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1.发明授权公开(公告)号：US09050681B2
公开(公告)日：2015-06-09
申请号：US12449812
申请日：2008-02-29
申请人： Hideki Hamatani , Shinji Kodama , Nobuo Mizuhashi , Sunao Takeuchi , Tomohiro Nakaji , Takashi Miyakawa , Hitoshi Asahi , Michitoshi Tanimoto , Michimasa Mukai
发明人： Hideki Hamatani , Shinji Kodama , Nobuo Mizuhashi , Sunao Takeuchi , Tomohiro Nakaji , Takashi Miyakawa , Hitoshi Asahi , Michitoshi Tanimoto , Michimasa Mukai
CPC分类号： B23K13/00 , B23K10/00 , B23K11/0873 , B23K11/16 , B23K11/34 , B23K11/36 , B23K13/06 , B23K28/02 , B23K2101/06 , B23K2101/10 , B23K2101/18 , B23K2103/04 , Y10T428/12292
摘要： The present invention provides a method of production of electric resistance welded steel pipe able to stably reduce weld defects due to oxides by firing plasma and furthermore able to reduce plasma jet noise and comprises shaping steel plate 1 into a tube and electric resistance welding the abutting end faces 4 during which blowing on at least the abutting end faces 4a in the region 6 at the welding upstream side from the weld point 9 where the temperature becomes 650° C. or more a reducing high temperature (pseudo) laminar plasma obtained by applying voltage to a reducing gas containing H2 gas: 2 to 50 vol % to which is added a balance of Ar gas alone or a mixed gas of Ar gas to which N2 gas, He gas, or both are added. At that time, it is preferable to make the applied voltage over 120V and the make the plasma blowing conditions satisfy the following formula (1). 150
摘要翻译： 本发明提供一种电阻焊钢管的制造方法，其能够通过点火等离子体稳定地减少由于氧化物引起的焊接缺陷，并且还能够降低等离子体射流噪声，并且包括将钢板1成形为管，并且将邻接端 至少在熔点为熔点高于650℃的焊接点的焊接上游侧的区域6中的至少碰撞端面4a或更多的是通过施加电压而获得的还原高温（伪）层流等离子体 涉及含有H2气体的还原气体：2〜50体积％，添加余量的Ar气体或添加有N 2气体，He气体或二者的Ar气体的混合气体。 此时，优选使施加电压超过120V，使等离子体吹送条件满足下式（1）。 150 <4×（ΣG iM i）＆pgr; ×D×μava，T = 7000 <400 <1>
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2.发明申请公开(公告)号：US20100104888A1
公开(公告)日：2010-04-29
申请号：US12449812
申请日：2008-02-29
申请人： Hideki Hamatani , Shinji Kodama , Nobuo Mizuhashi , Sunao Takeuchi , Tomohiro Nakaji , Takashi Miyakawa , Hitoshi Asahi , Michitoshi Tanimoto , Michimasa Mukai
发明人： Hideki Hamatani , Shinji Kodama , Nobuo Mizuhashi , Sunao Takeuchi , Tomohiro Nakaji , Takashi Miyakawa , Hitoshi Asahi , Michitoshi Tanimoto , Michimasa Mukai
CPC分类号： B23K13/00 , B23K10/00 , B23K11/0873 , B23K11/16 , B23K11/34 , B23K11/36 , B23K13/06 , B23K28/02 , B23K2101/06 , B23K2101/10 , B23K2101/18 , B23K2103/04 , Y10T428/12292
摘要： The present invention provides a method of production of electric resistance welded steel pipe able to stably reduce weld defects due to oxides by firing plasma and furthermore able to reduce plasma jet noise and comprises shaping steel plate 1 into a tube and electric resistance welding the abutting end faces 4 during which blowing on at least the abutting end faces 4a in the region 6 at the welding upstream side from the weld point 9 where the temperature becomes 650° C. or more a reducing high temperature (pseudo) laminar plasma obtained by applying voltage to a reducing gas containing H2 gas: 2 to 50 vol % to which is added a balance of Ar gas alone or a mixed gas of Ar gas to which N2 gas, He gas, or both are added. At that time, it is preferable to make the applied voltage over 120V and the make the plasma blowing conditions satisfy the following formula (1). 150
摘要翻译： 本发明提供一种电阻焊钢管的制造方法，其能够通过点火等离子体稳定地减少由于氧化物引起的焊接缺陷，并且还能够降低等离子体射流噪声，并且包括将钢板1成形为管，并且将邻接端 至少在熔点为熔点高于650℃的焊接点的焊接上游侧的区域6中的至少碰撞端面4a或更多的是通过施加电压而获得的还原高温（伪）层流等离子体 涉及含有H2气体的还原气体：2〜50体积％，添加余量的Ar气体或添加有N 2气体，He气体或二者的Ar气体的混合气体。 此时，优选使施加电压超过120V，使等离子体吹送条件满足下式（1）。 150 <4×（ΣG i M i）＆pgr; ×D×μava，T = 7000 <400 <1>
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