Method and apparatus of manufacturing high strength cold rolled steel sheet
US-2015047758-A1 · Feb 19, 2015 · US
Method and apparatus of manufacturing high strength cold rolled steel sheet
US9828651B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9828651-B2 |
| Application number | US-201214386225-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 19, 2012 |
| Priority date | Mar 19, 2012 |
| Publication date | Nov 28, 2017 |
| Grant date | Nov 28, 2017 |
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Abstract
Official abstract text for this publication.
A method for manufacturing a high-strength cold-rolled steel sheet includes a temperature distribution forming step of forming a temperature distribution in a width direction of a steel sheet such that a temperature of the steel sheet increases from an end of the steel sheet in the width direction toward a center part of the steel sheet in the width direction, and a water quenching step of performing water quenching treatment on the steel sheet by immersing, in cooling water, the steel sheet on which the temperature distribution is formed in the width direction.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for manufacturing a high-strength cold-rolled steel sheet performed by using a manufacturing apparatus for manufacturing a high-strength cold-rolled steel sheet, the manufacturing apparatus disposed between an upstream gas-jet cooling zone and a downstream rapid heating device in a continuous annealing line and including a cooling facility that forms a temperature distribution in a steel sheet by spraying cooling water, the method comprising: a temperature distribution forming step of forming, by the cooling facility, a temperature distribution in a width direction of a steel sheet such that a temperature of the steel sheet increases from an end of the steel sheet in the width direction toward a center part of the steel sheet in the width direction; and a water quenching step of performing water quenching treatment on the steel sheet by immersing, in cooling water, the steel sheet on which the temperature distribution is formed in the width direction. 2. The method for manufacturing a high-strength cold-rolled steel sheet according to claim 1 , wherein the temperature distribution forming step includes a step of forming the temperature distribution in the width direction of the steel sheet such that isothermal lines on the steel sheet have a convex circular shape relative to water surface of the cooling water. 3. The method for manufacturing a high-strength cold-rolled steel sheet according to claim 1 , wherein the temperature distribution forming step includes a step of cooling both ends of the steel sheet in the width direction. 4. A manufacturing apparatus disposed between an upstream gas-jet cooling zone and a downstream rapid heating device in a continuous annealing line for manufacturing a high-strength cold-rolled steel sheet, the manufacturing apparatus comprising: a temperature distribution forming unit that forms a temperature distribution in a width direction of a steel sheet by spraying cooling water such that a temperature of the steel sheet increases from an end of the steel sheet in the width direction toward a center part of the steel sheet in the width direction; and a water quenching unit that performs water quenching treatment on the steel sheet by immersing, in cooling water, the steel sheet on which the temperature distribution is formed in the width direction by the temperature distribution forming unit.
Assignees
Inventors
Classifications
Heat-treating apparatus with a cooling or quenching zone · CPC title
Details · CPC title
Cold rolling · CPC title
Treating localised areas of an article · CPC title
Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00) · CPC title
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- What does patent US9828651B2 cover?
- A method for manufacturing a high-strength cold-rolled steel sheet includes a temperature distribution forming step of forming a temperature distribution in a width direction of a steel sheet such that a temperature of the steel sheet increases from an end of the steel sheet in the width direction toward a center part of the steel sheet in the width direction, and a water quenching step of perf…
- Who is the assignee on this patent?
- Hino Yoshimichi, Takeda Gentaro, Jfe Steel Corp
- What technology area does this patent fall under?
- Primary CPC classification C21D9/46. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 28 2017 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).