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Wear-resistant steel and preparation method thereof

A wear-resistant steel and molten steel technology, which is applied in the field of wear-resistant steel casting, can solve the problem that the hardness performance needs to be further improved, and achieve the effects of reducing metal consumption, simple processing technology and low content of precious alloys

Inactive Publication Date: 2018-06-29
HENAN UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The Chinese invention patent application publication number CN 101835917A discloses a high-strength thick steel plate and its manufacturing method. The steel plate disclosed in Example 14 is composed of the following components in mass percentage: C 0.201%, Si 0.24%, Mn1. 48%, P 0.003%, S 0.001%, Cu 1.12%, Ni 0.58%, Cr 0.41%, Mo 0.11%, Al 0.09, Nb 0.015%, B 0.0015%, N 0.0045%, the balance is iron and unavoidable The steel plate with the above composition disclosed in this patent has a yield strength of 1398MPa and a tensile strength of 1612MPa, but its hardness still needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The wear-resistant steel of this embodiment is composed of the following components by mass percentage: C 0.40%, Si 0.4%, Mn 2.0%, Cr 1.0%, Ni 0.3%, Mo 0.22%, Al 0.1%, Nb 0.01%, B 0.035%, Cu 0.01%, N 0.09%, S 0.005%, P 0.006%, and the balance is Fe.

[0058] The preparation method of the wear-resistant steel of the present embodiment comprises the following steps:

[0059] 1) Raw materials such as steel scrap, ferrosilicon, ferronickel, ferromolybdenum, ferrochrome nitride, ferromanganese nitride, ferroniobium, ferroboron, and pure copper are batched according to the composition content of the above-mentioned wear-resistant steel, and set aside; Good raw materials such as steel scrap, ferrosilicon, ferronickel, ferromolybdenum, ferroniobium, ferroboron, and pure copper are added to an intermediate frequency induction furnace, heated to 1200°C and kept for 25 minutes. Ferromanganese, aluminum nitride, heat preservation for 10 minutes, heating up to 1600 ° C for 10 minut...

Embodiment 2

[0063] The wear-resistant steel of this embodiment is composed of the following components in mass percentage: C 0.42%, Si 0.4%, Mn2.2%, Cr 1.2%, Ni 0.3%, Mo 0.22%, Al 0.1%, Nb 0.01%, B 0.035%, Cu 0.01%, N 0.08%, S 0.005%, P 0.006%, and the balance is Fe.

[0064] The preparation method of the wear-resistant steel of the present embodiment comprises the following steps:

[0065] 1) Raw materials such as steel scrap, ferrosilicon, ferronickel, ferromolybdenum, ferrochrome nitride, ferromanganese nitride, ferroniobium, ferroboron, and pure copper are batched according to the composition content of the above-mentioned wear-resistant steel, and set aside; Good raw materials such as steel scrap, ferrosilicon, ferronickel, ferromolybdenum, ferroniobium, ferroboron, and pure copper are added to an intermediate frequency induction furnace, heated to 1400°C and kept for 15 minutes. Ferromanganese, aluminum nitride, heat preservation for 25 minutes, heating up to 1650 ° C for 15 minute...

Embodiment 3

[0069] The wear-resistant steel of this embodiment consists of the following components by mass percentage: C 0.43%, Si 0.4%, Mn 2.4%, Cr 1.4%, Ni 0.3%, Mo 0.22%, Al 0.1%, Nb 0.01%, B 0.035%, Cu 0.01%, N 0.10%, S 0.005%, P 0.006%, and the balance is Fe.

[0070] The preparation method of the wear-resistant steel of the present embodiment comprises the following steps:

[0071] 1) Raw materials such as steel scrap, ferrosilicon, ferronickel, ferromolybdenum, ferrochrome nitride, ferromanganese nitride, ferroniobium, ferroboron, and pure copper are batched according to the composition content of the above-mentioned wear-resistant steel, and set aside; Good raw material scrap steel, ferrosilicon, ferronickel, ferromolybdenum, ferroniobium, ferroboron, and pure copper are added to the intermediate frequency induction furnace, heated to 1300°C and kept for 15 minutes. After the surface of the raw material starts to melt, add ferrochrome nitride, Ferromanganese, aluminum nitride, h...

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PUM

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Abstract

The invention relates to wear-resistant steel and a preparation method thereof and belongs to the technical field of wear-resistant steel casting. The wear-resistant steel is prepared from componentsin percentage by mass as follows: 0.40%-0.46% of C, 0.30%-0.50% of Si, 1.8%-2.4% of Mn, 0.9%-1.4% of Cr, 0.3%-0.5% of Ni, 0.2%-0.3% of Mo, 0.1%-0.2% of Al, 0.01%-0.02% of Nb, 0.03%-0.05% of B, 0.01%-0.03% of Cu, 0.07%-0.15% of N and the balance of Fe and inevitable impurities. The wear-resistant steel has low content of precious alloys of Ni, Mo and the like, is high in hardness and good in wear resistance and has low sensitivity to dynamic load of notches and internal defects, the hardness is as high as HRC51-57, and the Charpy V notch impact test Akv is 21-29 J / cm<2>.

Description

technical field [0001] The invention relates to a wear-resistant steel and a preparation method thereof, belonging to the technical field of wear-resistant steel casting. Background technique [0002] The main function of the mill is to refine and crush solid materials. It is currently widely used in construction, chemical industry, ceramics, medicine, electric power and national defense and other departments. The main function of the wear-resistant material is to protect the barrel of the mill and avoid the rapid failure of the barrel due to the direct impact and wear of the grinding body and the material. Therefore, the wear-resistant material must meet the mechanical properties of high impact toughness, high hardness and high wear resistance. performance requirements. [0003] Traditional wear-resistant materials are mainly high-manganese steel, and after water-toughening treatment, its structure at room temperature is mainly austenite. Under the action of large impact ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C38/48C22C38/42C22C38/54C22C38/58C22C38/02C22C33/04
CPCC22C38/44C22C33/04C22C38/02C22C38/42C22C38/48C22C38/54C22C38/58
Inventor 魏世忠王晓东张国赏司岸恒徐流杰张小军
Owner HENAN UNIV OF SCI & TECH