FIELD: metallurgy.
SUBSTANCE: method involves loading to a reaction chamber of a pouring gate system of modifying agent charge in the form of Fe-Si-REM alloy combination providing initial concentration of rare-earth metals in molten cast-iron of 0.075%; then, after the casting mould is assembled, a lump of FS75 with the weight of 0.24-0.46% of metal consumption of the mould is laid in its pouring basin for graphitising pre-modification, and it is filled with molten cast-iron from the furnace.
EFFECT: stable obtainment in the cast-iron structure of fully vermicular shape of graphite throughout the surface area of all the casting sections without formation of any inclusions of free cementite.
6 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PROCEDURE FOR CRUMBLING GRAPHITE INCLUSIONS IN HIGH STRENGTH IRON | 2008 |
|
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| METHOD FOR PRODUCING HIGH-TENSILE SPHEROIDAL CAST IRON | 0 |
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| CONTROL MODE OF PROCESS FOR MANUFACTURING GRAPHITE AND HIGH-DUTY CAST IRON WITH GLOBULAR AND VERMICULAR GRAPHITE FOR CASTING RECEIVING | 2006 |
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| CAST IRON PRODUCTION METHOD | 1993 |
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| METHOD OF MAKING VERMICULAR GRAPHITE CAST IRON | 1990 |
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| cast iron | 1998 |
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RU2138576C1 |
| MODIFYING MIXTURE | 0 |
|
SU1027261A1 |
| MASTER ALLOY | 0 |
|
SU1081230A1 |
| METHOD OF PRODUCING HIGH-STRENGTH CAST IRON | 2015 |
|
RU2586730C1 |
