Title:
NITROGEN-CONTAINING MICROALLOYING SPRING STEEL AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/080457
Kind Code:
A1
Abstract:
A nitrogen-containing microalloying spring steel and the preparation method therefor. The chemical components are: C 0.45-0.52％; Si 0.15-0.35％; Mn 0.90-1.10％; Cr 0.90-1.15％; Mo 0.10-0.25％; V 0.10-0.20％; Nb 0.025-0.04％; N 0.007-0.012％; Pb, Sn, Zn, Sb and Bi≤0.03％; O2 and H2≤25ppm; S and P≤0.02％; Cu≤0.2％; Ni≤0.35％; and a balance of Fe. The spring steel features high mechanical strength, a large extension rate, high reduction of area, and good anti-fatigue performance.
Inventors:
FENG SIMON YISHENG (CN)
WANG ZHENGHONG (CN)
WANG ZHENGHONG (CN)
Application Number:
PCT/CN2018/082189
Publication Date:
May 02, 2019
Filing Date:
April 08, 2018
Export Citation:
Assignee:
SHANDONG AUTOMOBILE SPRING FACTORY ZIBO CO LTD (CN)
International Classes:
C22C38/44; C22C33/04; C22C38/04; C22C38/46; C22C38/48; B21C37/02
Foreign References:
| CN107587079A | 2018-01-16 | |||
| CN105112774A | 2015-12-02 | |||
| JP2017179596A | 2017-10-05 | |||
| US20020119070A1 | 2002-08-29 |
Attorney, Agent or Firm:
QINGDAO FIRST PATENT & TRADEMARK AGENT CO., LTD. (CN)
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