.,Maanshan243000,China;2.SpecialSteelResearchInstitute,IronandSteelResearchInstitute,Beijing100080,China)Abstract:Thecuttingperformanceisthekeyperformanceindexofnon-quenchedandtemperedsteel.Thesulfideformanddistributionarethekeyfactorsaffectingthecuttingperformance.TheeffectsofCatreatmentandCa-Tetreatmentonthemorphologyanddistributionofsulfidein46MnVS5non-quenchablesteelarestudiedinthispaper.TheresultsshowthatCa-Tetreatmentisbeneficialtoim⁃provethemorphologyanddistributionofsulfideinsteel.AfterCa-Tetreatment,theequivalentdiam⁃eterofinclusionsat1/4ofthewidthandatthecenterofthebilletdecreasesby17.5%and23.9%,re⁃spectively,andthedensityofinclusionsattheedgedecreasesfrom916/mm2to739/mm2.Inaddi⁃tion,Ca-TetreatmentoffinelineAdecreasesfrom3.0to2.0,andthereisnosignificantchangeincoarselineA.Keywords:steelforexpansionconnectingrod,46MnVS5;Ca-Tetreatment;sulfide引言连杆作为发动机的核心受力部件,通过与曲轴相互配合,将发动机活塞的往复运动转变为旋转运动,连杆的制造质量直接影响着发动机的性能和可靠...