Title:
MOORING CHAIN STEEL AND PRODUCTION METHOD THEREFOR, AND MOORING CHAIN AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/160613
Kind Code:
A1
Abstract:
The present invention relates to a mooring chain steel and a production method therefor. The mooring chain steel comprises the following components, in percentages by mass: C: 0.18-0.32, Mn: 1.95-2.60, Si: 0.15-0.50, Cr: 0.45-1.20, Mo: 0.008-0.250, Ni: 0.02-1.20, Cu≤0.40, S≤0.005, Al: 0.005-0.250, (V+Ti+Nb)≤0.35, (Sn+As+Sb)≤0.06, N: 0.004-0.024, O≤0.002, H≤0.00015 and the balance of Fe and inevitable impurities. On the basis of improving the cost performance of R3, R4 and R4S grade mooring steel, by utilizing a river-bay effect of a continuous cooling curve of structural steel influenced by Mn, namely similar to the influence rule of Mo, as the content of alloy Mn is increased to a certain amount, the continuous cooling curve of the steel begins to appear in a river bend shape, a component system for increasing cheap elements Mn and Al and reducing precious elements Mo and Ni is designed, and by means of trial production of the steel and a chain, the effects of reducing the cost of a chain product and improving the strength and toughness thereof are achieved. The present invention also relates to a mooring chain and a production process therefor.
Inventors:
YIN JIANG (CN)
GAO XIN (CN)
QIU HAIDONG (CN)
GAO XIN (CN)
QIU HAIDONG (CN)
Application Number:
PCT/CN2023/077888
Publication Date:
August 31, 2023
Filing Date:
February 23, 2023
Export Citation:
Assignee:
SHANGHAI BAINITE CHAIN MAT TECH CO LTD (CN)
JIANGYIN NANGONG FORGED CO LTD (CN)
JIANGYIN NANGONG FORGED CO LTD (CN)
International Classes:
B23P15/00; C22C38/02; B63B21/10; C22C33/04; C22C38/06; C22C38/42; C22C38/44; C22C38/46; C22C38/48; C22C38/50; C22C38/58; C22C38/60
Domestic Patent References:
| WO2021169941A1 | 2021-09-02 |
Foreign References:
| CN114438420A | 2022-05-06 | |||
| CN103114255A | 2013-05-22 | |||
| CN101519751A | 2009-09-02 | |||
| CN104962832A | 2015-10-07 | |||
| CN109023118A | 2018-12-18 | |||
| CN110983205A | 2020-04-10 |
Attorney, Agent or Firm:
BEIJING FINELAND IP FIRM (CN)
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