ISSN:1003-8620

CN:42-1243/TF

Governed by: CITIC Pacific Special Steel Group Co., LTD

Sponsored by: Daye Special Steel Co., LTD.

Special Steel ›› 2006, Vol. 27 ›› Issue (6): 61-62.

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Production of φ350 mm 17-4PH Stainless Steel Practice by EAF-VOD-2.5t ESR-Forging Flow Sheet

Ke  Qitang, Liu  Xuesheng, Chen  Changxi, Zhou  Conghui   

  1. Daye Special Steel Corp Ltd,Huangshi 435001
  • Received:2006-06-21 Online:2006-11-01 Published:2023-03-02

EAF-VOD-2.5t ESR-锻造流程生产Φ350mm 17-4PH不锈钢

柯其棠,柳学胜,陈长西,周丛惠   

  1. 大冶特殊钢股份有限公司,黄石435001
  • 作者简介:柯其棠(1968-),男,工程师,1991年华中理工大学毕业,高 合金锻造工艺研究。

Abstract: The  φ350  mm  heavy  forging products  of  17-4PH precipitation  hardening  stainless  steel  were produced by EAF-VOD  process  melting  and  pig  iron  mold  bottom  casting  φ320  mm  electrode  of  17-4PH  steel(≤0.04C,16.20~  16.50Cr,4.50~4.70Ni,3.30~3.40Cu,0.25~0.40Nb),then remelted  to 2.5 t(φ510~550mm)ESR  ingot and forged by 800 t hydraulic press or 5 t steam hammer. The process practice showed that it was available to avoid cracking of  the  steel  after  forging  by  controlling  end  forging  temperature(steam  hammer  980  ℃;hydraulic  press   1050℃), soaking  forged   φ350   mm    17-4PH   steel   products   in   cover-type   furnace(1130~1150℃),then   slow cooling   to(1050±10)℃   and  soaking,  fumnace  cooling  to  420℃,and  in  time  annealing  at  650℃.

Key words: 17-4PH Stainless Steel, EAF-VOD, ESR, Forging, φ350 mm Round Product

摘要: 采用EAF-VOD工艺冶炼17-4PH沉淀硬化不锈钢(%:≤0.04C、16.20~16.50Cr、4.50~4.70Ni、3.30~3.40Cu、0.25~0.40Nb),铁模下铸Φ320mm电极,并电渣重熔(ESR)成2.5t(Φ510~550mm)锭,经800t液压机或5t蒸汽锻锤生产17-4PH钢Φ350mm大规格锻材成品。工艺实践表明,控制停锻温度(蒸气锤980℃;液压机1050℃),将锻成的Φ350mm17-4PH钢成品材返回至室式加热炉(1130~1150℃)均热,缓冷至(1050±10)℃均热后,炉冷至420℃,并及时在650℃退火,有效地消除了该钢锻后炸裂现象。

关键词: 17-4 PH不锈钢, EAF-VOD, ESR, 锻造, φ350 mm 圆钢