JP2008544083A - 蒸気タービンケーシング用Cr−Mo−1/4V鋳鋼品に対するニオブの添加 - Google Patents
蒸気タービンケーシング用Cr−Mo−1/4V鋳鋼品に対するニオブの添加 Download PDFInfo
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- JP2008544083A JP2008544083A JP2008516506A JP2008516506A JP2008544083A JP 2008544083 A JP2008544083 A JP 2008544083A JP 2008516506 A JP2008516506 A JP 2008516506A JP 2008516506 A JP2008516506 A JP 2008516506A JP 2008544083 A JP2008544083 A JP 2008544083A
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- cast steel
- steel
- niobium
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- 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- 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
- C22C38/04—Ferrous alloys, e.g. steel alloys containing 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- 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
-
- 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
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
Abstract
Description
以下、添付図面を見ながら本発明の細目について説明する。
この鋳鋼は、0.08〜0.12重量%の炭素、0.015重量%またはそれ以下の硫黄、0.02重量%またはそれ以下の燐、0.30〜0.60重量%の珪素、0.50〜0.80重量%のマンガン、1.20〜1.50重量%のクロム、0.90〜1.00重量%のモリブデン、0.20〜0.30重量%のバナジウム、偶発的不純物を除く残部としての鉄を含み、これに0.04〜0.08重量%のニオブが添加されている。基材であるクロム−モリブデン−バナジウム鋳鋼は、鋳鋼の均熱化処理を施され、次いで0.04〜0.08重量パーセントのニオブが添加される。ニオブの添加は誘導溶解炉で行なわれる。
B:0.04重量%のニオブを含むCr−Mo−V鋳造品。
C:0.06%のニオブを含むCr−Mo−V鋳造品。
D:0.08%のニオブを含むCr−Mo−V鋳造品。
予熱温度 :300℃(有効性:最低240℃)
パス間温度 :400℃(有効性:最高500℃)
熱処理の状態 :焼入れと、焼き戻しを施した
溶接後熱処理の種類 :焼入れ、および焼き戻し
温度 :WQ‐930℃(930℃〜950℃で有効)
:T‐720℃(710℃〜730℃で有効)
時間 :WQ‐6時間、T‐8時間
電流範囲 :直流180〜220アンペア
電圧範囲 :24〜28V
極性 :逆(DCEPのみに有効)
継手準備 :裏当てを用いて完全透過
溶接位置 :根元面2mm、根元間隙5mm、
継ぎ目側角度10°
一連の溶接 :多層溶接
Claims (9)
- 0.04〜0.08重量%のニオブを含むCr−Mo−V鋳鋼。
- 炭素含有量が0.08〜0.12重量%である請求項1に記載されたCr−Mo−V鋳鋼。
- 硫黄含有量が0.015重量%以下である請求項1に記載されたCr−Mo−V鋳鋼。
- 燐含有量が0.02重量%以下である請求項1に記載されたCr−Mo−V鋳鋼。
- 珪素含有量が0.30〜0.60重量%である請求項1に記載されたCr−Mo−V鋳鋼。
- マンガン含有量が0.50〜0.80重量%である請求項1に記載されたCr−Mo−V鋳鋼。
- クロム含有量が1.20〜1.50重量%である請求項1に記載されたCr−Mo−V鋳鋼。
- モリブデン含有量が0.90〜1.10重量%である請求項1に記載されたCr−Mo−V鋳鋼。
- バナジウム含有量が0.20〜0.30重量%である請求項1に記載されたCr−Mo−V鋳鋼。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN102KO2006 | 2006-02-01 | ||
IN102/KOL/2006 | 2006-02-01 | ||
PCT/IN2006/000097 WO2007088555A1 (en) | 2006-02-01 | 2006-03-20 | Niobium addition in crmo¼v steel castings for steam turbine casing appliations |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2012198241A Division JP2013032592A (ja) | 2006-02-01 | 2012-09-10 | 蒸気タービンケーシング用Cr−Mo−1/4V鋳鋼品に対するニオブの添加 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008544083A true JP2008544083A (ja) | 2008-12-04 |
JP5220595B2 JP5220595B2 (ja) | 2013-06-26 |
Family
ID=38327158
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008516506A Expired - Fee Related JP5220595B2 (ja) | 2006-02-01 | 2006-03-20 | 蒸気タービンケーシング用Cr−Mo−1/4V鋳鋼品に対するニオブの添加 |
JP2012198241A Pending JP2013032592A (ja) | 2006-02-01 | 2012-09-10 | 蒸気タービンケーシング用Cr−Mo−1/4V鋳鋼品に対するニオブの添加 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2012198241A Pending JP2013032592A (ja) | 2006-02-01 | 2012-09-10 | 蒸気タービンケーシング用Cr−Mo−1/4V鋳鋼品に対するニオブの添加 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7981360B2 (ja) |
EP (1) | EP1979499B1 (ja) |
JP (2) | JP5220595B2 (ja) |
CN (1) | CN101111618B (ja) |
WO (1) | WO2007088555A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007088555A1 (en) * | 2006-02-01 | 2007-08-09 | Bharat Heavy Electricals Limited | Niobium addition in crmo¼v steel castings for steam turbine casing appliations |
US9359913B2 (en) | 2013-02-27 | 2016-06-07 | General Electric Company | Steam turbine inner shell assembly with common grooves |
CN104651753A (zh) * | 2014-11-28 | 2015-05-27 | 南京钢铁股份有限公司 | 一种重型汽车平衡轴用非调质钢及其制造方法 |
CN105508686A (zh) * | 2016-01-15 | 2016-04-20 | 盐城法尔机械有限公司 | 一种用于高温高压的安全阀门 |
CN105508687A (zh) * | 2016-01-15 | 2016-04-20 | 盐城法尔机械有限公司 | 一种耐腐蚀性强的安全阀门 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54107416A (en) * | 1978-02-10 | 1979-08-23 | Hitachi Ltd | Heat-resistant low alloy steel casting and its heating treatment |
JPH09118953A (ja) * | 1995-08-21 | 1997-05-06 | Mitsubishi Heavy Ind Ltd | 高温強度と溶接性に優れた低Crフェライト鋼 |
JPH10121188A (ja) * | 1996-10-09 | 1998-05-12 | Mitsubishi Heavy Ind Ltd | 高温強度と溶接性に優れた低Crフェライト鋳鋼 |
JPH10259449A (ja) * | 1997-01-17 | 1998-09-29 | Mitsubishi Heavy Ind Ltd | 低合金耐熱鋳鋼及び蒸気タービン用鋳鋼部品 |
JP2001342549A (ja) * | 2000-03-30 | 2001-12-14 | Sumitomo Metal Ind Ltd | 低・中Cr系耐熱鋼 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63199850A (ja) * | 1987-02-16 | 1988-08-18 | Toshiba Corp | 低合金耐熱鋳鋼 |
DE69003202T2 (de) * | 1989-07-31 | 1994-03-31 | Mitsubishi Heavy Ind Ltd | Hochfeste, hitzebeständige, niedrig legierte Stähle. |
JP2659813B2 (ja) * | 1989-08-30 | 1997-09-30 | 三菱重工業株式会社 | 高強度低合金耐熱鋼の製造方法 |
JPH09263888A (ja) * | 1996-03-28 | 1997-10-07 | Mitsubishi Heavy Ind Ltd | 圧力容器用鋳鋼材及び圧力容器の製造方法 |
FR2748036B1 (fr) * | 1996-04-29 | 1998-05-22 | Creusot Loire | Acier faiblement allie pour la fabrication de moules pour matieres plastiques |
EP0816523B1 (en) * | 1996-06-24 | 2001-06-13 | Mitsubishi Jukogyo Kabushiki Kaisha | Low-Cr ferritic steels and low-Cr ferritic cast steels having excellent high-temperature strength and weldability |
JP2003306740A (ja) * | 2002-04-18 | 2003-10-31 | Jfe Steel Kk | 金属材料の熱間圧延用ロール |
JP2005029882A (ja) * | 2003-06-19 | 2005-02-03 | Nisshin Steel Co Ltd | 耐溶接軟化性に優れた構造用高強度電縫鋼管の製造方法 |
WO2007088555A1 (en) * | 2006-02-01 | 2007-08-09 | Bharat Heavy Electricals Limited | Niobium addition in crmo¼v steel castings for steam turbine casing appliations |
-
2006
- 2006-03-20 WO PCT/IN2006/000097 patent/WO2007088555A1/en active Application Filing
- 2006-03-20 US US11/885,810 patent/US7981360B2/en not_active Expired - Fee Related
- 2006-03-20 EP EP06745200.3A patent/EP1979499B1/en not_active Not-in-force
- 2006-03-20 CN CN200680000921.1A patent/CN101111618B/zh not_active Expired - Fee Related
- 2006-03-20 JP JP2008516506A patent/JP5220595B2/ja not_active Expired - Fee Related
-
2012
- 2012-09-10 JP JP2012198241A patent/JP2013032592A/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54107416A (en) * | 1978-02-10 | 1979-08-23 | Hitachi Ltd | Heat-resistant low alloy steel casting and its heating treatment |
JPH09118953A (ja) * | 1995-08-21 | 1997-05-06 | Mitsubishi Heavy Ind Ltd | 高温強度と溶接性に優れた低Crフェライト鋼 |
JPH10121188A (ja) * | 1996-10-09 | 1998-05-12 | Mitsubishi Heavy Ind Ltd | 高温強度と溶接性に優れた低Crフェライト鋳鋼 |
JPH10259449A (ja) * | 1997-01-17 | 1998-09-29 | Mitsubishi Heavy Ind Ltd | 低合金耐熱鋳鋼及び蒸気タービン用鋳鋼部品 |
JP2001342549A (ja) * | 2000-03-30 | 2001-12-14 | Sumitomo Metal Ind Ltd | 低・中Cr系耐熱鋼 |
Also Published As
Publication number | Publication date |
---|---|
CN101111618A (zh) | 2008-01-23 |
WO2007088555A1 (en) | 2007-08-09 |
US20080138234A1 (en) | 2008-06-12 |
JP5220595B2 (ja) | 2013-06-26 |
EP1979499A4 (en) | 2010-04-21 |
EP1979499A1 (en) | 2008-10-15 |
JP2013032592A (ja) | 2013-02-14 |
US7981360B2 (en) | 2011-07-19 |
EP1979499B1 (en) | 2017-11-15 |
CN101111618B (zh) | 2014-06-25 |
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