Lean duplex stainless steel and method for producing the same
US-2017326628-A1 · Nov 16, 2017 · US
Homogenization and heat-treatment of cast metals
US9073115B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9073115-B2 |
| Application number | US-201213649960-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 11, 2012 |
| Priority date | Oct 28, 2005 |
| Publication date | Jul 7, 2015 |
| Grant date | Jul 7, 2015 |
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Abstract
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A method of casting a metal ingot with a microstructure that facilitates further working, such as hot and cold rolling. The metal is cast in a direct chill casting mold, or the equivalent, that directs a spray of coolant liquid onto the outer surface of the ingot to achieve rapid cooling. The coolant is removed from the surface at a location where the emerging embryonic ingot is still not completely solid, such that the latent heat of solidification and the sensible heat of the molten core raises the temperature of the adjacent solid shell to a convergence temperature that is above a transition temperature for in-situ homogenization of the metal. A further conventional homogenization step is then not required. The invention also relates to the heat-treatment of such ingots prior to hot working.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of producing a metal ingot that can be hot-rolled without prior homogenization, which method comprises: casting a metal to form an ingot under conditions of temperature and time effective to produce a solidified metal having a non-cored microstructure, wherein the conditions include directing a supply of coolant liquid onto an outer surface of an embryonic ingot; causing the coolant liquid to be removed from the surface of the embryonic ingot before…
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Classifications
- B22D11/124Primary
Operations & Transport · mapped topic
Cross-Sectional Technologies · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
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Frequently asked questions
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- What does patent US9073115B2 cover?
- A method of casting a metal ingot with a microstructure that facilitates further working, such as hot and cold rolling. The metal is cast in a direct chill casting mold, or the equivalent, that directs a spray of coolant liquid onto the outer surface of the ingot to achieve rapid cooling. The coolant is removed from the surface at a location where the emerging embryonic ingot is still not compl…
- Who is the assignee on this patent?
- Novelis Inc
- What technology area does this patent fall under?
- Primary CPC classification B22D11/124. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jul 07 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).