Title:
MICRO-ALLOYED SPRING STEEL AND PREPARATION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2019/080458
Kind Code:
A1
Abstract:
Provided are a micro-alloyed spring steel and a preparation method thereof. The chemical composition of the spring steel is: C: 0.48-0.55%; Si: 0.15-0.35%; Mn: 0.95-1.20%; Cr: 1.00-1.25%; Mo: 0.15-0.25%; V: 0.15-0.25%; Nb: 0.03-0.05%; Pb, Sn, Zn, Sb and Bi≤0.03%; O 2 and H 2≤25ppm; S and P ≤ 0.02%; Cu≤0.2％; Ni≤0.35％; the remainder being Fe. The preparation method is as follows: smelting, refining, vacuum degassing, continuous casting and cooling into steel ingots, steel ingot stripping, heating and continuous rolling, controlled cooling, quenching and tempering, so as to obtain spring steel products.
Inventors:
FENG SIMON YISHENG (CN)
WANG ZHENGHONG (CN)
WANG ZHENGHONG (CN)
Application Number:
PCT/CN2018/082190
Publication Date:
May 02, 2019
Filing Date:
April 08, 2018
Export Citation:
Assignee:
SHANDONG AUTOMOBILE SPRING FACTORY ZIBO CO LTD (CN)
International Classes:
C22C38/18; C21D9/02
Foreign References:
| CN107557671A | 2018-01-09 | |||
| CN1804090A | 2006-07-19 | |||
| CN105401073A | 2016-03-16 | |||
| JPH02217421A | 1990-08-30 |
Attorney, Agent or Firm:
QINGDAO FIRST PATENT & TRADEMARK AGENT CO., LTD. (CN)
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