Method for hot shaping a workpiece and agent for reducing the heat emission

• US 8,685,298 B2
• Filed: 06/04/2010
• Issued: 04/01/2014
• Est. Priority Date: 06/05/2009
• Status: Active Grant

• Current Assignee: Boehler Schmiedetechnik GmbH & Co. KG
• Original Assignee: Boehler Schmiedetechnik GmbH & Co. KG
• Inventors: Rockenschaub, Karin, Marketz, Wilfried
• Primary Examiner(s): HAUTH, GALEN H
• Application Number:
  US12/794,233
• Publication Number:
  US 20100308491A1
• Time in Patent Office: 1,397 Days
• Field of Search: 264/129, 264/131, 264/134, 264/239, 106/1.05, 427/446, 427/453
• US Class Current: 264/134
• CPC Class Codes: B21B 45/00 Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills B21B15/00, B21B1/227 and B21B27/005 take precedence; technical features of scaling-off devices B21C43/00
• CPC Class Codes: B21B 45/008 Heat shields
• CPC Class Codes: B21J 1/06 Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations B21J5/063 takes precedence
• CPC Class Codes: B21J 3/00 Lubricating during forging or pressing lubricating in general F16N
• CPC Class Codes: C21D 1/70 while heating or quenching
• CPC Class Codes: C21D 2221/00 Treating localised areas of an article
• CPC Class Codes: C21D 8/0284 Application of a separating or insulating coating
• CPC Class Codes: C22F 1/183 of titanium or alloys based thereon
• CPC Class Codes: Y02P 70/10 Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
• CPC Class Codes: Y10T 29/49982 Coating

Abstract

A process for hot shaping a workpiece of metal or an intermetallic compound at a temperature of higher than about 1000° C. The method comprises at least partially coating the surface of the workpiece with a coating agent that comprises an oxide phase and an additive and/or an adhesive before processing the workpiece into a formed body or a rolling product. A coating agent for reducing the heat emission from the workpiece comprises a predominant amount of an oxide phase. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Claims

1. A process for hot shaping through solid-blank forming a workpiece or raw material of metal or of an intermetallic compound at a temperature of higher than about 1000°

C., wherein the process comprises

(a) at least partially coating a surface of the workpiece or raw material with a coating agent that comprises

     1) an oxide phase,

     2) at least one of an additive and an adhesive, and

     3) at least one liquid component at a temperature of from more than about 100°

C. to approximately 200°

C.,

(b) allowing the coating thus applied to solidify,

(c) subsequently preheating with through-heating the coated workpiece or raw material to deforming temperature and transferring same to a shaping device, and

(d) processing the workpiece or raw material with the shaping device into a formed body or a rolling product.

2. The process of claim 1, wherein the workpiece is at least one of forged and rolled.

3. The process of claim 1, wherein a temperature of the surface of the workpiece or raw material to be coated is higher than about 100°

C.

4. The process of claim 3, wherein the temperature is about 200°

C.

5. The process of claim 1, wherein in (i) the workpiece or raw material is at least one of immersed into the coating agent and sprayed with the coating agent.

6. The process of claim 1, wherein a solidified layer thickness of the coating is greater than about 0.1 mm.

7. The process of claim 6, wherein the thickness is from about 0.3 mm to about 3 mm.

8. The process of claim 1, wherein the at least one liquid component comprises sodium silicate.