Daye Special Steel Co., Ltd.

Mengdi Hu

Guanghui Liu

Zhou Zhang

Yinghua Lei

Lixin Zhou

Wenchao Zheng

Ruihai Hu

Zhanzhong Wang

Provided is steel for a wind power gear with improved purity and reliability. The chemical components thereof comprise, in percentages by mass: 0.15-0.19% of C, &#x2264;0.4% of Si, 0.5-0.7% of Mn, &#x2264;0.012% of P, &#x2264;0.006% of S, 1.5-1.8% of Cr, 0.28-0.35% of Mo, 1.4-1.7% of Ni, and 0.02-0.04% of Al, with the balance being Fe and inevitable impurities. A smelting method therefor comprises adding raw materials to a converter for primary melting, transferring same to a refining furnace for refining, carrying out continuous casting after vacuum degassing, and transferring same to a gas protection furnace for electroslag remelting. According to the present invention, a pure electroslag master batch is obtained by continuous casting, and the purity of the material is further improved by means of an electroslag remelting procedure; and the prepared steel material is used in a wind power gear, such that the flaw detection pass rate is significantly increased, large-particle inclusions in the steel material are significantly reduced, and the inclusions are fine and dispersed.

Steel for wind power gear with improved purity and reliability, and smelting method therefor

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Hubei, China

Mengdi Hu