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US 4,400,222 AGranted
Method for treating surfaces
AssigneeHitachi Metals, Ltd.
InventorNorimasa Uchida
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AssigneeHitachi Metals, Ltd.
InventorNorimasa Uchida
Estimating the term…
A method for treating surfaces is provided, in which a material to be treated, such as iron, iron alloys or the like is immersed in a molten bath prepared by adding 5 to 50 weight % of a metal cementing agent consisting of one or more selected from the group consisting of a Group Va element, a substance containing the Group Va element, a Group VIa element and a substance containing the Group VIa element to a salt bath agent consisting of a neutral salt containing 5 to 30 mol % of a borate admixed therewith, to form the carbide of the Group Va element or Group VIa element or the composite carbide of these elements on the surfaces of the material. To the molten bath there may be optionally added 1 to 10 weight % of an adjuvant consisting of one or more selected from the group consisting of the oxysalts of the Groups IVa, Va and VIa elements and/or 1 to 10 weight % of a metal or an alloy thereof selected from the group consisting of a Group IVa metal and an alloy thereof.
A surface-treating method for forming the carbide or composite carbide of a Group Va element and/or Group VIa element on the surface of an iron or iron alloy material to be treated, characterized by immersing said material in a molten bath prepared by adding to (i) a salt bath agent consisting of a mixture of BaCl.sub.2 and 5 to 15 mol % of Na.sub.2 B.sub.4 O.sub.7, (ii) 5 to 50 weight % of a metal cementing agent consisting of one or more substances selected from the group consisting of the Group Va element, a substance containing the Group Va element, the Group VIa element and a substance containing the Group VIa element.
A surface-treating method for forming the carbide of a Group Va element and/or Group VIa element on the surface of an iron or iron alloy material to be treated, characterized by immersing said material into a molten bath prepared by adding to (i) a salt bath agent consisting of a mixture of BaCl.sub.2 and 5 to 15 mol % of Na.sub.2 B.sub.4 O.sub.7, (ii) 5 to 50 weight % of a metal cementing agent consisting of one or more substances selected from the group consisting of the Group Va element, a substance containing the Group Va element, the Group VIa element and a substance containing the Group VIa element and (iii) an adjuvant consisting of one or more substances selected from the group consisting of the oxysalts of Groups IVa, Va and VIa elements.
A surface-treating method for forming the composite carbide of a Group Va element or Group VIa element and Group IVa element on the surface of an iron or iron alloy material to be treated, characterized by immersing said material into a molten bath prepared by adding to (i) a salt bath agent consisting of a mixture of BaCl.sub.2 and 5 to 15 mol % of Na.sub.2 B.sub.4 O.sub.7, (ii) 5 to 40 weight % of a metal cementing agent consisting of one or more substances selected from the group consisting of the Group Va element, a substance containing the Group Va element, the Group VIa element and a substance containing the Group VIa element, and (iii) 1 to 10 weight % of one or more substances selected from the Group IVs metal and alloys thereof.
A surface-treating method for forming either (a) the composite carbide of a Group Va element or Group VIa element and a Group IVa element or (b) a composite carbide of a Group Va element, a Group VIa element and a Group IVa element on the surface of iron or iron alloy material to be treated, characterized by immersing said material into a molten salt bath prepared by adding to (i) a salt bath agent consisting of a mixture of BaCl.sub.2 and 5 to 15 mol % of Na.sub.2 B.sub.4 O.sub.7, (ii) 5 to 40 weight % of a metal cementing agent consisting of one or more substances selected from the group consisting of the Group Va element, a substance containing the Group Va element, the Group VIa element and a substance containing the Group VIa element, (iii) 2 to 10 weight % of an adjuvant consisting of one or more substances selected from the group consisting of the oxysalts of Groups IVa, Va and VIa elements and (iv) 1 to 10 weight % of one or more substances selected from the group consisting of the Group IVa metal and alloys thereof.
Dependencies are inferred from the claim text.