PROTECTIVE TECHNOLOGICAL COVER FOR STEEL AND ALLOY Russian patent published in 2007 - IPC C03C8/02 

FIELD: protective materials.

SUBSTANCE: invention relates to protective technological covers for protection of steels and alloys in technological heat and thermal and mechanical treatment by pressure in the process for manufacturing articles. Proposed protective technological covers for steels and alloys comprises the following components, wt.-%: SiO₂, 23-55; MgO, 6.5-20.0; Na₂O, 0.5-6.5; 3 CaO x Al₂O_3, 1,5-8.0; MgO x ZrO₂, 0.5-2.5; Al₂O₃ x MgO, 1.0-1.5, and Al₂O₃, the balance. Invention provides decreasing cohesive of cover to steels and alloys and increasing temperature resistance up to 1100⁰C.

EFFECT: improved and valuable properties of cover.

2 tbl, 4 ex