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介绍了抚顺特殊钢公司通过快锻工艺制造Φ400~700mm大规格风电轴承钢的生产实践。通过控制钢中残余元素、VD精练结束前高拉铝、采用保护气氛浇注、使用保护气氛电渣炉生产及墩拔锻造工艺等,使渗碳轴承钢G20Cr2Ni4A的w(Ti)≤0.003%,w(Al)为0.015%~0.050%,w(O)≤0.001 5%,w(Sn)≤0.03%,w(As)≤0.04%,w(Sb)≤0.015%,w(Pb)≤0.02%,w(Ca)≤0.001%,w(Bi)≤0.02%,且钢中夹杂物及低倍组织处于较好水平,渗碳轴承钢晶粒度、性能、探伤等指标完全适合风电轴承套圈的使用要求。
This paper introduces the production practice of Fushun Special Steel Co., Ltd. to manufacture Φ400 ~ 700mm large size wind turbine bearing steel by rapid forging process. By controlling the residual elements in the steel, VD aluminum refining before the end of high aluminum, the use of protective atmosphere casting, the use of protective atmosphere electroslag furnace production and pier forging process, so carburizing bearing steel G20Cr2Ni4A w (Ti) ≤ 0.003%, w (Al) is 0.015% to 0.050%, w (O) is less than 0.001%, w is less than 0.03%, w is less than 0.04%, w is less than or equal to 0.015% , w (Ca) ≤0.001%, w (Bi) ≤0.02%, and the inclusions and low magnification of the steel are in a good level. The grain size, performance and flaw detection of the carburized bearing steel are completely suitable for the wind bearing rings The use of requirements.