发明申请
- 专利标题: PROCESS FOR PRODUCING STAINLESS STEEL PIPE
- 专利标题(中): 生产不锈钢管的工艺
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申请号: US12247923申请日: 2008-10-08
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公开(公告)号: US20090064749A1公开(公告)日: 2009-03-12
- 发明人: YASUYOSHI HIDAKA , Satoshi Matsumoto , Toshihide Ono , Kouji Nakaike , Sumio Iida , Hiroshi Nogami
- 申请人: YASUYOSHI HIDAKA , Satoshi Matsumoto , Toshihide Ono , Kouji Nakaike , Sumio Iida , Hiroshi Nogami
- 申请人地址: JP Osaka-shi
- 专利权人: SUMITOMO METAL INDUSTRIES, LTD.
- 当前专利权人: SUMITOMO METAL INDUSTRIES, LTD.
- 当前专利权人地址: JP Osaka-shi
- 优先权: JP2006-126315 20060428
- 主分类号: B21B17/10
- IPC分类号: B21B17/10
摘要:
A process for stainless-steel pipe production which comprises piercing rolling a raw material stainless steel containing, by mass, Cr: 10-30%, to give a hollow shell, elongating rolling the hollow shell using a mandrel bar, together with a graphite-free lubricant, to give a finishing rolling blank pipe and heating the blank pipe in a reheating furnace and subjecting the same to finishing rolling by sizing rolling to produce a hot-finished pipe, and then subjecting this pipe as a mother pipe to cold working to produce a stainless-steel pipe. In the reheating furnace, the finishing rolling blank pipe is heated to 1000° C. or more and subjected to heating in which an oxidizing gas is blown into the pipe inside, whereby a stainless-steel pipe which is inhibited from forming a carburized layer in the pipe inner surface can be produced. When the finishing rolling by sizing rolling to give a cold working mother pipe is carried out by stretch reducer rolling at 860-1050° C., an annealing heat treatment of the mother pipe for cold working can be omitted. Thus, a stainless-steel pipe having excellent surface quality can be efficiently produced.
公开/授权文献
- US08047039B2 Process for producing stainless steel pipe 公开/授权日:2011-11-01
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