Title:
METHOD FOR PREPARING SPECIAL HIGH WEAR-RESISTANCE STEEL STRIP NGNM01 FOR PIPELINE TRANSPORTATION
Document Type and Number:
WIPO Patent Application WO/2023/071776
Kind Code:
A1
Abstract:
The present invention discloses a method for preparing a special high wear-resistance steel strip NGNM01 for pipeline transportation, and relates to the technical field of steel production. By means of a strict "triple-control operation" production process for steel rolling, the purposes of high steel purity, good structure uniformity and few decarburized layers on the surface are achieved. NGNM01 has high wear resistance, and the Rockwell hardness thereof after quenching and tempering reaches 62-65 HRC; 90º bending detection shows that NGNM01 has good toughness; in a high-speed friction environment, NGNM01 can work at -40 to 250ºC and has high contact fatigue resistance; and NGNM01 has stable performance and strong market competitiveness. By means of eccentric bottom tapping, the amount of roughing slag is greatly reduced, such that the oxidability of molten steel is greatly reduced; therefore, the yield of alloy elements can be increased, the utilization amount of a carburant is reduced, the production cost is lowered, and the purposes of reducing the content of inclusions in steel and improving the purity of the molten steel can be achieved.
Inventors:
XU XIAOCHUN (CN)
WANG PANFENG (CN)
WANG BIN (CN)
TAN YAZE (CN)
LI YINGKUI (CN)
WANG PANFENG (CN)
WANG BIN (CN)
TAN YAZE (CN)
LI YINGKUI (CN)
Application Number:
PCT/CN2022/124585
Publication Date:
May 04, 2023
Filing Date:
October 11, 2022
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C22C33/06; B21B1/22; C21C7/10; C21D1/74; C21D8/02
Foreign References:
| CN114182159A | 2022-03-15 | |||
| CN112481549A | 2021-03-12 | |||
| US20170029919A1 | 2017-02-02 |
Other References:
WEN XIAODE: "Development of Large Size Bearing Steel GCr15SiMn", SHANDONG METALLURGY, XX, CN, vol. 36, no. 05, 20 October 2014 (2014-10-20), CN , pages 14 - 16, XP009545186, ISSN: 1004-4620, DOI: 10.16727/j.cnki.issn1004-4620.2014.05.013
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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