Title:
STEEL PLATE FOR BOX OF LARGE MINING DUMP TRUCK IN EXTREMELY COLD ZONE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/022530
Kind Code:
A1
Abstract:
A steel plate for a box of a large mining dump truck in an extremely cold zone and a manufacturing method therefor. The steel plate is divided into a composite-layer steel plate and a base-layer steel plate. The composite-layer steel plate and the base-layer steel plate are metallurgically bonded. The composite-layer steel plate comprises the following chemical components: 0.19-0.29 wt.% of C; 0.15-0.75 wt.% of Si; 0.55-1.55 wt.% of Mn; 0.10-0.70 wt.% of Cr; less than or equal to 0.030 wt.% of P; less than or equal to 0.010 wt.% of S; 0.010-0.060 wt.% of Al; 0.0005-0.0050 wt.% of B; any one or more selected from 0.01-0.60 wt.% of Mo, 0.01-0.08 wt.% of RE, 0.005-0.060 wt.% of Nb, 0.01-0.10 wt.% of V, and 0.005-0.060 wt.% of Ti; and the balance of Fe and inevitable impurities. The base-layer steel plate comprises the following chemical components: 0.08-0.13 wt.% of C; 0.15-0.55 wt.% of Si; 0.70-1.70 wt.% of Mn; 0.05-0.55 wt.% of Cr; 0.10-0.55 wt.% of Mo; 1.25-2.55 wt.% of Ni; less than or equal to 0.030 wt.% of P; less than or equal to 0.010 wt.% of S; 0.010-0.080 wt.% of Al; 0.0005-0.0050 wt.% of B; any one or more selected from 0.01-0.08 wt.% of RE, 0.005-0.060 wt.% of Nb, 0.01-0.10 wt.% of V, and 0.005-0.060 wt.% of Ti; and the balance of Fe and inevitable impurities. By means of the design of the steel element components, the composite-layer steel plate has relatively high strength and hardness, and the base-layer steel plate has excellent low-temperature toughness while having relatively high strength and hardness. According to the steel plate compounded by a rolling process, the steel plates of the layers are metallurgically bonded, so that the integrity of the steel plate can be ensured, and the characteristics of the steel plates of the layers can be exerted, and thus, the whole composite plate has excellent comprehensive mechanical properties. In addition, the contents of carbon and alloy elements are controlled, thereby reducing the carbon equivalent, thus ensuring that the steel plate has good welding performance.
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Inventors:
LI HONGBIN (CN)
DING JIANHUA (CN)
JIAO SIHAI (CN)
DING JIANHUA (CN)
JIAO SIHAI (CN)
Application Number:
PCT/CN2023/110173
Publication Date:
February 01, 2024
Filing Date:
July 31, 2023
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/32; C21D1/18; C21D8/00; C21D8/02; C22C38/14
Foreign References:
| CN103882317A | 2014-06-25 | |||
| CN104480406A | 2015-04-01 | |||
| CN109694986A | 2019-04-30 | |||
| CN107541658A | 2018-01-05 | |||
| CN103342020A | 2013-10-09 | |||
| CN110527907A | 2019-12-03 | |||
| CN108085585A | 2018-05-29 | |||
| US4645720A | 1987-02-24 |
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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