| 摘要 |
The process for coating a bake hardening steel substrate (S), comprises continuously depositing a layer of metal alloy containing two metal elements on the substrate using a vacuum deposition installation (1). The vacuum deposition installation comprises a unit for coating the substrate using steam jet, which allows to project a vapor containing metal elements in a predetermined and constant proportion with sonic speed on the substrate. The vapor containing metal elements is obtained by evaporation of a metal alloy bath having metal elements in a predetermined initial proportion. The process for coating a bake hardening steel substrate (S), comprises continuously depositing a layer of metal alloy containing two metal elements on the substrate using a vacuum deposition installation (1). The vacuum deposition installation comprises a unit for coating the substrate using steam jet, which allows to project a vapor containing metal elements in a predetermined and constant proportion with sonic speed on the substrate. The vapor containing metal elements is obtained by evaporation of a metal alloy bath having metal elements in a predetermined initial proportion, where the initial proportion of bath is maintained constant during deposition. The metal alloy layer is constituted of zinc-magnesium phase. Initially a predetermined proportion of magnesium is 30-50 wt.% in the metal alloy layer, after evaporation the predetermined proportion of magnesium is 4-18 wt.%, where the initial proportion is maintained constant during the deposition. The metal elements have the evaporation temperatures of which a deviation does not exceed 100[deg] C to a chosen evaporation pressure. A thickness of the metal alloy layer is 0.1-20 mu m. Independent claims are included for: (1) an installation for continuous vacuum deposition of coatings formed of metal alloy having metal elements on a substrate; and (2) a zinc based ingot. |
