The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 2024
Filed:
Sep. 20, 2018
Baosteel Zhanjiang Iron & Steel Co., Ltd, Guangdong, CN;
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
BAOSTEEL ZHANJIAN IRON & STEEL CO., LTD., Guangdong, CN;
BAOSHAN IRON & STEEL CO., LTD., Shanghai, CN;
Abstract
There is disclosed a softening method for a high-strength Q & P steel hot-rolled coil, comprising: after heating a Q & P steel ingot, subjecting it to rough rolling, finish rolling, laminar cooling and coiling to obtain a hot-rolled coil; after unloading the coil, covering the coil on-line with an insulating enclosure and moving it into a steel coil warehouse along with a transport chain; after a specified period of insulating time, removing the coil from the insulating enclosure, and cooling it to room temperature in air, wherein the coiling is performed at a temperature of 400-600° C.; said covering on-line with an insulating enclosure means each hot-rolled coil is individually covered with an independent, closed insulating enclosure unit within 60 minutes after unloading; the insulating time of the steel coil in the insulating enclosure is ≥60 minutes. The inventive method replaces the intermediate annealing step in the production process of cold-rolled Q & P steel. The inventive method has low cost and high efficiency, and it is not affected by the surrounding environment.