US3765875A - Inoculating alloy for cast irons - Google Patents
Inoculating alloy for cast irons Download PDFInfo
- Publication number
- US3765875A US3765875A US00164031A US3765875DA US3765875A US 3765875 A US3765875 A US 3765875A US 00164031 A US00164031 A US 00164031A US 3765875D A US3765875D A US 3765875DA US 3765875 A US3765875 A US 3765875A
- Authority
- US
- United States
- Prior art keywords
- percent
- alloy
- carbon
- iron
- cast iron
- 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
Classifications
-
- 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
- C21C1/105—Nodularising additive agents
-
- 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
Definitions
- the present invention relates to the sphere of alloys intended for improving cast iron, including the inoculation of grey or spheroidal cast irons with an'alloy having the following composition:
- the present invention relates to alloys intended for improving cast iron.
- the variation in mechanical characteristics, as a function of the chemical composition of a lamellar grey iron, is well known.
- the composition of the cast iron is generally expressed by its equivalent carbon and it is, for example, known that the tensile strength increases with decrease in carbon equivalent.
- inoculating alloys is not limited to grey cast iron and that such alloys used on spheroidal graphite cast iron permit the improvement in such characteristics as:
- ferro-silicons of different grades are among the inoculating alloys which are most frequently employed in the practice of inoculation.
- the object of the invention is an inoculating alloy of a novel Fe-Si-Ca-C type, which is more effective than ferro-silicons to which carbon or calcium has been added.
- the alloy of this invention contains 55 to 85 percent of silicon, 0.2 to 1 percent of carbon, 2 to 5 percent of calcium and up to 2 percentof aluminum, the remainder being iron plus its usual impurities which originate mainly from the initial materials.
- Commercial ferrosilicons are known which contain 1.3 to 1.5 percent of Al, 0 to 0.03 percent of Ti, 0 to 0.20 percent of Mn, 0 to 0.10 percent of Ni, 0 to 0.02 percent of Cr, 0 to 0.003 percent of S, 0 to 0.003 percent of P, 0 to 0.002 percent of Cu.
- the alloy contains to percent of silicon, 0.3 to 0.7 percent of carbon, 2.0 to
- This alloy can be introduced into the cast iron by using the different procedures employed for the inoculation and peculiar to the foundry art.
- Such an alloy can particularly be obtained by a process which consists in adding the carbon to a liquid alloy containing Si and Ca, by the addition of cast iron.
- Example 1 Into a synthesis induction furnace are introduced 12 kg of an SiCa alloy (Ca 31.8 percent) and kg of industrial silicon (Si 97.7 percent); When the metal is liquid, 20 kg of small pieces of a hypereutectic cast iron titrating 5.6 percent of carbon are added. When the iron is dissolved, it is quickly poured. The product which is obtained contains:
- Example 3 Graphite in grain form 0.3 percent by ht In a ladle containing 607 kg of an industrial alloy in the liquid state and having the composition of: Si h percent Fe-S' IS the same that Tests I and 90.1 percent, Ca 2.8 percent, AI 1.22 percent, the 5 balance being iron and impurities, there are dissolved, Test 1 as before, 120 kg of a cast iron containing 3.14 percent Th d H d h h C and 2.3 percent Si. When the iron is dissolvedin the ls :7 a 91% f gi t e starting alloy, it is quickly poured. The product which "39? w cum: 6 m ca mm an as t e comis obtained contains:
- test IV representing the practice of this invention, gives the best results.
- E.L. e1astic limit (kg/mm?)
- R tensile strength (kg/mini).
- E, percent elongation percent.
- the variation is different from that which it would have been possible to allow for when the effects of the carbon and calcium are added separately.
- the carbon and the calcium by themselves lead to a reduction in the tensile strength, whereas their presence together in the alloy results in an improvement in this characteristic.
- Example 5 The products of tests l, II and IV of Example 4 are used this time for inoculating, for comparison purposes, a spheroidal graphite cast iron containing C 3.9 percent and Si 1.3 percent. It is known that the introduction of graphite, as in the tests HA and "B of. the preceding example, is not recommended with this type of cast iron. After nodulization treatment with a magnesium alloy, the spheroidal graphite iron is inoculated, for comparison purposes, with the three products I, II and IV, all three being used in the amount of inoculation temperature: 1460 5 C pouring temperature of the elements: 1420 5 C The compared results are set out in Table III.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (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)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7027144A FR2109058A5 (no) | 1970-07-23 | 1970-07-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3765875A true US3765875A (en) | 1973-10-16 |
Family
ID=9059094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00164031A Expired - Lifetime US3765875A (en) | 1970-07-23 | 1971-07-19 | Inoculating alloy for cast irons |
Country Status (17)
Country | Link |
---|---|
US (1) | US3765875A (no) |
JP (1) | JPS5411243B1 (no) |
AT (1) | AT312647B (no) |
AU (1) | AU459631B2 (no) |
BE (1) | BE770336A (no) |
CA (1) | CA973716A (no) |
CH (1) | CH526637A (no) |
DE (1) | DE2136508C3 (no) |
ES (1) | ES393532A1 (no) |
FR (1) | FR2109058A5 (no) |
GB (1) | GB1301238A (no) |
IL (1) | IL37366A (no) |
IT (1) | IT939330B (no) |
LU (1) | LU63594A1 (no) |
NL (1) | NL172344C (no) |
NO (1) | NO127979B (no) |
SE (1) | SE387371B (no) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3899320A (en) * | 1973-02-23 | 1975-08-12 | Kempten Elektroschmelz Gmbh | Process for making iron sponge pellets containing silicon carbide |
US3954446A (en) * | 1974-02-23 | 1976-05-04 | Kubota Ltd. | Method of producing high duty cast iron |
US4024322A (en) * | 1975-03-24 | 1977-05-17 | Hooker Chemicals & Plastics Corporation | Battery with silicon metal anodes |
US4290805A (en) * | 1978-04-06 | 1981-09-22 | Compagnie Universelle D'acetylene Et D'electro-Metallurgie | Method for obtaining iron-based alloys allowing in particular their mechanical properties to be improved by the use of lanthanum, and iron-based alloys obtained by the said method |
US4306904A (en) * | 1977-10-11 | 1981-12-22 | Societe Francaise D'electrometallurgie Sofrem | Process of introducing a solid addition into a bath of liquid metal |
US5002733A (en) * | 1989-07-26 | 1991-03-26 | American Alloys, Inc. | Silicon alloys containing calcium and method of making same |
US5008074A (en) * | 1990-04-26 | 1991-04-16 | American Alloys, Inc. | Inoculant for gray cast iron |
CN104831155A (zh) * | 2015-05-26 | 2015-08-12 | 新兴铸管股份有限公司 | 一种球墨铸铁管用孕育剂及其应用 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2823913C3 (de) * | 1978-05-31 | 1981-07-23 | Tul'skij proektno-konstruktorskij i technologičeskij institut mašinostroenija, Tula | Modifikationsmittel für Roheisen und Verfahren zu dessen Anwendung |
DE3409550C1 (de) * | 1984-03-15 | 1985-06-20 | Ingenieurbüro Dr.-Ing. Karl Ableidinger & Dr.-Ing. Hans Heyer, Zürich | Impflegierung zur Herstellung von sphaerolithischem Gusseisen |
DE3991628T1 (de) * | 1989-03-17 | 1991-04-04 | Do Politekh Inst | Stoff zum frischen von massenstahl |
RU2530190C1 (ru) * | 2013-06-10 | 2014-10-10 | Открытое акционерное общество Научно-производственное объединение "Центральный научно-исследовательский институт технологии машиностроения" ОАО НПО "ЦНИИТМАШ" | Модификатор для стали |
RU2567928C1 (ru) * | 2014-08-22 | 2015-11-10 | Акционерное общество "Научно-производственная корпорация "Уралвагонзавод" имени Ф.Э.Дзержинского" (АО "Научно-производственная корпорация "Уралвагонзавод") | Модифицирующая смесь для внепечной обработки стали |
RU2577660C1 (ru) * | 2014-11-20 | 2016-03-20 | Общество с ограниченной ответственностью Научно-технологический центр "СибЭкоТерм" (ООО "СибЭкоТерм") | Синтетический сплав для металлургии |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2139515A (en) * | 1938-04-25 | 1938-12-06 | Vanadium Corp | Alloys for addition to iron and steel |
US2705196A (en) * | 1952-02-20 | 1955-03-29 | Manufacturers Chemical Corp | Process for de-oxidizing a molten metal |
US2950187A (en) * | 1958-09-05 | 1960-08-23 | Res Inst Iron Steel | Iron-calcium base alloy |
US3256087A (en) * | 1962-03-02 | 1966-06-14 | Sueddeutsche Kalkstickstoff | Production of alloys |
US3301663A (en) * | 1963-04-27 | 1967-01-31 | Hoerder Huettenunion Ag | Steel making processes |
US3304174A (en) * | 1964-08-17 | 1967-02-14 | Res Inst Iron Steel | Low oxygen-silicon base addition alloys for iron and steel refining |
US3323899A (en) * | 1964-03-10 | 1967-06-06 | Union Carbide Corp | Casting process for ferroalloys |
US3364015A (en) * | 1963-06-24 | 1968-01-16 | Grace W R & Co | Silicon alloys containing rare earth metals |
US3575695A (en) * | 1967-10-18 | 1971-04-20 | Nippon Kokan Kk | Deoxidation method of molten steel |
-
1970
- 1970-07-23 FR FR7027144A patent/FR2109058A5/fr not_active Expired
-
1971
- 1971-07-19 US US00164031A patent/US3765875A/en not_active Expired - Lifetime
- 1971-07-21 IT IT51795/71A patent/IT939330B/it active
- 1971-07-21 SE SE7109384A patent/SE387371B/xx unknown
- 1971-07-21 DE DE2136508A patent/DE2136508C3/de not_active Expired
- 1971-07-21 GB GB1301238D patent/GB1301238A/en not_active Expired
- 1971-07-22 NL NLAANVRAGE7110105,A patent/NL172344C/xx not_active IP Right Cessation
- 1971-07-22 BE BE770336A patent/BE770336A/xx not_active IP Right Cessation
- 1971-07-22 CA CA118,893A patent/CA973716A/en not_active Expired
- 1971-07-22 ES ES393532A patent/ES393532A1/es not_active Expired
- 1971-07-22 CH CH1081771A patent/CH526637A/fr not_active IP Right Cessation
- 1971-07-22 IL IL37366A patent/IL37366A/xx unknown
- 1971-07-22 JP JP5490571A patent/JPS5411243B1/ja active Pending
- 1971-07-22 LU LU63594D patent/LU63594A1/xx unknown
- 1971-07-22 AT AT638871A patent/AT312647B/de not_active IP Right Cessation
- 1971-07-22 NO NO02791/71A patent/NO127979B/no unknown
- 1971-07-23 AU AU31573/71A patent/AU459631B2/en not_active Expired
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2139515A (en) * | 1938-04-25 | 1938-12-06 | Vanadium Corp | Alloys for addition to iron and steel |
US2705196A (en) * | 1952-02-20 | 1955-03-29 | Manufacturers Chemical Corp | Process for de-oxidizing a molten metal |
US2950187A (en) * | 1958-09-05 | 1960-08-23 | Res Inst Iron Steel | Iron-calcium base alloy |
US3256087A (en) * | 1962-03-02 | 1966-06-14 | Sueddeutsche Kalkstickstoff | Production of alloys |
US3301663A (en) * | 1963-04-27 | 1967-01-31 | Hoerder Huettenunion Ag | Steel making processes |
US3364015A (en) * | 1963-06-24 | 1968-01-16 | Grace W R & Co | Silicon alloys containing rare earth metals |
US3323899A (en) * | 1964-03-10 | 1967-06-06 | Union Carbide Corp | Casting process for ferroalloys |
US3304174A (en) * | 1964-08-17 | 1967-02-14 | Res Inst Iron Steel | Low oxygen-silicon base addition alloys for iron and steel refining |
US3575695A (en) * | 1967-10-18 | 1971-04-20 | Nippon Kokan Kk | Deoxidation method of molten steel |
Non-Patent Citations (1)
Title |
---|
Metals Hdbk, 8th Ed., Vol. 1, p. 392 & Vol. 5, P. 358, ASM, 1961. * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3899320A (en) * | 1973-02-23 | 1975-08-12 | Kempten Elektroschmelz Gmbh | Process for making iron sponge pellets containing silicon carbide |
US3954446A (en) * | 1974-02-23 | 1976-05-04 | Kubota Ltd. | Method of producing high duty cast iron |
US4024322A (en) * | 1975-03-24 | 1977-05-17 | Hooker Chemicals & Plastics Corporation | Battery with silicon metal anodes |
US4306904A (en) * | 1977-10-11 | 1981-12-22 | Societe Francaise D'electrometallurgie Sofrem | Process of introducing a solid addition into a bath of liquid metal |
US4290805A (en) * | 1978-04-06 | 1981-09-22 | Compagnie Universelle D'acetylene Et D'electro-Metallurgie | Method for obtaining iron-based alloys allowing in particular their mechanical properties to be improved by the use of lanthanum, and iron-based alloys obtained by the said method |
US5002733A (en) * | 1989-07-26 | 1991-03-26 | American Alloys, Inc. | Silicon alloys containing calcium and method of making same |
US5008074A (en) * | 1990-04-26 | 1991-04-16 | American Alloys, Inc. | Inoculant for gray cast iron |
CN104831155A (zh) * | 2015-05-26 | 2015-08-12 | 新兴铸管股份有限公司 | 一种球墨铸铁管用孕育剂及其应用 |
Also Published As
Publication number | Publication date |
---|---|
IT939330B (it) | 1973-02-10 |
NO127979B (no) | 1973-09-10 |
DE2136508C3 (de) | 1981-05-21 |
DE2136508B2 (de) | 1973-12-13 |
JPS5411243B1 (no) | 1979-05-14 |
SE387371B (sv) | 1976-09-06 |
FR2109058A5 (no) | 1972-05-26 |
DE2136508A1 (de) | 1972-02-10 |
NL172344C (nl) | 1983-08-16 |
ES393532A1 (es) | 1976-03-01 |
BE770336A (fr) | 1972-01-24 |
IL37366A (en) | 1975-02-10 |
AT312647B (de) | 1974-01-10 |
IL37366A0 (en) | 1971-10-20 |
GB1301238A (no) | 1972-12-29 |
AU459631B2 (en) | 1975-04-10 |
CA973716A (en) | 1975-09-02 |
AU3157371A (en) | 1973-01-25 |
NL7110105A (no) | 1972-01-25 |
LU63594A1 (no) | 1971-12-14 |
CH526637A (fr) | 1972-08-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3765875A (en) | Inoculating alloy for cast irons | |
JPS6349723B2 (no) | ||
NO341920B1 (no) | Inokuleringsprodukter omfattende vismut og sjeldne jordarter | |
US2762705A (en) | Addition agent and process for producing magnesium-containing cast iron | |
US2269407A (en) | Addition agent and its use in the treatment of iron and steel | |
US3000731A (en) | Fine-grained steels | |
JPH0121220B2 (no) | ||
US3459541A (en) | Process for making nodular iron | |
US2675308A (en) | Art of using magnesium-containing addition agents to produce spheroidal graphite cast iron | |
JPS6338418B2 (no) | ||
US2542655A (en) | Gray cast iron | |
US3328164A (en) | Prealloy for the treatment of iron and steel melts | |
EP0041953B1 (en) | Production of vermicular graphite cast iron | |
US3717456A (en) | Alloy and method for treatment to produce spheroidal-graphite cast irons | |
US3663212A (en) | Nodular irons and method for controlling same | |
US3661566A (en) | Process for the treatment of nodular cast iron | |
US2955933A (en) | Inoculants for cast iron | |
US3306737A (en) | Magnesium and rare earth metal containing prealloy for the treatment of iron and steel melts | |
US2842437A (en) | Austenitic nodular iron | |
US2877111A (en) | Process for producing cast iron | |
SU711144A1 (ru) | Лигатура дл чугуна | |
US2750279A (en) | Process of treating cast iron with iron-fluorine compounds | |
RU1788068C (ru) | Лигатура дл стали | |
US3920451A (en) | Well workable, abrasion resistant nodular cast iron and a method of its production | |
SU1677082A1 (ru) | Лигатура дл стали |