# US 2013/0153094 A1 · Method for hot forming a coated metal part and formed part > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153094 A1 - Document ID: US20130153094A1 - Status: Published application - Kind: A1 - Application number: 13/818,041 - Filed: 2011-07-19 - Published: 2013-06-20 - Earliest claimed: 2010-08-31 - Assignees: Tata Steel Ijmuiden B.V. - Inventors: Willem Cornelis Verloop; Marc Jacco van Genderen; Ronald Theodoor van Tol; Guido Cornelis Hensen; Jenny Loiseaux - Web page: https://patentgrep.com/patent/US20130153094A1 ## CPC - C21D 8/0247: characterised by the heat treatment - B32B 15/013: {one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium} - C21D 1/673: for die quenching - C21D 8/02: during manufacturing of plates or strips (C21D8/12 takes precedence) - C21D 8/0447: {characterised by the heat treatment} - C21D 9/46: for sheet metals - C21D 9/48: deep-drawing sheets - C22C 18/00: Alloys based on zinc - C22C 18/04: with aluminium as the next major constituent - C22C 38/002: {containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60} - C22C 38/02: containing silicon - C22C 38/04: containing manganese - C23C 10/28: using solids, e.g. powders, pastes - C23C 10/60: After-treatment - C21D: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F17/00; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - C22C: ALLOYS (treatment of alloys C21D, C22F) - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) ## Abstract A method for manufacturing a coated part having very high mechanical properties using hot forming techniques. The method includes:—providing an annealed steel strip or blank or pre-shaped part that was coated with a metal or metal alloy before the annealing—if a strip is provided, cutting a blank from the strip before or after the annealing—optionally forming a pre-shaped part from the blank—heating the blank or preshaped part to a temperature of 500° C. at an average heating rate of 16° C./s or more—further heating the blank or pre-shaped part to a temperature between 700 and 1000° C.—hot forming the blank or preshaped part into a hot formed part—hardening the hot formed part. A method for manufacturing a coated steel strip, blank or pre-shaped part, and a coated steel strip, blank or part and a hot formed part. ## Claims ### Claim 1 Method for manufacturing a coated part having very high mechanical properties using hot forming techniques, comprising the following steps: 1. providing an annealed steel strip or blank or pre-shaped part that has been coated with zinc or a zinc alloy before the annealing 2. if a strip is provided, cutting a blank from the strip before or after the annealing 3. optionally forming a pre-shaped part from the blank 4. heating the blank or pre-shaped part to a temperature of 500° C. at an average heating rate of 16° C./s or more 5. further heating the blank or pre-shaped part to a temperature between 700 and 1000° C. 6. hot forming the blank or pre-shaped part into a hot formed part 7. hardening the hot formed part, wherein before the blank or pre-shaped part is taken out of an oven and put in a hot-forming apparatus, the heating of the blank or pre-shaped part is performed within 3 minutes. ### Claim 2 (depends on 1) Method for manufacturing a coated part according to claim 1, wherein the blank or pre-shaped part in step 4 is heated to a temperature of 625° C. at an average heating rate of 16° C./s or more. ### Claim 3 (depends on 1) Method for manufacturing a coated part according to claim 1, wherein the blank or pre-shaped part in step 4 is heated to a temperature of 700° C. at an average heating rate of 16° C./s or more. ### Claim 4 (depends on 1) Method for manufacturing a coated part according to claim 1, wherein the blank or pre-shaped part in step 4 is heated to a temperature between 700 and 900° C. at an average heating rate of 16° C./s or more. ### Claim 5 (depends on 1) Method according to claim 1, wherein the coating on the blank or pre-shaped part remains solid during step 4 and step 5. ### Claim 6 (depends on 1) Method according to claim 1, wherein in step 4 the blank or pre-shaped part is heated at an average heating rate of at most 50° C./s. ### Claim 7 (depends on 1) Method according to claim 1, wherein the steel has the following composition in weight percent: 0.1