WO2002018666A1 - Acier inoxydable martensitique a faible teneur en carbone et son procede de production - Google Patents

Acier inoxydable martensitique a faible teneur en carbone et son procede de production Download PDF

Info

Publication number: WO2002018666A1
Authority: WO; WIPO (PCT)
Prior art keywords: stainless steel; low carbon; martensitic stainless; less; carbon martensitic
Prior art date: 2000-08-31

Application number

PCT/JP2001/007564

Other languages

English (en)

French (fr)

Inventor

Yoshihiro Ozaki

Toshimitsu Nagaya

Atsushi Miyazaki

Susumu Satoh

Mineo Muraki

Setsuo Kakihara

Toshihiro Kasamo

Original Assignee

Kawasaki Steel Corporation

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

2000-08-31

Filing date

2001-08-31

Publication date

2002-03-07

2001-08-31 Application filed by Kawasaki Steel Corporation filed Critical Kawasaki Steel Corporation

2001-08-31 Priority to CN018148921A priority Critical patent/CN1697889B/zh

2001-08-31 Priority to US10/344,535 priority patent/US6884388B2/en

2001-08-31 Priority to KR1020037003130A priority patent/KR100765661B1/ko

2001-08-31 Priority to EP01961278A priority patent/EP1314791B1/en

2002-03-07 Publication of WO2002018666A1 publication Critical patent/WO2002018666A1/ja

Links

OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract 3
229910052799 carbon Inorganic materials 0.000 title abstract 3
229910001105 martensitic stainless steel Inorganic materials 0.000 title abstract 3
238000004519 manufacturing process Methods 0.000 title 1
239000012535 impurity Substances 0.000 abstract 1
238000005496 tempering Methods 0.000 abstract 1

Classifications

- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Materials Engineering (AREA)
Mechanical Engineering (AREA)
Metallurgy (AREA)
Organic Chemistry (AREA)
Heat Treatment Of Sheet Steel (AREA)
Heat Treatment Of Steel (AREA)
Braking Arrangements (AREA)

PCT/JP2001/007564 2000-08-31 2001-08-31 Acier inoxydable martensitique a faible teneur en carbone et son procede de production WO2002018666A1 (fr)

Priority Applications (4)

Application Number	Priority Date	Filing Date	Title
CN018148921A CN1697889B (zh)	2000-08-31	2001-08-31	低碳马氏体不锈钢板及其制造方法
US10/344,535 US6884388B2 (en)	2000-08-31	2001-08-31	Low carbon martensitic stainless steel and method for production thereof
KR1020037003130A KR100765661B1 (ko)	2000-08-31	2001-08-31	저탄소 마르텐사이트계 스테인레스 강판 및 이의 제조방법
EP01961278A EP1314791B1 (en)	2000-08-31	2001-08-31	Low carbon martensitic stainless steel and method for production thereof

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
JP2000263595		2000-08-31
JP2000-263595		2000-08-31
JP2000-263594		2000-08-31
JP2000263594		2000-08-31

Publications (1)

Publication Number	Publication Date
WO2002018666A1 true WO2002018666A1 (fr)	2002-03-07

Family

ID=26598968

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
PCT/JP2001/007564 WO2002018666A1 (fr)	2000-08-31	2001-08-31	Acier inoxydable martensitique a faible teneur en carbone et son procede de production

Country Status (5)

Country	Link
US (1)	US6884388B2 (ja)
EP (1)	EP1314791B1 (ja)
KR (1)	KR100765661B1 (ja)
CN (2)	CN1697889B (ja)
WO (1)	WO2002018666A1 (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1403394A1 (en) *	2002-09-27	2004-03-31	Nisshin Steel Co., Ltd.	Deflection-resistant stainless steel-made structural members of a two-wheeled vehicle
WO2004097058A1 (ja) *	2003-04-28	2004-11-11	Jfe Steel Corporation	ディスクブレーキ用マルテンサイト系ステンレス鋼
US6890393B2 (en)	2003-02-07	2005-05-10	Advanced Steel Technology, Llc	Fine-grained martensitic stainless steel and method thereof
JP2005133204A (ja) *	2003-10-08	2005-05-26	Jfe Steel Kk	耐焼戻し軟化性に優れるブレーキディスクおよびその製造方法
US6899773B2 (en)	2003-02-07	2005-05-31	Advanced Steel Technology, Llc	Fine-grained martensitic stainless steel and method thereof
WO2010140696A1 (ja)	2009-06-01	2010-12-09	Ｊｆｅスチール株式会社	ブレーキディスク用鋼板およびブレーキディスク

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GB2368849B (en) *	2000-11-14	2005-01-05	Res Inst Ind Science & Tech	Martensitic stainless steel having high mechanical strength and corrosion resistance
US6793744B1 (en)	2000-11-15	2004-09-21	Research Institute Of Industrial Science & Technology	Martenstic stainless steel having high mechanical strength and corrosion
FR2872825B1 (fr) *	2004-07-12	2007-04-27	Industeel Creusot	Acier inoxydable martensitique pour moules et carcasses de moules d'injection
CN100510140C (zh) *	2004-12-07	2009-07-08	住友金属工业株式会社	油井用马氏体系不锈钢管
US8852361B2 (en) *	2005-03-17	2014-10-07	Jfe Steel Corporation	Stainless steel sheet with excellent heat and corrosion resistances for brake disk
EP2719789B1 (en) *	2006-10-05	2019-07-03	JFE Steel Corporation	Brake discs excellent in resistance to temper softening and toughness
US8333849B2 (en) *	2008-04-25	2012-12-18	Jfe Steel Corporation	Low-carbon martensitic chromium-containing steel
US8075420B2 (en) *	2009-06-24	2011-12-13	Acushnet Company	Hardened golf club head
BRPI0904608A2 (pt) *	2009-11-17	2013-07-02	Villares Metals Sa	aÇo inoxidÁvel para moldes com menor quantidade de ferrita delta
CA2799696C (en) *	2010-05-31	2015-11-17	Jfe Steel Corporation	Structural stainless steel sheet having excellent corrosion resistance at weld and method for manufacturing same
EP2623226A4 (en) *	2010-09-30	2017-11-01	Kabushiki Kaisha Kobe Seiko Sho	Press-molded article and method for producing same
CN107964632B (zh) *	2012-09-24	2021-01-22	杰富意钢铁株式会社	成型加工性优异的铁素体系不锈钢板
US9523402B2 (en)	2013-02-08	2016-12-20	Nippon Steel & Sumikin Stainless Steel Corporation	Stainless steel brake disc and method for production thereof
CN105189801A (zh) *	2013-03-19	2015-12-23	杰富意钢铁株式会社	不锈钢板
CN103556070B (zh) *	2013-10-31	2015-07-22	万宝力不锈钢制品（东莞）有限公司	一种高耐磨不锈钢咖啡壶材料及其制备方法
WO2015064128A1 (ja)	2013-10-31	2015-05-07	Ｊｆｅスチール株式会社	低温靭性に優れたフェライト−マルテンサイト２相ステンレス鋼およびその製造方法
CN103882321B (zh) *	2014-02-21	2016-08-17	芜湖市鸿坤汽车零部件有限公司	一种低碳不锈钢材料及其制备方法
JP6128291B2 (ja)	2015-04-21	2017-05-17	Ｊｆｅスチール株式会社	マルテンサイト系ステンレス鋼
CN104878301B (zh) *	2015-05-15	2017-05-03	河冶科技股份有限公司	喷射成形高速钢
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CN108779530B (zh) *	2016-04-12	2021-03-09	杰富意钢铁株式会社	马氏体系不锈钢板
CN105908101B (zh) *	2016-07-08	2018-04-03	四川西南不锈钢有限责任公司	一种超低碳氮钢及制备方法
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CN106399829B (zh) *	2016-10-13	2018-03-23	天津钢管集团股份有限公司	高强高韧耐腐蚀马氏体不锈钢油井管及其制造方法
CN106591736B (zh) *	2016-12-13	2018-08-21	山西太钢不锈钢股份有限公司	高强低铬不锈钢及其热处理方法
CZ308041B6 (cs) *	2018-05-18	2019-11-13	Univerzita J. E. Purkyně V Ústí Nad Labem	Způsob zušlechťování nízkouhlíkových bórových ocelí
EP4006177B1 (en) *	2019-07-24	2024-02-28	Nippon Steel Corporation	Martensitic stainless steel pipe and method of manufacturing martensitic stainless steel pipe
CN112921246A (zh) *	2019-12-06	2021-06-08	湖南荣威煤机制造有限公司	一种矿山机械用耐磨钢板的制备方法
JP6821097B1 (ja) *	2019-12-19	2021-01-27	日鉄ステンレス株式会社	冷間加工性に優れる高硬度・高耐食性用途のマルテンサイト系ステンレス鋼及びその製造方法
WO2022041207A1 (zh) *	2020-08-31	2022-03-03	北京科技大学	一种高温高强低碳马氏体热强钢及其制备方法
CN115679194B (zh) *	2021-07-30	2023-09-12	宝山钢铁股份有限公司	一种塑料模具钢板及其制造方法
CN113957333A (zh) *	2021-09-10	2022-01-21	安徽强兴精锻有限公司	一种球销座用马氏体不锈钢及其锻造工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH06306482A (ja) *	1993-04-22	1994-11-01	Nippon Steel Corp	マルテンサイト系ステンレス鋼線材および同線材加工製品の熱処理方法
JP2000026941A (ja) *	1998-05-08	2000-01-25	Nippon Steel Corp	耐食性に優れたディスクブレ―キ用マルテンサイト系ステンレス鋼
JP2000109956A (ja) *	1998-10-05	2000-04-18	Daido Steel Co Ltd	高温耐摩耗性の優れたステンレス鋼
JP2001003141A (ja) *	1999-06-22	2001-01-09	Nippon Steel Corp	ディスクブレーキ用マルテンサイト系ステンレス鋼
EP1106705A1 (en)	1999-11-30	2001-06-13	Nippon Steel Corporation	Stainless steel for brake disc excellent in resistance to temper softening
JP2001192779A (ja) *	2000-01-07	2001-07-17	Nippon Steel Corp	ディスクブレーキ用マルテンサイト系ステンレス鋼

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
AU6364796A (en) *	1995-07-07	1997-02-10	Highveld Steel & Vanadium Corporation Limited	A steel

2001
- 2001-08-31 EP EP01961278A patent/EP1314791B1/en not_active Expired - Lifetime
- 2001-08-31 CN CN018148921A patent/CN1697889B/zh not_active Expired - Fee Related
- 2001-08-31 CN CN2010101708620A patent/CN101906587B/zh not_active Expired - Fee Related
- 2001-08-31 US US10/344,535 patent/US6884388B2/en not_active Expired - Lifetime
- 2001-08-31 WO PCT/JP2001/007564 patent/WO2002018666A1/ja active Application Filing
- 2001-08-31 KR KR1020037003130A patent/KR100765661B1/ko not_active Expired - Fee Related

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH06306482A (ja) *	1993-04-22	1994-11-01	Nippon Steel Corp	マルテンサイト系ステンレス鋼線材および同線材加工製品の熱処理方法
JP2000026941A (ja) *	1998-05-08	2000-01-25	Nippon Steel Corp	耐食性に優れたディスクブレ―キ用マルテンサイト系ステンレス鋼
JP2000109956A (ja) *	1998-10-05	2000-04-18	Daido Steel Co Ltd	高温耐摩耗性の優れたステンレス鋼
JP2001003141A (ja) *	1999-06-22	2001-01-09	Nippon Steel Corp	ディスクブレーキ用マルテンサイト系ステンレス鋼
EP1106705A1 (en)	1999-11-30	2001-06-13	Nippon Steel Corporation	Stainless steel for brake disc excellent in resistance to temper softening
JP2001192779A (ja) *	2000-01-07	2001-07-17	Nippon Steel Corp	ディスクブレーキ用マルテンサイト系ステンレス鋼

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1403394A1 (en) *	2002-09-27	2004-03-31	Nisshin Steel Co., Ltd.	Deflection-resistant stainless steel-made structural members of a two-wheeled vehicle
US6890393B2 (en)	2003-02-07	2005-05-10	Advanced Steel Technology, Llc	Fine-grained martensitic stainless steel and method thereof
US6899773B2 (en)	2003-02-07	2005-05-31	Advanced Steel Technology, Llc	Fine-grained martensitic stainless steel and method thereof
WO2004097058A1 (ja) *	2003-04-28	2004-11-11	Jfe Steel Corporation	ディスクブレーキ用マルテンサイト系ステンレス鋼
JP2005133204A (ja) *	2003-10-08	2005-05-26	Jfe Steel Kk	耐焼戻し軟化性に優れるブレーキディスクおよびその製造方法
JP4496908B2 (ja) *	2003-10-08	2010-07-07	Ｊｆｅスチール株式会社	耐焼戻し軟化性に優れるブレーキディスクおよびその製造方法
WO2010140696A1 (ja)	2009-06-01	2010-12-09	Ｊｆｅスチール株式会社	ブレーキディスク用鋼板およびブレーキディスク
JP2011012343A (ja) *	2009-06-01	2011-01-20	Jfe Steel Corp	ブレーキディスク用鋼板およびブレーキディスク
US8607941B2 (en)	2009-06-01	2013-12-17	Jfe Steel Corporation	Steel sheet for brake disc, and brake disc

Also Published As

Publication number	Publication date
KR20030034165A (ko)	2003-05-01
US20040096352A1 (en)	2004-05-20
CN101906587A (zh)	2010-12-08
CN101906587B (zh)	2013-11-20
KR100765661B1 (ko)	2007-10-10
EP1314791A4 (en)	2006-01-11
EP1314791B1 (en)	2011-07-13
US6884388B2 (en)	2005-04-26
CN1697889B (zh)	2011-01-12
EP1314791A1 (en)	2003-05-28
CN1697889A (zh)	2005-11-16

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Publication	Publication Date	Title
WO2002018666A1 (fr)	2002-03-07	Acier inoxydable martensitique a faible teneur en carbone et son procede de production
KR101177540B1 (ko)	2012-08-28	가공성이 우수한 오스테나이트계 고Ｍｎ 스텐레스강
EP1236809A3 (en)	2004-03-03	High-hardness martensitic stainless steel excellent in corrosion resistance
WO2008136354A1 (ja)	2008-11-13	耐粒界腐食性および耐応力腐食割れ性に優れたオーステナイト系ステンレス鋼およびオーステナイト系ステンレス鋼材の製造方法
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RU2010121834A (ru)	2011-12-10	Стальная труба с высокой расширяемостью и способ ее изготовления
MX2009009769A (es)	2009-10-07	Acero para formacion en caliente o enfriamiento en una herramienta, que tiene ductilidad mejorada.
TW200741016A (en)	2007-11-01	Brake disks having high temper softening resistance
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US4450006A (en)	1984-05-22	Martensitic stainless steel
WO1982004268A1 (en)	1982-12-09	Low-carbon martensite stainless steel material for disc brake of motorcycle
CA2371333A1 (en)	2002-08-14	Steel for plastic molds and process for the heat treatment thereof
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