零夹杂钢精炼的理论与工艺.pdf

2004’全宣真空冶▲与衰蕊工程学木研讨会套议论文纂 零夹杂钢精炼的理论与工艺 李正邦 (钢铁研究总院总工办，北京100081) 摘要：零夹杂钢即夹杂物高度弥散分、尺寸小予1pin的钢．论文从理论上分析其制备的可能性，展望其性 能．具体工艺措施为：经过预脱铝处理的超低S、P工业纯铁，在50kg真空瘢应炉中依靠硪氧脱氧反应进行初 脱氧、深脱氧和台金化处理，炼成42CrMo钢．最后在电子柬炉中经过两次置熔．得到全氧量为T．0．=4×10。‘ 的42CrMo锭．糟炼钢锻造成材后，非金属夹杂物非常细小用常规金相检睑(×100倍)很难定量评级．在扫描 电镜检测下发现有少量1～4fan的AlzO·夹杂，其主要来自铁合金原料。疲劳寿命由10’转效提高到109转数． 关键词：零夹杂钢I真空感应熔炼I真空电子束I熔 中围分类号；TGl46．4；TFl41+2文献标识码：A and of zeroinclusionsteel processrefining Theory LI Zheng-bang (CentralIronandSteelResearch 100081，China) Institute,Be讲ng in the Abstract：Thezeroinclusionsteelissuchasteelofwhichtheinclusionsmatrixare with inclusionsize highlydispersed than1 of zeroinclusionsteelisdiscussed withits re— less micron．The theoreticallypropertiesexpected．A possibilityrefining iron extra-lowand hasbeen processwastbexeforeconductedasfollows．Theingotcontaining sulfurphosphorus，which fining thesteel42CrMoina50 vacuum furnace of and withdealuminization．isrefinedinto induction wayprimary pretreated kg by deoxidizationscarbonand steelisremehedtwiceinavacuumelectron—beammelt— secondary using alloyingprocess．Then，the ofwhichthetotal content toobtain42CrMosteel oxygen T．O．一4×10一inwt．％．Afterforging ing(EBM)furnace ingots areso