US 12,359,293 B2 · Coated steel substrate, a method for the manufacture of a coated steel substrate, a method for manufacture of a steel product and a steel product

Abstract

A coated steel substrate coated with a first coating including above 40 wt. % of chromium and optionally one or several elements chosen from yttrium, silicon, calcium, titanium, zirconium, vanadium, niobium and nickel in an amount below 10 wt. % for each element, the balance being chromium and a second coating including from 2 to 30 wt. % of Aluminum, from 10 to 40 wt. % of chromium and optionally one or several elements chosen from yttrium, silicon, calcium, titanium, zirconium, vanadium, niobium and nickel in an amount below 10 wt. % for each element, the balance being iron, the steel substrate including Cr≤2.0% by weight; a method for the manufacture of this coated steel substrate; a method for the manufacture of a coated hot steel product; a coated hot steel product and the use of a hot steel product.

Claims24

Dependent claims

A coated steel substrate comprising:

a steel substrate comprising Cr≤2.0% by weight;
a first coating including above 40 wt. % of chromium, 0% >=yttrium<10%, 0%>=silicon<10%, 0%>=calcium<10%, 0%>=titanium<10%, 0%>=zirconium<10%, 0%>=vanadium<10%, 0%>=niobium<10%, and 0% >=nickel<10%, a first coating balance being chromium;
and
a second coating including from 2 to 30 wt. % of aluminum, from 10 to 40 wt. % of chromium, 0% >=yttrium<10%, 0%>=silicon<10%, 0%>=calcium<10%, 0%>=titanium<10%, 0%>=zirconium<10%, 0%>=vanadium<10%, 0%>=niobium<10%, and 0% >=nickel<10%, a second coating balance being iron.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/439,506Filed 20 Mar 2020

Priority

WO PCT/IB2019/05226020 Mar 2019

Published

US 2022/0154326 A119 May 2022

Granted

15 Jul 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification14 codes

C23C 2/00
Hot-dipping or immersion processes for applying the coating material in the molten
C22C 38/02
Ferrous alloys, e.g. steel alloys: containing silicon
C22C 38/04
Ferrous alloys, e.g. steel alloys: containing manganese
C22C 38/06
Ferrous alloys, e.g. steel alloys: containing aluminium

Coated steel substrate, a method for the manufacture of a coated steel substrate, a method for manufacture of a steel product and a steel product

Life of this patent

Coated steel substrate, a method for the manufacture of a coated steel substrate, a method for manufacture of a steel product and a steel product

Life of this patent

Abstract

Claims24