450HB-grade rare earth high-wear-resistance steel plate

A high wear resistance, rare earth technology, applied in the field of 450HB rare earth high wear resistance steel plate, can solve the problems of uncharacterized wear resistance, achieve high strength, refine the microstructure in the hot-rolled state, and ensure stability Effect

Pending Publication Date: 2021-07-13
BAOTOU IRON & STEEL GRP
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this document W3 does not specifically characterize its wear resistance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 450HB-grade rare earth high-wear-resistance steel plate
  • 450HB-grade rare earth high-wear-resistance steel plate
  • 450HB-grade rare earth high-wear-resistance steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] See Table 1 for the weight percentage of the chemical composition of the steel plate. The exit temperature of the slab heating furnace is 1210°C, two-stage rolling is adopted, and the rough rolling start temperature is 1160°C. The finish rolling temperature is 835°C, cooled to 680°C after rolling, and the thickness of the intermediate billet is 3 times the thickness of the finished product. Quenching process: 890 ℃, heat preservation 20min quenching; tempering process: 230 ℃, heat preservation 30min air cooling. Finally, the steel plate BTNM450-1 can be obtained.

Embodiment 2

[0032] See Table 1 for the weight percentage of the chemical composition of the steel plate. The heating furnace temperature of the slab is 1205°C, and the slab is rolled in time after heating. Two-stage rolling is adopted, and the starting temperature of rough rolling is 1150°C. The finish rolling temperature is 830°C, cooled to 650°C after rolling, and the thickness of the intermediate billet is 3 times the thickness of the finished product. Quenching process: 905 ℃, heat preservation 25min quenching; tempering process: 220 ℃, heat preservation 50min air cooling. Finally, the steel plate BTNM450-2 can be obtained, and its metallographic structure transmission electron microscope photo is as follows figure 1 and figure 2 shown.

Embodiment 3

[0034] See Table 1 for the weight percentage of the chemical composition of the steel plate. The heating furnace temperature of the slab is 1200°C, and the slab is rolled in time after heating. Two-stage rolling is adopted, and the starting temperature of rough rolling is 1140°C. The finish rolling temperature is 840°C, cooled to 630°C after rolling, and the thickness of the intermediate billet is 3 times the thickness of the finished product. Quenching process: 920°C, heat preservation 30min quenching; tempering process: 220°C, heat preservation 70min air cooling. Finally, the steel plate BTNM450-3 can be obtained.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Surface brinell hardnessaaaaaaaaaa
Average wearaaaaaaaaaa
Login to view more

Abstract

The invention discloses a 450HB-grade rare earth high-wear-resistance steel plate. The steel plate comprises the following chemical components in percentage by mass: 0.18 to 0.21 percent of C, 0.20 to 0.50 percent of Si, 1.10 to 1.40 percent of Mn, less than or equal to 0.012 percent of P, less than or equal to 0.002 percent of S, 0.40 to 0.90 percent of Cr, 0.008 to 0.018 percent of Ti, 0.0010 to 0.0020 percent of B, 0.15 to 0.50 percent of Mo, 0.15 to 0.30 percent of Ni, less than or equal to 0.0035 percent of Ce, 0.025 to 0.04 percent of Als, 0.56 to 0.69 percent of CEV, and the balance Fe and inevitable impurities. The steel plate provided by the invention has excellent wear resistance, and under the same condition, the wear loss can reach 85% or below of the wear loss of a same-grade steel plate in the prior art.

Description

technical field [0001] The invention belongs to the field of quenched and tempered rare earth high-strength wear-resistant steel plates, in particular to a 450HB grade rare earth high wear-resistant steel plate, in particular to a 450HB rare earth high wear-resistant steel plate for a coal scraper. Background technique [0002] The working conditions and environment in the process of coal mining and transportation are extremely complex. During the service process, the steel plate is faced with the synergistic effect of multi-factor wear (or corrosion) such as coal, gangue, environmental media (temperature, humidity, corrosive atmosphere) and load stress. The working conditions of different mines are very different: under normal working conditions, the gangue content is about 10%, with normal temperature and humidity; while under harsh working conditions, the gangue content can reach 50%, the underground temperature is as high as 40°C, and the humidity is above 90%. The wear ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22C38/02C22C38/04C22C38/50C22C38/44C22C38/54C22C38/06C22C33/06C21D8/02C21D1/18
CPCC22C38/02C22C38/04C22C38/50C22C38/44C22C38/54C22C38/06C22C38/005C22C33/06C21D8/0226C21D1/18C21D2211/008C21D2211/001
Inventor 袁晓鸣王栋屈文胜岳祎楠吴鹏飞乔建军朱秀光
Owner BAOTOU IRON & STEEL GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products