Title:
CORD STEEL WIRE ROD SUITABLE FOR DEEP DRAWING AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/056658
Kind Code:
A1
Abstract:
The present invention relates to a cord steel wire rod suitable for deep drawing and a manufacturing method therefor. The wire rod has a metallographic structure of sorbite+pearlite+ferrite, wherein the proportion of the sorbite is controlled within 60-70%, the proportion of the pearlite is controlled within 30-40%, and the ferrite exists as a small amount of tissue and has a proportion of less than or equal to 10%. The thickness of a pearlite lamella is 0.10-0.35 mm, the size of a pearlite colony is 10-20 um, and the feature of the pearlite corresponds to a smaller dislocation density. The level of central carbon segregation is evaluated according to YB/T4413 "metallographic evaluation method for central carbon segregation of high-carbon steel wire rod" and lower than or equal to level 1, and the level of network cementite in the tissue is lower than or equal to level 1. The tensile strength σ is (103762 * Ceq to 114606 * Ceq) MPa, and the reduction of area is 38% or above, such that the cord steel wire rod is more suitable for deep drawing.
Inventors:
BAI YUN (CN)
CHEN HAIYAN (CN)
ZHANG JIANFENG (CN)
LIU HAI (CN)
LI XUANJUN (CN)
ZHENG XIAOWEI (CN)
SUN YICHENG (CN)
HE JIAFENG (CN)
CHEN HAIYAN (CN)
ZHANG JIANFENG (CN)
LIU HAI (CN)
LI XUANJUN (CN)
ZHENG XIAOWEI (CN)
SUN YICHENG (CN)
HE JIAFENG (CN)
Application Number:
PCT/CN2021/123778
Publication Date:
April 13, 2023
Filing Date:
October 14, 2021
Export Citation:
Assignee:
JIANGYIN XINGCHENG GOLD MAT CO LTD (CN)
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD (CN)
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD (CN)
International Classes:
C22C38/02
Foreign References:
| CN111996349A | 2020-11-27 | |||
| CN109794515A | 2019-05-24 | |||
| CN105506479A | 2016-04-20 | |||
| CN112620385A | 2021-04-09 | |||
| CN109735773A | 2019-05-10 | |||
| CN111069280A | 2020-04-28 | |||
| CN105331895A | 2016-02-17 | |||
| CN111893383A | 2020-11-06 | |||
| JPH05117984A | 1993-05-14 |
Attorney, Agent or Firm:
JIANGYIN QING ZHOU PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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