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1. WO2009004970 - PROCESS FOR PRODUCTION OF HIGH ALLOY STEEL PIPE

Publication Number WO/2009/004970
Publication Date 08.01.2009
International Application No. PCT/JP2008/061617
International Filing Date 26.06.2008
IPC
C21D 8/10 2006.01
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
10during manufacturing of tubular bodies
C22C 38/00 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
C22C 38/44 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
18containing chromium
40with nickel
44with molybdenum or tungsten
CPC
C21D 6/004
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
6Heat treatment of ferrous alloys
004containing Cr and Ni
C21D 8/10
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
10during manufacturing of tubular bodies
C21D 8/105
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
8Modifying the physical properties by deformation combined with, or followed by, heat treatment
10during manufacturing of tubular bodies
105of ferrous alloys
C21D 9/14
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
9Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
08for tubular bodies or pipes
14wear-resistant or pressure-resistant pipes
C22C 38/02
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
02containing silicon
C22C 38/04
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
CALLOYS
38Ferrous alloys, e.g. steel alloys
04containing manganese
Applicants
  • 住友金属工業株式会社 SUMITOMO METAL INDUSTRIES, LTD. [JP]/[JP] (AllExceptUS)
  • 相良 雅之 SAGARA, Masayuki [JP]/[JP] (UsOnly)
  • 諏訪部 均 SUWABE, Hitoshi [JP]/[JP] (UsOnly)
  • 天谷 尚 AMAYA, Hisashi [JP]/[JP] (UsOnly)
  • 木村 繁充 KIMURA, Shigemitsu [JP]/[JP] (UsOnly)
  • 五十嵐 正晃 IGARASHI, Masaaki [JP]/[JP] (UsOnly)
Inventors
  • 相良 雅之 SAGARA, Masayuki
  • 諏訪部 均 SUWABE, Hitoshi
  • 天谷 尚 AMAYA, Hisashi
  • 木村 繁充 KIMURA, Shigemitsu
  • 五十嵐 正晃 IGARASHI, Masaaki
Agents
  • 杉岡 幹二 SUGIOKA, Kanji
Priority Data
2007-17363802.07.2007JP
2008-01055721.01.2008JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) PROCESS FOR PRODUCTION OF HIGH ALLOY STEEL PIPE
(FR) PROCÉDÉ DE PRODUCTION DE TUYAU EN ACIER FORTEMENT ALLIÉ
(JA) 高合金管の製造方法
Abstract
(EN)
The invention provides a process for the production of a high alloy steel which permits pipe making by hot working and which exhibits satisfactory ductility in cold working conducted after pipe making for the purpose of attaining higher strength and is excellent in corrosion resistance. A process for the production of high alloy steel pipes by making a high alloy steel pipe stock having a chemical composition which contains by mass C: 0.03% or below, Si: 1.0% or below, Mn: 0.05 to 1.5%, P: 0.03% or below, S: 0.03% or below, Ni: more than 22% to 40%, Cr: 20 to 30%, Mo:0.01% to less than 4.0%, Cu: 0 to 4.0%, Al: 0.001 to 0.30%, N: more than 0.05% to 0.30%, and O: 0.010% or below with the balance consisting of Fe and impurities and in which the product of N content and O content satisfies the relationship (1) by hot working and then subjecting the pipe stock to cold working, characterized in that the final step of the cold working is conducted under such conditions that the reduction ratio (Rd) in terms reduction of sectional area satisfies the relationship (2), the pipe stock containing Ca, Mg and/or rare earth elements optionally: N × O ≤ 0.001 ... (1) 15 ≤ Rd(%) ≤ 370 × (C + N) ... (2) [wherein N, O and C represent their respective contents (% by mass) and Rd represents a reduction ratio (%) in terms of reduction of sectional area].
(FR)
L'invention propose un procédé de production d'un acier fortement allié qui permet de fabriquer des tuyaux par travail à chaud, présente une ductilité satisfaisante lors d'un travail à froid réalisé après une fabrication de tuyau pour atteindre une résistance plus élevée, et dont la résistance à la corrosion est excellente. L'invention concerne un procédé de production de tuyaux en acier fortement allié par la réalisation d'un matériau de tuyau en acier fortement allié dont une composition chimique contient, en masse: C: 0,03% ou moins; Si: 1,0% ou moins; Mn: 0,05 à 1,5%; P: 0,03% ou moins; S: 0,03% ou moins; Ni: plus de 22% à 40%; Cr: 20 à 30%; Mo: 0,01% à moins de 4,0%; Cu: 0 à 4,0%; Al: 0,001 à 0,30%; N: plus de 0,05% à 0,30%; et O: 0,010% ou moins. Le reste est constitué de Fe et d'impuretés. Le produit de la teneur en N ou de la teneur en O satisfait la relation (1), par travail à chaud, puis par travail à froid, le procédé étant caractérisé en ce que l'étape finale du travail à froid est réalisée dans des conditions telles que le rapport de réduction (Rd) en termes de réduction de section satisfait la relation (2). Le matériau de tuyau contient Ca, Mg et/ou, facultativement, des éléments de terres rares: N × O ≤ 0,001 ... (1) 15 ≤ Rd (%) ≤ 370 × (C + N) ... (2) [N, O et C représentant leurs teneurs respectives (% en masse) et Rd représentant un rapport de réduction (%) en termes de réduction de section].
(JA)
熱間加工による製管が可能であって、製管後にさらに高強度を得るために冷間加工を行う際に十分な延性を有するとともに耐食性にも優れる高合金の製造方法を提供する。 質量%で、C:0.03%以下、Si:1.0%以下、Mn:0.05~1.5%、P:0.03%以下、S:0.03%以下、Ni:22%を超えて40%以下、Cr:20~30%、Mo:0.01%以上4.0%未満、Cu:0~4.0%、Al:0.001~0.30%、N:0.05%を超えて0.30%以下、O:0.010%以下を含有し、残部がFe および不純物であり、かつ、N 含有量とO 含有量の積が下記(1)式を満足する化学組成を有する高合金素管を熱間加工により形成した後、冷間加工によって高合金管を製造する方法であって、最終の冷間加工工程を断面減少率での加工度Rd が下記(2)式を満足する条件で冷間加工することを特徴とする高合金管の製造方法。Ca、Mg および希土類元素を含有してもよい。 N×O≦0.001 ・・・(1) 15≦Rd(%)≦370×(C+N)・・・(2) 但し、式中のN、O 及びC はそれぞれの元素の含有量(質量%)を意味し、そして、Rd は断面減少率での加工度(%)を意味する。  
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