ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2023, Vol. 44 ›› Issue (5): 39-42.DOI: 10.20057/j.1003-8620.2023-00015

所属专题: 电炉炼钢

• 产品研发 • 上一篇    下一篇

大功率风电主轴承用GCr15SiMn2轴承钢Φ800 mm锻材试制

陶士君, 肖爱平, 李旭, 余雷, 田浩, 刘月云, 罗文锦   

  1. 大冶特殊钢有限公司技术中心, 黄石435001
  • 收稿日期:2023-02-14 出版日期:2023-10-01 发布日期:2023-09-28
  • 作者简介:陶士君(1973―),男,本科,工程师;

Development of Φ800 mm Forging Bar for GCr15SiMn2 Bearing Steel Applied for High-power Wind Main Bearings

Tao Shijun, Xiao Aiping, Li Xu, Yu Lei, Tian Hao, Liu Yueyun, Luo Wenjing   

  1. Technology center, Daye Special Steel Co.,Ltd., Huangshi 435001 , China
  • Received:2023-02-14 Published:2023-10-01 Online:2023-09-28

摘要: 大冶特钢通过70 t电弧炉→LF→RH精炼→20 t模铸钢锭→锻造的工艺试制出直径ϕ800mm高碳铬轴承钢GCr15SiMn2大规格锻材,产品用于制作 5MW 及以上大功率风电机组主轴承。采用控制钢中残余元素 w[Ti]≤0.0016%、高碱度渣精炼[CaO(48%~55%)-SiO2 (3%~8%)-Al2O3(30%~40%)-MgO(4%~6%),碱度R≥6]、RH真空处理、保护浇注、合理的浇注工艺(浇注温度和速度)及两镦两拔锻造(综合锻造比≥4)等措施,钢材的低倍组织级别 1.0 级,钢中B细、D细、DS 类夹杂物均不大于 1.0 级,碳化物带状级别 CZ7. 5级,钢的淬透性J45mm 达到61.0HRC,各项性能均满足标准要求。

关键词: GCr15SiMn2 模铸锻材, 大功率风电主轴承, 高碳铬轴承钢, 模铸, 镦拔工艺

Abstract: Daye Special Steel trial-produced Ф800 mm diameter high carbon chromium bearing steel GCr15SiMn2 large specification forging material through the process of 70 t electric arc furnace +LF + RH refining-20 t die casting ingot-forging , the products are used to make ≥5MW high power wind turbine main bearings. By means such as controlling the residual elements [Ti]≤0.001 6%、high basicity slag refining [CaO(48%-55%)-SiO2(3%-8%)-Al2O3(30%-40%)-MgO(4%-6%), basicity R≥6], RH vacuum treatment,protective casting, reasonable pouring process (pouring temperature and speed) , two times upsetting and stretching process (comprehensive forging ratio ≥4) and other measures, it can meet the microstructure level of steel 1.0 class, the rating of inclusions for B fine, D fine and Ds in steel were 0.5-1.0 class, carbide banding level CZ7.5, the hardenability J45 mm reach 61.0HRC, all performance meet the standard requirements.

Key words: GCr15SiMn2 Die Casting and Forging, High-power Wind Main Bearings, High Carbon Chromium Bearing Steel, Casting Ingot, Upsetting and Stretching Process

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