Title:
METHOD FOR PRODUCING FREE-CUTTING STEEL HOT-ROLLED WIRE ROD FOR OA SHAFT
Document Type and Number:
WIPO Patent Application WO/2022/083217
Kind Code:
A1
Abstract:
The present invention pertains to the technical field of ferrous metallurgy, and relates to a method for producing a free-cutting steel hot-rolled wire rod for an OA shaft. According to the present invention, appropriate chemical components have been designed so as to ensure that a wire rod met machinability and mechanical property requirements. Process conditions of converter-based smelting, LF furnace-based refining, continuous casting machine-based continuous casting, billet rolling, billet finishing, rolling of finished wire rods, and wire rod packaging and protection are defined. For example, conditions in a rolling process are defined, such as a heating temperature, a heating time, a finishing rolling temperature, a sizing temperature, a spinning temperature, a cooling process, etc., such that the produced free-cutting steel hot-rolled wire rod for the OA shaft has chemical components that conform to standards, good surface quality, excellent machinability, and good product stability, and meets requirements of a downstream user in terms of machinability and surface quality stability. Therefore, eventual OA shaft products such as printer shafts, copier shafts, fax machine shafts, camera shafts, and the like acquired by means of machining have good stability, and meet requirements for flaw detection.
Inventors:
ZHOU MIAO (CN)
ZHANG SHENGHUA (CN)
SU ZHENWEI (CN)
ZHANG SHENGHUA (CN)
SU ZHENWEI (CN)
Application Number:
PCT/CN2021/109958
Publication Date:
April 28, 2022
Filing Date:
August 02, 2021
Export Citation:
Assignee:
ZENITH STEEL GROUP CO LTD (CN)
CHANGZHOU ZENITH SPECIAL STEEL CO LTD (CN)
CHANGZHOU ZENITH SPECIAL STEEL CO LTD (CN)
International Classes:
C21D8/06; C22C38/02; C22C33/04; C22C38/04
Foreign References:
| CN112342464A | 2021-02-09 | |||
| CN103667877A | 2014-03-26 | |||
| CN106191650A | 2016-12-07 | |||
| CN109518076A | 2019-03-26 | |||
| JPH03226545A | 1991-10-07 |
Attorney, Agent or Firm:
CHANGZHOU INNOVATION PATENT AGENCY (CN)
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