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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Ke Qitang, Liu Xuesheng, Chen Changxi, Zhou Conghui
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柯其棠,柳学胜,陈长西,周丛惠
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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
Ke Qitang, Liu Xuesheng, Chen Changxi, Zhou Conghui. Production of φ350 mm 17-4PH Stainless Steel Practice by EAF-VOD-2.5t ESR-Forging Flow Sheet[J]. Special Steel, 2006, 27(6): 61-62.
柯其棠, 柳学胜, 陈长西, 周丛惠. EAF-VOD-2.5t ESR-锻造流程生产Φ350mm 17-4PH不锈钢[J]. 特殊钢, 2006, 27(6): 61-62.
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https://www.specialsteeljournal.com/EN/Y2006/V27/I6/61