US3891432A - High toughness spheroidal graphite cast iron and method for producing the same - Google Patents
High toughness spheroidal graphite cast iron and method for producing the same Download PDFInfo
- Publication number
- US3891432A US3891432A US430681A US43068174A US3891432A US 3891432 A US3891432 A US 3891432A US 430681 A US430681 A US 430681A US 43068174 A US43068174 A US 43068174A US 3891432 A US3891432 A US 3891432A
- Authority
- US
- United States
- Prior art keywords
- cast iron
- spheroidal graphite
- graphite cast
- spheroidizing
- balance
- 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.)
- Expired - Lifetime
Links
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 229910001562 pearlite Inorganic materials 0.000 claims abstract description 10
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 10
- 239000000155 melt Substances 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 229910002804 graphite Inorganic materials 0.000 description 8
- 239000010439 graphite Substances 0.000 description 8
- 229910020091 MgCa Inorganic materials 0.000 description 4
- 229910018648 Mn—N Inorganic materials 0.000 description 4
- 101100003996 Mus musculus Atrn gene Proteins 0.000 description 4
- 238000005266 casting Methods 0.000 description 4
- 235000000396 iron Nutrition 0.000 description 4
- 229910019590 Cr-N Inorganic materials 0.000 description 3
- 229910019588 Cr—N Inorganic materials 0.000 description 3
- 229910000805 Pig iron Inorganic materials 0.000 description 3
- 229910001037 White iron Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 229910001567 cementite Inorganic materials 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 2
- 241001517013 Calidris pugnax Species 0.000 description 1
- 241001387976 Pera Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 1
- 239000000276 potassium ferrocyanide Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- XOGGUFAVLNCTRS-UHFFFAOYSA-N tetrapotassium;iron(2+);hexacyanide Chemical compound [K+].[K+].[K+].[K+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] XOGGUFAVLNCTRS-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/04—Cast-iron alloys containing spheroidal graphite
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
Definitions
- said spheroidal graphite cast iron has a tensile strength of about 60 kgfmm an elongation of l-2% and a hardness (HB) of about 300.
- the object of this invention is to provide a spheroidal graphite cast iron markedly improved in elongation without lowering its tensile strength and a method for producing the same.
- This invention provides a spheroidal graphite cast iron which comprises, by weight, 3.24.0% of C,
- Si spheroidal graphite, ferrite and pearlite.
- this invention provides a method for producing a spheroidal graphite cast iron which comprises adding N to a melt of cast iron during or after spheroidizing treatment to obtain a spheroidal graphite cast iron having the compositions of 32-40% of C, 2.0-3.8% of Si. not more than 1.0% of Mn, not more than 0.1% of spheroidizing element, 0.0035-0.02% of N and the balance Fe and incidental impurities and having spheroidal graphite, ferrite and pearlite structure.
- sample No. 1-3 are the conventional spheroidal graphite cast irons and No. 4-19 are the spheroidal graphite cast iron of this invention.
- l-3 had a tensile strength of 49.0 kg/mm, 62.0 kg/mm and 72.4 kg/mm while they had low elongation of 18%, 11% and 2% in connection with their tensile strength and the spheroidal graphite cast irons No. 4-19 of this invention had markedly increased elongation in connection with their tensile strength.
- the cast iron which shows the best characteristics in this invention is one which contains 0.005-0.013% of N in addition to the basic components of C, Si, Mn and Mg.
- C is essential for production of spheroidal graphite cast iron.
- content ofC is less than 3.2%, it tends to become white iron and is not suitable for use and when more than 40%, graphite dross is produced due to floatation of graphite during solidification of cast iron.
- the rang ofC content is limited to 32-40%.
- the cast iron When content of Mn is more than 1.0%, the cast iron becomes white pig iron and hence it is limited to not more than 1.0%.
- spheroidizing elements such as Mg and Ca are contained in an amount of more than 0.1%, the cast iron is apt to become white pig iron and also dross may form. Therefore, content thereof is limited to not more than 0.1%.
- any of the known spheroidizing agents for example, Mg, Ca, Ce, MgCa, MgCe, MgCa-Ce, etc. may be used.
- N When content of N is less than 0.0035%, elongation is not improved so much and when more than 0.02%, casting defects are brought about and the cast iron is apt to become white pig iron. Therefore, content on N is limited to 0.00350.02%.
- a high toughness spheroidal graphite cast iron which comprises, by weight, 32-40% of C, 20-38% of Si, not more than 1.0% of Mn, not more than 0.1% ofa spheroidizing element, 0.00350.02% of N and the balance Fe and incidental impurities, said cast iron having a matrix structure which comprises ferrite and pearlite.
- a method for producing a high toughness spheroidal graphite cast iron which comprises adding N to a melt of cast iron containing C, Si and Mn as basic components during spheroidizing treatment to result in a composition containing 32-40% of C, 20-38% of Si, not more than 1.0% of Mn, not more than 0.1% of a spheroidizing element, 0.00350.02% of N and the balance Fe and incidental impurities and thereafter forming ferrite and pearlite structures from said composition.
- said spheroidizing element is selected from the group consisting of Mg, Ca, Ce, MgCa, MgCe and Mg- CaCe.
- composition consists essentially of, by weight, 32-40% of C, 20-38% of Si, not more than 1.0% of Mn, not more than 0.1% ofa spheroidizing element, 0.00350.02% of N and the balance Fe and incidental impurities.
- composition consists of, by weight, 32-40% of C, 20-38% of Si, not more than 1.0% of Mn, not more than 0.1% ofa spheroidizing element, 00035-0.02% of N and the balance Fe and incidental impurities.
- a method for producing a high toughness spheroidal graphite cast iron which comprises adding N to a melt of cast iron containing C, Si and Mn as basic components after spheroidizing treatment to result in a composition containing 32-40% of C, 20-38% of Si, not more than 1.0% of Mn, not more than 0.1% of a spheroidizing element, 0.00350.02% of N and the balance Fe and incidental impurities and thereafter forming ferrite and pearlite structures from said composition.
- said spheroidizing element is selected from the group consisting of Mg, Ca, Ce, MgCa, MgCe and Mg- CaCe.
- composition consists essentially of, by weight, 32-40% of C, 20-38% of Si, not more than 1.0% of Mn, not more than 0.1% of a spheroidizing element, 0.00350.02% of N and the balance Fe and incidental impurities.
- composition consists of, by weight, 32-40% of C, 20-38% of Si, not more than 1.0% of Mn, not more than 0.1% ofa spheroidizing element, 0.00350.02% of N and the balance Fe and incidental impurities.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP953073A JPS543129B2 (enrdf_load_html_response) | 1973-01-24 | 1973-01-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3891432A true US3891432A (en) | 1975-06-24 |
Family
ID=11722810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US430681A Expired - Lifetime US3891432A (en) | 1973-01-24 | 1974-01-04 | High toughness spheroidal graphite cast iron and method for producing the same |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3891432A (enrdf_load_html_response) |
| JP (1) | JPS543129B2 (enrdf_load_html_response) |
| DE (1) | DE2402945A1 (enrdf_load_html_response) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3977868A (en) * | 1974-08-16 | 1976-08-31 | Hitachi, Ltd. | Nitrogen containing additive for strengthening cast iron |
| US6866726B1 (en) * | 1999-06-08 | 2005-03-15 | Asahi Tec Corporation | Non-austemper treated spheroidal graphite cast iron |
| US20060144478A1 (en) * | 2003-02-12 | 2006-07-06 | Nippon Steel Corporation | Cast iron billet excelling in workability and process for producing the same |
| WO2008003395A3 (en) * | 2006-07-03 | 2008-02-28 | Zanardi Fonderie S P A | Method for manufacturing spheroidal cast iron mechanical components |
| WO2018114845A1 (fr) | 2016-12-19 | 2018-06-28 | Saint Gobain Pam | Objet en fonte à graphite sphéroïdal, élément et procédé de fabrication correspondants |
| CN110662847A (zh) * | 2017-03-29 | 2020-01-07 | 株式会社Ｉ２Ｃ技研 | 具有超微细球墨的球墨铸铁的模具铸造品的制造方法及球化处理剂 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51123719A (en) * | 1975-04-22 | 1976-10-28 | Katsuya Igawa | Tough spherical graphite cast-iron and heat treatment thereof |
| DE3734877C1 (de) * | 1987-10-15 | 1988-10-27 | Sueddeutsche Kalkstickstoff | Mittel und Verfahren zur Aufstickung von Gusseisen |
| JP6717245B2 (ja) | 2017-03-17 | 2020-07-01 | 三菱マテリアル株式会社 | 接合体の製造方法、絶縁回路基板の製造方法、及び、ヒートシンク付き絶縁回路基板の製造方法 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3013911A (en) * | 1953-11-18 | 1961-12-19 | Renault | Malleable cast iron compositions |
| US3133813A (en) * | 1960-08-30 | 1964-05-19 | Teves Kg Alfred | Process for the manufacture of cast iron having an eutectic graphite formation |
| US3177072A (en) * | 1960-09-14 | 1965-04-06 | Sueddeutsche Kalkstickstoff | Alloy containing magnesium, silicon, and calcium |
| US3257197A (en) * | 1963-04-17 | 1966-06-21 | Union Carbide Corp | Method for adding nitrogen to molten metals |
| US3309197A (en) * | 1962-10-16 | 1967-03-14 | Kusaka Kazuji | Nodular graphite cast iron containing calcium and magnesium |
| US3321304A (en) * | 1963-12-23 | 1967-05-23 | American Cast Iron Pipe Co | Materials for and methods of treating molten ferrous metals to produce nodular iron |
| US3492118A (en) * | 1966-05-24 | 1970-01-27 | Foote Mineral Co | Process for production of as-cast nodular iron |
| US3767386A (en) * | 1971-04-05 | 1973-10-23 | Kaisha K Uedasa Chuzo Sho | Compound cast-iron for making brake shoes |
-
1973
- 1973-01-24 JP JP953073A patent/JPS543129B2/ja not_active Expired
-
1974
- 1974-01-04 US US430681A patent/US3891432A/en not_active Expired - Lifetime
- 1974-01-22 DE DE2402945A patent/DE2402945A1/de active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3013911A (en) * | 1953-11-18 | 1961-12-19 | Renault | Malleable cast iron compositions |
| US3133813A (en) * | 1960-08-30 | 1964-05-19 | Teves Kg Alfred | Process for the manufacture of cast iron having an eutectic graphite formation |
| US3177072A (en) * | 1960-09-14 | 1965-04-06 | Sueddeutsche Kalkstickstoff | Alloy containing magnesium, silicon, and calcium |
| US3309197A (en) * | 1962-10-16 | 1967-03-14 | Kusaka Kazuji | Nodular graphite cast iron containing calcium and magnesium |
| US3257197A (en) * | 1963-04-17 | 1966-06-21 | Union Carbide Corp | Method for adding nitrogen to molten metals |
| US3321304A (en) * | 1963-12-23 | 1967-05-23 | American Cast Iron Pipe Co | Materials for and methods of treating molten ferrous metals to produce nodular iron |
| US3492118A (en) * | 1966-05-24 | 1970-01-27 | Foote Mineral Co | Process for production of as-cast nodular iron |
| US3767386A (en) * | 1971-04-05 | 1973-10-23 | Kaisha K Uedasa Chuzo Sho | Compound cast-iron for making brake shoes |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3977868A (en) * | 1974-08-16 | 1976-08-31 | Hitachi, Ltd. | Nitrogen containing additive for strengthening cast iron |
| US6866726B1 (en) * | 1999-06-08 | 2005-03-15 | Asahi Tec Corporation | Non-austemper treated spheroidal graphite cast iron |
| US20060144478A1 (en) * | 2003-02-12 | 2006-07-06 | Nippon Steel Corporation | Cast iron billet excelling in workability and process for producing the same |
| US20100172784A1 (en) * | 2003-02-12 | 2010-07-08 | Nippon Steel Corporation | Cast iron semi-finished product excellent in workability and method of production of the same |
| US8302667B2 (en) | 2003-02-12 | 2012-11-06 | Nippon Steel Corporation | Cast iron semi-finished product excellent in workability and method of production of the same |
| WO2008003395A3 (en) * | 2006-07-03 | 2008-02-28 | Zanardi Fonderie S P A | Method for manufacturing spheroidal cast iron mechanical components |
| US20090320971A1 (en) * | 2006-07-03 | 2009-12-31 | Zanardi Fonderie S.P.A. | Method for manufacturing spheroidal cast iron mechanical components |
| US8328965B2 (en) | 2006-07-03 | 2012-12-11 | Zanardi Fonderie S.P.A. | Method for manufacturing spheroidal cast iron mechanical components |
| WO2018114845A1 (fr) | 2016-12-19 | 2018-06-28 | Saint Gobain Pam | Objet en fonte à graphite sphéroïdal, élément et procédé de fabrication correspondants |
| EP4050116A1 (fr) | 2016-12-19 | 2022-08-31 | Saint-Gobain Pam Canalisation | Procédé de fabrication d'un objet en fonte à graphite sphéroïdal, et élément correspondant |
| CN110662847A (zh) * | 2017-03-29 | 2020-01-07 | 株式会社Ｉ２Ｃ技研 | 具有超微细球墨的球墨铸铁的模具铸造品的制造方法及球化处理剂 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4997720A (enrdf_load_html_response) | 1974-09-17 |
| JPS543129B2 (enrdf_load_html_response) | 1979-02-19 |
| DE2402945A1 (de) | 1974-08-01 |
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