JPS54107416A - Heat-resistant low alloy steel casting and its heating treatment - Google Patents
Heat-resistant low alloy steel casting and its heating treatmentInfo
- Publication number
- JPS54107416A JPS54107416A JP1352078A JP1352078A JPS54107416A JP S54107416 A JPS54107416 A JP S54107416A JP 1352078 A JP1352078 A JP 1352078A JP 1352078 A JP1352078 A JP 1352078A JP S54107416 A JPS54107416 A JP S54107416A
- Authority
- JP
- Japan
- Prior art keywords
- steel casting
- alloy steel
- low alloy
- resistant low
- heat
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000005266 casting Methods 0.000 title abstract 6
- 229910000851 Alloy steel Inorganic materials 0.000 title abstract 5
- 238000010438 heat treatment Methods 0.000 title 1
- 229910001563 bainite Inorganic materials 0.000 abstract 2
- 238000005496 tempering Methods 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 229910052804 chromium Inorganic materials 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 150000001247 metal acetylides Chemical class 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 229910052758 niobium Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- 229910052726 zirconium Inorganic materials 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract 1
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE: To raise the strength of low alloy steel casting at high temperatures as well as minimize the developing rate of creep cracks by the procedure in which a Cr-Mo-V low alloy steel casting is heated in the temperature range where carbide crystallizes out, and then subjected to a more than one repeated homogenizing and tempering treatment.
CONSTITUTION: The heat resistant low alloy steel casting contains 0.05 to 0.40% C; < 1.5% Si, < 3.0% Mn, 0.5 to 3.0% Cr, 0.5 to 3.0% Mo, and 0.10 to 0.20% V, together, as needed, with <0.50% Ni or 0.005 to 0.10% at least one of Ti, Al, Zr, Nb, and Ta, which serve to improve toughness and also to make finer crystal granules. The steel casting is heated to 230 to 460°C or 670 to 780°C at which carbides crystallize out, and then subjected to a more than one repeated homogenizing and tempering treatment in order to convert all constitution into the fine structure of bainite or bainite and ferrite. Thus, a heat resistant low alloy steel casting which is excellent in high temperature strength and also small in the developing rate of creep cracks can be obtained, which is suitable for the casing material of steam turbine.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1352078A JPS54107416A (en) | 1978-02-10 | 1978-02-10 | Heat-resistant low alloy steel casting and its heating treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1352078A JPS54107416A (en) | 1978-02-10 | 1978-02-10 | Heat-resistant low alloy steel casting and its heating treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54107416A true JPS54107416A (en) | 1979-08-23 |
| JPS6132384B2 JPS6132384B2 (en) | 1986-07-26 |
Family
ID=11835421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1352078A Granted JPS54107416A (en) | 1978-02-10 | 1978-02-10 | Heat-resistant low alloy steel casting and its heating treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54107416A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59200742A (en) * | 1983-04-28 | 1984-11-14 | Daido Steel Co Ltd | Heat resistant steel |
| JPS62290849A (en) * | 1986-06-10 | 1987-12-17 | Mitsubishi Heavy Ind Ltd | Rotor for geothermal steam turbine |
| JPS6335759A (en) * | 1986-07-31 | 1988-02-16 | Mitsubishi Heavy Ind Ltd | Geothermal turbine rotor material |
| US5383768A (en) * | 1989-02-03 | 1995-01-24 | Hitachi, Ltd. | Steam turbine, rotor shaft thereof, and heat resisting steel |
| KR100346305B1 (en) * | 1999-12-10 | 2002-07-26 | 두산중공업 주식회사 | A Method of Manufacturing a Low Alloy Steel with High Toughness for a Compressor and Turbine Wheel in a Combined cycle Power Plant |
| JP2005060826A (en) * | 2003-07-30 | 2005-03-10 | Toshiba Corp | Steam turbine power generating unit |
| JP2008544083A (en) * | 2006-02-01 | 2008-12-04 | バラット ヘビー エレクトリカルズ リミテッド | Addition of niobium to Cr-Mo-1 / 4V cast steel for steam turbine casing |
| US8025746B2 (en) * | 2006-03-23 | 2011-09-27 | Hitachi, Ltd. | Turbine casing |
-
1978
- 1978-02-10 JP JP1352078A patent/JPS54107416A/en active Granted
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59200742A (en) * | 1983-04-28 | 1984-11-14 | Daido Steel Co Ltd | Heat resistant steel |
| JPS62290849A (en) * | 1986-06-10 | 1987-12-17 | Mitsubishi Heavy Ind Ltd | Rotor for geothermal steam turbine |
| JPS6335759A (en) * | 1986-07-31 | 1988-02-16 | Mitsubishi Heavy Ind Ltd | Geothermal turbine rotor material |
| US5383768A (en) * | 1989-02-03 | 1995-01-24 | Hitachi, Ltd. | Steam turbine, rotor shaft thereof, and heat resisting steel |
| KR100346305B1 (en) * | 1999-12-10 | 2002-07-26 | 두산중공업 주식회사 | A Method of Manufacturing a Low Alloy Steel with High Toughness for a Compressor and Turbine Wheel in a Combined cycle Power Plant |
| JP2005060826A (en) * | 2003-07-30 | 2005-03-10 | Toshiba Corp | Steam turbine power generating unit |
| JP4509664B2 (en) * | 2003-07-30 | 2010-07-21 | 株式会社東芝 | Steam turbine power generation equipment |
| US7850424B2 (en) | 2003-07-30 | 2010-12-14 | Kabushiki Kaisha Toshiba | Steam turbine power plant |
| JP2008544083A (en) * | 2006-02-01 | 2008-12-04 | バラット ヘビー エレクトリカルズ リミテッド | Addition of niobium to Cr-Mo-1 / 4V cast steel for steam turbine casing |
| US8025746B2 (en) * | 2006-03-23 | 2011-09-27 | Hitachi, Ltd. | Turbine casing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6132384B2 (en) | 1986-07-26 |
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