JP4687498B2 - 熱間電気抵抗溶接鋼管の製造方法 - Google Patents
熱間電気抵抗溶接鋼管の製造方法 Download PDFInfo
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- JP4687498B2 JP4687498B2 JP2006044236A JP2006044236A JP4687498B2 JP 4687498 B2 JP4687498 B2 JP 4687498B2 JP 2006044236 A JP2006044236 A JP 2006044236A JP 2006044236 A JP2006044236 A JP 2006044236A JP 4687498 B2 JP4687498 B2 JP 4687498B2
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- outer diameter
- steel pipe
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- 229910000831 Steel Inorganic materials 0.000 title claims description 53
- 239000010959 steel Substances 0.000 title claims description 53
- 238000004519 manufacturing process Methods 0.000 title claims description 22
- 230000009467 reduction Effects 0.000 claims description 55
- 238000005096 rolling process Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Description
帯鋼をロール成形したのち熱間電気抵抗溶接して母管を製造し、ついで当該母管を絞り圧延して外径が27.2mm〜42.7mmの熱間電気抵抗溶接鋼管を製造する方法において、
外径リダクションが62.6%以上70.6%以下、肉厚リダクションが20%以下であって、肉厚リダクション/外径リダクションが0.1以上で前記絞り圧延を行うことを最も主要な特徴としている。
本発明の電縫鋼管の製造方法を実施する造管、絞り圧延機配列を図1に示す。
これら比較例及び発明例における、内径寸法と、(肉厚最大値−肉厚最小値)/(内径最小値)を求めたものを下記表1に示すが、(肉厚最大値−肉厚最小値)/(内径最小値)は、比較例の場合は0.012〜0.014、発明例の場合は0.005〜0.006であった。
2 加熱炉
3 成形工程
4 溶接工程
5 絞り圧延機
6 電縫鋼管
Claims (1)
- 帯鋼をロール成形したのち熱間電気抵抗溶接して母管を製造し、ついで当該母管を絞り圧延して外径が27.2mm〜42.7mmの熱間電気抵抗溶接鋼管を製造する方法において、
外径リダクションが62.6%以上70.6%以下、肉厚リダクションが20%以下であって、肉厚リダクション/外径リダクションが0.1以上で前記絞り圧延を行うことにより、(肉厚最大値―肉厚最小値)/内径最小値が0.01以下の溶接鋼管を得ることを特徴とする熱間電気抵抗溶接鋼管の製造方法。
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JP2006044236A JP4687498B2 (ja) | 2006-02-21 | 2006-02-21 | 熱間電気抵抗溶接鋼管の製造方法 |
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JP2006044236A JP4687498B2 (ja) | 2006-02-21 | 2006-02-21 | 熱間電気抵抗溶接鋼管の製造方法 |
Publications (2)
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JP2007222881A JP2007222881A (ja) | 2007-09-06 |
JP4687498B2 true JP4687498B2 (ja) | 2011-05-25 |
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JP2006044236A Active JP4687498B2 (ja) | 2006-02-21 | 2006-02-21 | 熱間電気抵抗溶接鋼管の製造方法 |
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Families Citing this family (1)
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JP6332432B2 (ja) * | 2015-12-24 | 2018-05-30 | Jfeスチール株式会社 | 造管歪が小さい電縫鋼管の製造方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000096144A (ja) * | 1998-09-22 | 2000-04-04 | Kawasaki Steel Corp | 鋼管の製造方法 |
JP2002066609A (ja) * | 2000-08-31 | 2002-03-05 | Kawasaki Steel Corp | 管の絞り圧延方法 |
JP2004017066A (ja) * | 2002-06-13 | 2004-01-22 | Sumitomo Metal Ind Ltd | 管圧延機の肉厚制御方法 |
JP2004217992A (ja) * | 2003-01-14 | 2004-08-05 | Sumitomo Metal Ind Ltd | 電縫鋼管およびその製造方法 |
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2006
- 2006-02-21 JP JP2006044236A patent/JP4687498B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000096144A (ja) * | 1998-09-22 | 2000-04-04 | Kawasaki Steel Corp | 鋼管の製造方法 |
JP2002066609A (ja) * | 2000-08-31 | 2002-03-05 | Kawasaki Steel Corp | 管の絞り圧延方法 |
JP2004017066A (ja) * | 2002-06-13 | 2004-01-22 | Sumitomo Metal Ind Ltd | 管圧延機の肉厚制御方法 |
JP2004217992A (ja) * | 2003-01-14 | 2004-08-05 | Sumitomo Metal Ind Ltd | 電縫鋼管およびその製造方法 |
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