汽车齿轮用高品质20MnCr5(SH)钢生产工艺实践

High Quality 20MnCr5(SH) Steel Production Technology Practice

为了开发汽车齿轮用高品质20MnCr5(SH)钢材料,西宁特钢通过优化渣系配料结构,采用110t Consteel偏心底电炉留渣留钢控制,LF精炼成分精确控制,使用高碱度精炼渣系:50%~55%CaO,≤10%SiO2,22%~28%Al2O3,4%~7%Mg0以及延长极真空保持时间和弱氩搅拌时间等工艺,生产出化学成分稳定、淬透性带窄、高洁净度、晶粒细小均匀的20MnCr5(SH)齿轮用钢,能够满足高端汽车齿轮的需要。

In order to develop high quality 20 MnCr5(SH) material for automotive gears,Xining Special Steel adopted 110 tons Consteel eccentric bottom electric furnace slag-free tapping,precise control of refining composition and high basicity refining slag system:50%~55% CaO,≤10% SiO2,22%~28% Al2O-3,4%~7% MgO and sufficient extreme vacuum holding time and weak argon by optimizing the proportioning structure.The 20 MnCr5 gear steel with stable chemical composition,narrow hardenability band,high cleanliness and fine and uniform grain was produced by stirring time,which can fully meet the needs of high performance automobile gears.