Abstract An iron modifier containing, percent by weight; ______________________________________ Silicon 25 to 50
Rare-earth metals 20 to 40
Carbon 10 to 30
Sulphur 0.1 to 0.3
Iron the balance,
______________________________________ the components being added into liquid iron in the form of a mixture of alloys and foundry coke in the following proportions, percent by weight:______________________________________silico-mishmetal 70 to 90foundry coke 10 to 30;______________________________________ and this mixture is introduced in an amount of from 0.3 to 0.5% by weight. The modifier according to the present invention makes it possible to produce thin-walled iron castings without the formation of cementite on the surface thereof.
Inventors
👤 Lev V. Peregudov
👤 Mikhail M. Malashin
👤 Anatoly S. Naletov
👤 Nikolai S. Martynets
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-09 03:38
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
89 words
A method of using a modifier containing in percent by weight: ______________________________________
Silicon 25 to 50
Rare Earth Metals 20 to 40
Carbon 10 to 30
Sulphur 0.1 to 0.3
Iron the balance,
______________________________________ comprising the step of adding the components of said modifier into liquid iron in the form of a mixture of silico-mishmetal and foundry coke, the silico-mishmetal comprising the silicon, rare earth metals and iron, the mixture having the following proportions in percent by weight: ______________________________________
silico-mishmetal 70 to 90
foundry coke 10 to 30.
______________________________________
Claim 2
Independent Claim
89 words
A method of using a modifier containing in percent by weight: ______________________________________
Silicon 25 to 50
Rare Earth Metals 20 to 40
Carbon 10 to 30
Sulphur 0.1 to 0.3
Iron the balance,
______________________________________ comprising the step of adding the components of said modifier into liquid iron in the form of a mixture of silico-mishmetal and foundry coke, the silico-mishmetal comprising the silicon, rare earth metals and iron, the mixture having the following proportions in percent by weight: ______________________________________
silico-mishmetal 70 to 90
foundry coke 10 to 30.
______________________________________
Claim 3
Dependent Claim
25 words
A method as claimed in claim 1, wherein said modifier is added into liquid iron in an amount ranging from 0.3 to 0.5% by weight.