JPS54137423A - Heat treatment of high strength nodular cast iron - Google Patents
Heat treatment of high strength nodular cast ironInfo
- Publication number
- JPS54137423A JPS54137423A JP4546978A JP4546978A JPS54137423A JP S54137423 A JPS54137423 A JP S54137423A JP 4546978 A JP4546978 A JP 4546978A JP 4546978 A JP4546978 A JP 4546978A JP S54137423 A JPS54137423 A JP S54137423A
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- treatment
- molten
- heat treatment
- high strength
- 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
Classifications
-
- 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
- C21D5/00—Heat treatments of cast-iron
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
PURPOSE:To prevent the lowering of strength due to the rise of temperature by the procedure in which a nodular cast iron containing Ni is subjected to a hardening treatment ranging the austenitic zone to the Ms point, followed by a subzero treatment and a tempering treatment. CONSTITUTION:The molten cast iron, containing 1.7 to 3.8 wt% C, 0.8 to 3 wt% Si, and 0.3 to 2 wt% Mn, is added 6 to 12 wt% Ni, and then graphite is spheroidized by using a Fe-Si-Mg spheroidizing agent. Very shortly thereafter, the molten cast iron is inoculated with Fe-Si. The molten nodular graphite cast iron is cast into a sedired mold and then after solidification is taken out of the mold. Then, it is hardened at a temperature ranging the austenitic zone to the Ma point and subjected soon to a subzero treatment with liquid nitrogen. After being allowed to stand in the air, it is then heated at 150 to 400 deg.C for 30 min, cooled by air, and tempered. The treatment gives the cast iron a tensile strength of more than 140 kg/mm<2> even at high temperature of 300 deg.C.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4546978A JPS54137423A (en) | 1978-04-17 | 1978-04-17 | Heat treatment of high strength nodular cast iron |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4546978A JPS54137423A (en) | 1978-04-17 | 1978-04-17 | Heat treatment of high strength nodular cast iron |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54137423A true JPS54137423A (en) | 1979-10-25 |
JPS5740888B2 JPS5740888B2 (en) | 1982-08-31 |
Family
ID=12720233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4546978A Granted JPS54137423A (en) | 1978-04-17 | 1978-04-17 | Heat treatment of high strength nodular cast iron |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54137423A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100681270B1 (en) | 2005-09-05 | 2007-02-09 | 한금태 | Nodular cast iron |
JP2008174788A (en) * | 2007-01-18 | 2008-07-31 | Osaka Prefecture | High-hardness alloy cast iron material containing spheroidal vanadium carbide and its manufacturing method |
TWI447230B (en) * | 2011-12-27 | 2014-08-01 | Metal Ind Res & Dev Ct | A manufacturing method for austempered ductile iron |
CN104831050A (en) * | 2015-05-13 | 2015-08-12 | 广西梧州运龙港船机械制造有限公司 | Hardening and tempering process of marine nodular cast iron crankshaft |
CN105950954A (en) * | 2016-05-16 | 2016-09-21 | 江苏力源金河铸造有限公司 | Smelting method for high-strength thick and large ductile iron |
CN111020162A (en) * | 2019-12-20 | 2020-04-17 | 深圳市山卓谐波传动科技有限公司 | Rigid wheel manufacturing method, rigid wheel and harmonic reducer |
-
1978
- 1978-04-17 JP JP4546978A patent/JPS54137423A/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100681270B1 (en) | 2005-09-05 | 2007-02-09 | 한금태 | Nodular cast iron |
JP2008174788A (en) * | 2007-01-18 | 2008-07-31 | Osaka Prefecture | High-hardness alloy cast iron material containing spheroidal vanadium carbide and its manufacturing method |
JP4646926B2 (en) * | 2007-01-18 | 2011-03-09 | 大阪府 | Spherical vanadium carbide-containing high-hardness cast iron material and method for producing the same |
TWI447230B (en) * | 2011-12-27 | 2014-08-01 | Metal Ind Res & Dev Ct | A manufacturing method for austempered ductile iron |
CN104831050A (en) * | 2015-05-13 | 2015-08-12 | 广西梧州运龙港船机械制造有限公司 | Hardening and tempering process of marine nodular cast iron crankshaft |
CN105950954A (en) * | 2016-05-16 | 2016-09-21 | 江苏力源金河铸造有限公司 | Smelting method for high-strength thick and large ductile iron |
CN111020162A (en) * | 2019-12-20 | 2020-04-17 | 深圳市山卓谐波传动科技有限公司 | Rigid wheel manufacturing method, rigid wheel and harmonic reducer |
Also Published As
Publication number | Publication date |
---|---|
JPS5740888B2 (en) | 1982-08-31 |
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