METHOD OF MANUFACTURING BILLET FOR HIGH CHROMIUM STEEL SEAMLESS PIPE
- 申请公布号：
- JP2002263798(A)
- 申请号：
- JP20010072324
- 申请日期：
- 2001.03.14
- 申请公布日期：
- 2002.09.17
- 申请人：
- SUMITOMO METAL IND LTD
- 发明人：
- UMEDA SHIGERU;KONDO TSUNEO;ADACHI MANABU
- 分类号：
- B22D11/00;B22D11/10;B22D11/124;B22D11/20;B22D11/22;(IPC1-7):B22D11/00
- 主分类号：
- B22D11/00
- 摘要：
- PROBLEM TO BE SOLVED: To enhance surface quality after bloming and to abate the occurrence of the inside surface flaw of a pipe during pipe making. SOLUTION: This method of manufacturing the billet for the high chromium seamless pipe comprises satisfying the following equation in the relation between the width and thickness of a slab in manufacturing the billet for the high chromium seamless pipe having a Cr concentration of >=5%: 6×slab thickness (m)}<2> <=slab width (m)<=12×slab thickness (m)}<2> . Accordingly, the manufacture of the billet for the high chromium seamless pipe which has the surface quality after bloming and abates the occurrence of the inside surface flaw of the pipe during pipe making is made possible.
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