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1. 发明授权

US6136109A Method of manufacturing high chromium martensite steel pipe having excellent pitting resistance 失效
标题翻译：具有优异耐点蚀性的高铬马氏体钢管的制造方法
公开(公告)号：US6136109A
公开(公告)日：2000-10-24
申请号：US181829
申请日：1998-10-28
申请人： Yukio Miyata , Mitsuo Kimura , Tomoya Koseki , Takaaki Toyooka , Fumio Murase
发明人： Yukio Miyata , Mitsuo Kimura , Tomoya Koseki , Takaaki Toyooka , Fumio Murase
IPC分类号： C21D1/18 , C21D6/00 , C21D8/10 , C21D9/08 , C22C38/00 , C22C38/42 , C22C38/58
CPC分类号： C21D8/105 , C21D6/002 , C21D9/08 , C22C38/001 , C22C38/42 , C22C38/58 , C21D1/18 , C21D2211/008 , C21D6/004
摘要： A high-Cr martensite steel pipe having excellent pitting resistance and method for manufacturing the same, which involves forming a pipe of steel including C: about 0.03 wt % or less, Si: about 0.5 wt % or less, Mn: about 0.5-3.0 wt %, Cr: about 10.0-14.0 wt %, Ni: about 0.2-2.0 wt %, Cu: about 0.2-1.0 wt % and N: about 0.03 wt % or less with the balance being Fe and incidental impurities, and having a value X shown as defined in the following formula (1) of about 12.2 or more. The pipe is quenched after austenitizing it at a temperature substantially equal to an A.sub.C3 point or higher, and the pipe is annealed in a temperature range from about 550.degree. C. or higher to a temperature lower than an A.sub.C1 point.value X=(Cr%)+3(Cu%)-3(C%) (1)The high-Cr martensite steel pipe made by this method exhibits excellent pitting resistance and overall surface corrosion resistance even in an environment containing a carbonic acid gas, and further exhibits excellent weldability and toughness in the welding-heat-affected zones.
摘要翻译：具有优异的耐点蚀性的高Cr马氏体钢管及其制造方法，其特征在于，包括形成C：约0.03重量％以下，Si：约0.5重量％以下，Mn：约0.5-3.0的钢管重量％，Cr：约10.0〜14.0重量％，Ni：约0.2〜2.0重量％，Cu：约0.2〜1.0重量％，N：约0.03重量％以下，余量为Fe及附带杂质，如下述式（1）所示的值X为约12.2以上。在基本上等于AC3点以上的温度奥氏体化后，管道淬火，管道在约550℃以上至低于AC1点的温度范围内进行退火。值X =（Cr ％）+ 3（Cu％）-3（C％）（1）通过该方法制造的高Cr马氏体钢管即使在含有碳酸气体的环境中也具有优异的耐点蚀性和整体表面耐腐蚀性，焊接热影响区的焊接性和韧性优良。

2. 发明授权

US5985209A Martensitic steel for line pipe having excellent corrosion resistance and weldability 失效
标题翻译：管线管马氏体钢具有优良的耐腐蚀性和焊接性
公开(公告)号：US5985209A
公开(公告)日：1999-11-16
申请号：US821512
申请日：1997-03-21
申请人： Mitsuo Kimura , Yukio Miyata , Tomoya Koseki , Takaaki Toyooka , Fumio Murase
发明人： Mitsuo Kimura , Yukio Miyata , Tomoya Koseki , Takaaki Toyooka , Fumio Murase
IPC分类号： C22C38/00 , C22C38/44 , C22C38/58 , C22C38/42
CPC分类号： C22C38/44
摘要： A martensitic steel for a line pipe having excellent corrosion resistance and weldability is disclosed. The martensitic steel contains about:0.02 wt % or less of C, 0.50 wt % or less of Si,0.2 to 3.0 wt % of Mn, 10 to 14 wt % of Cr,0.2 to 7.0 wt % of Ni, 0.2 to 5.0 wt % of Mo,0.1 wt % or less of Al, 0.07 wt % or less of N, andthe balance being Fe and incidental impurities; andthese elements satisfy substantially the following equations:(Cr %)+(Mo %)+0.1(N %)-3(C %).gtoreq.12.2,(Cr %)+3.5(Mo %)+10(N %)+0.2(Ni %)-20(C %).gtoreq.14.5, and150(C %)+100(N %)-(Ni %)-(Mn %).ltoreq.4.The martensitic steel may further contain at least one element selected from the group consisting ofabout 2.0 wt % or less of Cu, about 0.15 wt % or less of Ti, about 0.15 wt % or less of Zr, about 0.15 wt % or less of Ta andabout 0.006 wt % or less of Ca, andthese elements satisfy substantially the following equations:(Cr %)+(Mo %)+0.1(N %)+3(Cu %)-3(C %).gtoreq.12.2,(Cr %)+3.5(Mo %)+10(N %)+0.2(Ni %)-20(C %).gtoreq.14.5,150(C %)+100(N %)-(Ni %)-(Mn %).ltoreq.4.
摘要翻译：公开了一种具有优异的耐腐蚀性和焊接性的线管的马氏体钢。马氏体钢的含量为：0.02重量％以下的C，0.50重量％以下的Si，0.2〜3.0重量％的Mn，10〜14重量％的Cr，0.2〜7.0重量％的Ni，0.2〜5.0重量％的Mo，0.1重量％以下的Al，0.07重量％以下的N，余量为Fe和附带的杂质; 这些元素基本上满足以下等式：（Cr％）+（Mo％）+ 0.1（N％）-3（C％）> / = 12.2，（Cr％）+ 3.5（Mo％）+ 10（N％）+0.2（Ni％）-20（C％）> / = 14.5,150（C％）+ 100（N％） - （Ni％） - （Mn％）4。马氏体钢还可以含有选自Cu：2.0重量％以下，Ti：0.15重量％以下，Zr：0.15重量％以下，Zr：0.15重量％以下，0.15重量％以下 Ta和约0.006重量％以下的Ca，这些元素基本上满足以下等式：（Cr％）+（Mo％）+ 0.1（N％）+ 3（Cu％）-3（C％）> 12.2，（Cr％）+ 3.5（Mo％）+10（N％）+ 0.2（Ni％）-20（C％）> = 14.5,150（C％）+ 100（N％） - （Ni％） - （Mn％）

3. 发明授权

US5858128A High chromium martensitic steel pipe having excellent pitting resistance and method of manufacturing 失效
标题翻译：具有优异耐点蚀性的高铬马氏体钢管及其制造方法
公开(公告)号：US5858128A
公开(公告)日：1999-01-12
申请号：US634860
申请日：1996-04-19
申请人： Yukio Miyata , Mitsuo Kimura , Tomoya Koseki , Takaaki Toyooka , Fumio Murase
发明人： Yukio Miyata , Mitsuo Kimura , Tomoya Koseki , Takaaki Toyooka , Fumio Murase
IPC分类号： C21D1/18 , C21D6/00 , C21D8/10 , C21D9/08 , C22C38/00 , C22C38/42 , C22C38/58 , C22C38/18
CPC分类号： C21D8/105 , C21D6/002 , C21D9/08 , C22C38/001 , C22C38/42 , C22C38/58 , C21D1/18 , C21D2211/008 , C21D6/004
摘要： A high-Cr martensitic steel pipe having excellent pitting resistance and method for manufacturing the same, which involves forming a pipe of steel including C: about 0.03 wt % or less, Si: about 0.5 wt % or less, Mn: about 0.5-3.0 wt %, Cr: about 10.0-14.0 wt %, Ni: about 0.2-2.0 wt %, Cu: about 0.2-1.0 wt % and N: about 0.03 wt % or less with the balance being Fe and incidental impurities, and having a value X shown as defined in the following formula (1) of about 12.2 or more. The pipe is quenched after austenitizing it at a temperature substantially equal to an Ac.sub.3 point or higher, and the pipe is tempered in a temperature range from about 550.degree. C. or higher to a temperature lower than an Ac.sub.1 point.value X=(Cr %)+3(Cu %)-3(C %) (1)The high-Cr martensitic steel pipe made by this method exhibits excellent pitting resistance and general corrosion resistance even in an environment containing a carbonic acid gas, and further exhibits excellent weldability and toughness in the heat-affected zones.
摘要翻译：具有优异的耐点蚀性的高Cr马氏体钢管及其制造方法，其特征在于，包括形成C：约0.03重量％以下，Si：约0.5重量％以下，Mn：约0.5-3.0的钢管重量％，Cr：约10.0〜14.0重量％，Ni：约0.2〜2.0重量％，Cu：约0.2〜1.0重量％，N：约0.03重量％以下，余量为Fe及附带杂质，如下述式（1）所示的值X为约12.2以上。在基本等于Ac3点以上的温度奥氏体化之后，管道被淬火，并且在约550℃以上的温度范围内回火到低于Ac1点的温度。值X =（Cr ％）+ 3（Cu％）-3（C％）（1）通过该方法制造的高Cr马氏体钢管即使在含有碳酸气体的环境中也具有优异的耐点蚀性和一般的耐腐蚀性，并且还显示出优异的热影响区的焊接性和韧性。

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