FIELD: technological processes.
SUBSTANCE: invention relates to metallurgy, particularly, to protective additive for molding mixes used in shaped molding of magnesium alloys into sand molds. Additive contains, wt%: hexamethylenetetramine borate 10–14, potassium tetrafluoroborate 8–12, sulfur 4–8 and urea is the rest.
EFFECT: improved physical and mechanical and operational characteristics of molding mixtures of foundry molds of magnesium casting.
1 cl, 3 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| PARTING ADDITIVE FOR MOLDING SAND | 2002 |
|
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SU624715A1 |
