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1. 发明授权

US5716465A High-corrosion-resistant martensitic stainless steel having excellent weldability and process for producing the same 失效
标题翻译：具有优异焊接性的高耐腐蚀马氏体不锈钢及其制造方法
公开(公告)号：US5716465A
公开(公告)日：1998-02-10
申请号：US649701
申请日：1996-08-27
申请人： Takuya Hara , Asahi Hitoshi , Hiroshi Tamehiro , Taro Muraki , Akira Kawakami
发明人： Takuya Hara , Asahi Hitoshi , Hiroshi Tamehiro , Taro Muraki , Akira Kawakami
IPC分类号： C21D1/18 , C21D8/02 , C22C38/42
CPC分类号： C22C38/42 , C21D8/0205 , C21D1/18 , C21D2211/008
摘要： A high-corrosion-resistant martensitic stainless steel possessing excellent weldability and SSC resistance, having a tempered martensitic structure, characterized by comprising steel constituents satisfying by weight C: 0.005 to 0.035%, Si: not more than 0.50%, Mn: 0.1 to 1.0%, P: not more than 0.03%, S: not more than 0.005%, Mo: 1.0 to 3.0%, Cu: 1.0 to 4.0%, Ni: 1.5 to 5.0%, Al: not more than 0.06%, N: not more than 0.01%, and Cr satisfying a requirement represented by the formula 13>Cr+1.6Mo.gtoreq.8, C+N.gtoreq.0.03, 40C+34N+Ni+0.3Cu-1.1Cr-1.8 Mo.gtoreq.10, or further comprising at least one element selected from the group consisting of Ti: 0.05 to 0.1%, Zr: 0.01 to 0.2%, Ca: 0.001 to 0.02%, and REM: 0.003 to 0.4%, with the balance consisting essentially of Fe. A process for producing a martensitic stainless steel, comprising the steps of: subjecting a steel plate, produced by hot-rolling a stainless steel slab having the above composition, to austenitization at a temperature of Ac.sub.3 point to 1000.degree. C. to harden the steel plate; subjecting the hardened steel plate to final tempering at a temperature of 550.degree. C. to Ac.sub.1 point; and cold-rolling the steel plate.
摘要翻译： PCT No.PCT / JP95 / 01950 Sec。 371日期：1996年8月27日 102（e）日期1996年8月27日PCT提交1995年9月27日PCT公布。公开号WO96 / 10654 日期1996年4月11日具有回火马氏体组织的耐焊接性和耐SSC性优异的高耐腐蚀马氏体系不锈钢，其特征在于，含有C：0.005〜0.035％，Si：0.50％以下， Mn：0.1〜1.0％，P：0.03％以下S：0.005％以下，Mo：1.0〜3.0％，Cu：1.0〜4.0％，Ni：1.5〜5.0％，Al：0.06以下％，N：0.01以下，Cr满足式13> Cr + 1.6Mo> / = 8，C + N> = 0.03,40C + 34N + Ni + 0.3Cu-1.1Cr- 或者还包含选自Ti：0.05〜0.1％，Zr：0.01〜0.2％，Ca：0.001〜0.02％，REM：0.003〜0.4％的至少一种元素，与余量基本上由Fe组成。一种马氏体不锈钢的制造方法，其特征在于，包括以下步骤：将具有上述组成的不锈钢板进行热轧制成的钢板在Ac 3点〜1000℃的温度下进行奥氏体化，使钢盘子; 使淬火钢板在550℃至Ac1点的温度下进行最终回火; 并冷轧钢板。

2. 发明申请

US20100119860A1 STEEL PIPE EXCELLENT IN DEFORMATION CHARACTERISTICS AND METHOD OF PRODUCING THE SAME 有权
标题翻译：钢管在变形特性方面表现出色，其生产方法也是如此
公开(公告)号：US20100119860A1
公开(公告)日：2010-05-13
申请号：US12452765
申请日：2008-07-22
申请人： Asahi Hitoshi , Tetsuo Ishitsuka , Motofumi Koyuba , Toshiyuki Ogata
发明人： Asahi Hitoshi , Tetsuo Ishitsuka , Motofumi Koyuba , Toshiyuki Ogata
IPC分类号： B32B1/08 , C22C38/58 , C22C38/42 , C22C38/54 , C21D9/08 , C22C38/04
CPC分类号： C22C38/04 , C21D8/105 , C21D9/08 , Y10T428/12292
摘要： The invention provides a steel pipe excellent in deformation characteristics, most notably a steel pipe for expandable-pipe oil well and a low-yield-ratio line pipe, and a method of producing the same without conducting water cooling requiring large-scale heat treatment equipment, namely a method of producing a steel pipe excellent in deformation characteristics whose microstructure is a two-phase structure including a martensite-austenite constituent at an area fraction of 2 to 10% and a soft phase, which method comprises: heating at Ac1+10° C. to Ac1+60° C. and thereafter cooling a precursor steel pipe which contains, in mass %, C: 0.04 to 0.10% and Mn: 1.00 to 2.50%, is limited to Si: 0.80% or less, P: 0.03% or less, S: 0.01% or less, Al: 0.10% or less and N: 0.01% or less, further contains one or more of Ni: 1.00% or less, Mo: 0.60% or less, Cr: 1.00% or less and Cu: 1.00% or less, where content of Mn and content of one or more of Cr, Ni, Mo and Cu satisfy Mn+Cr+Ni+2Mo+Cu≧2.00, and a balance of iron and unavoidable impurities.
摘要翻译：本发明提供一种变形特性优异的钢管，特别是可膨胀管油管用钢管和低屈服比管线管，以及不进行需要大型热处理设备的水冷却的制造方法即具有优异的变形特性的钢管的制造方法，其特征在于微结构为包含2〜10％面积分数的马氏体 - 奥氏体组分和软相的两相组织，该方法包括：在Ac1 + 10 ℃至Ac1 + 60℃，然后将质量％C：0.04〜0.10％，Mn：1.00〜2.50％的前体钢管冷却至Si：0.80％以下，P： 0.03％以下，S：0.01％以下，Al：0.10％以下，N：0.01％以下，还含有Ni：1.00％以下，Mo：0.60％以下，Cr：1.00％以下，Cu：1.00％以下，其中，Cr，Ni，Mo，Cu中的一种以上的Mn含量满足Mn + Cr + Ni + 2Mo +Cu≥2.00，和铁和不可避免的杂质的平衡。

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