JPS54137423A - Heat treatment of high strength nodular cast iron - Google Patents

Heat treatment of high strength nodular cast iron

Info

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
Application number
JP4546978A
Other languages
Japanese (ja)
Other versions
JPS5740888B2 (en
Inventor
Masaru Yamaguchi
Tsutomu Kuwabara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen Corp
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.)
Filing date
Publication date
Application filed by Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP4546978A priority Critical patent/JPS54137423A/en
Publication of JPS54137423A publication Critical patent/JPS54137423A/en
Publication of JPS5740888B2 publication Critical patent/JPS5740888B2/ja
Granted legal-status Critical Current

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.
JP4546978A 1978-04-17 1978-04-17 Heat treatment of high strength nodular cast iron Granted JPS54137423A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (7)

* Cited by examiner, † Cited by third party
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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