Patent ID: 6261639
Filing Date: 2001-07-17
Classification: B21B,C21D

Abstract:
A process for hot-rolling a stainless steel slab, comprising heating a stainless steel slab containing at least about 10 weight percent chromium in a heating furnace and hot-rolling the slab; wherein prior to said heating a surface treatment composition is applied to at least one surface of said slab, said composition comprising a mixture of (a) at least one member selected from the group consisting of a Ca compound and a Ba compound and (b) a binder for binding the mixture to a slab surface and for forming a coating film, wherein the binder comprises at least one member selected from the group consisting of a Si compound and a B compound, and wherein the surface treatment composition has a composition satisfying the relationship2.ltoreq.(1.4Ca+1.1Ba)/(2.1Si+3.2B).ltoreq.10wherein Ca, Ba, Si and B indicate the elemental Ca, Ba, Si and B contents by weight percent contained in the surface treatment composition, respectively.