Medium alloy abrasion resistant steel and use thereof

A wear-resistant steel and alloy technology, applied in the field of wear-resistant steel and medium-alloy wear-resistant steel, can solve the problem of insufficient hardenability, and achieve the effects of good hardenability, good wear resistance and high degree of work hardening

Inactive Publication Date: 2009-08-05
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the hardness, impact toughness and wear resistance of steel need to be improved, and the hardenability of steel parts is somewhat insufficient due to the air quenching process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The medium-alloy wear-resistant steel of this embodiment contains the following chemical components in mass ratio: 0.31% carbon, 1.6% silicon, 0.52% manganese, 5.0% chromium, 0.5% molybdenum, 0.01% boron, 0.01% rare earth elements, and 0.1% aluminum , phosphorus 0.035%, sulfur 0.04%, and the balance is iron. After inoculation and modification, the cast parts after casting are heated to 1020°C for 2 hours, air quenched and cooled, and then heated to 280°C for 2 hours of tempering. The hardness of the prepared medium-alloy wear-resistant steel is 48-49HRC, and the V-notch impact toughness is 28-31J / cm 2 .

[0021] With medium alloy wear-resistant steel that does not contain boron and rare earth elements (prepared and processed according to the method of this embodiment, only does not contain boron and rare earth elements, and other chemical components are the same, its hardness is 47HRC, and the V-notch impact toughness is 23J / cm 2 ) compared with that of the medium-a...

Embodiment 2

[0023] The medium-alloy wear-resistant steel of this embodiment contains the following chemical components in mass ratio: 0.45% carbon, 2.0% silicon, 0.65% manganese, 3.0% chromium, 1.0% molybdenum, 0.2% zirconium, 0.001% boron, and 0.3% rare earth elements , phosphorus 0.028%, sulfur 0.027%, and the balance is iron. After inoculation and modification, the cast parts after casting are heated to 940°C for 3 hours, air quenched and cooled, and then heated to 280°C for 2 hours of tempering. The hardness of the prepared medium-alloy wear-resistant steel is 51-52HRC, and the unnotched impact toughness is 40-43J / cm 2 .

[0024] With medium-alloy wear-resistant steel that does not contain boron and rare earth elements (prepared and processed according to the method of this embodiment, only does not contain boron and rare earth elements, and has the same chemical composition, its hardness is 50HRC, and its unnotched impact toughness is 30J / cm 2 ) compared with that of the medium-a...

Embodiment 3

[0026] The medium-alloy wear-resistant steel of this embodiment contains the following chemical components in mass ratio: 0.25% carbon, 0.55% silicon, 0.3% manganese, 6.0% chromium, 0.2% molybdenum, 1.0% nickel, 0.1% tungsten, 0.08% niobium, Boron 0.007%, rare earth elements 0.15%, vanadium 0.2%, titanium 0.01%, phosphorus 0.04%, sulfur 0.029%, and the balance is iron. After inoculation and modification, the cast parts after casting are heated to 1000°C for 2 hours, oil quenched and cooled, and then heated to 280°C for 3 hours of tempering. The hardness of the prepared medium-alloy wear-resistant steel is 46-47HRC, and the V-notch impact toughness is 30-33J / cm 2 .

[0027] With medium alloy wear-resistant steel not containing niobium, boron and rare earth elements (prepared and processed according to the method of this example, only containing niobium, boron and rare earth elements, other chemical components are the same, its hardness is 45HRC, V-notch impact toughness The d...

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PUM

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Abstract

The invention discloses medium alloy abrasion-resistant steel with high hardness, good impact ductility, high work hardening capacity, favorable comprehensive mechanical property and hardenability. In the invention, as boron element and rear-earth elements are added, the medium alloy abrasion-resistant steel can be ensured to have better hardenability, better ductility, high initial hardness, high work hardening capacity and better abrasion-resistant performance, thereby enlarging the application of materials. The invention is suitable for preparing wearing parts, in particular to parts used for impacting wearing working conditions.

Description

technical field [0001] The invention relates to a wear-resistant steel, in particular to a medium-alloy wear-resistant steel with high hardness, good impact toughness, high degree of work hardening, good comprehensive mechanical properties and hardenability and its application, which belongs to the metal wear-resistant material technology field. Background technique [0002] At present, medium-alloy wear-resistant steel is commonly used under the impact load and wear conditions of metallurgy, electric power, building materials, construction, coal, chemical and other industries. [0003] Medium-alloy wear-resistant steel can obtain a martensitic matrix-based microstructure by cooling and quenching in air or oil or slow-cooling aqueous solution. This steel has certain hardness, impact toughness and wear resistance, especially the steel quenched in air has less stress and is not easy to break during use. [0004] The representative of medium-alloy wear-resistant steel is cast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/32C22C38/34C22C38/54
Inventor 李卫刘英
Owner JINAN UNIVERSITY
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