Preparation method for Si-Mn alloyed wear-resistant cast steel

A technology for alloying and casting steel, applied in the field of wear-resistant materials, can solve the problems of high production cost, insufficient wear resistance, and wear-resistant cast steel contains precious alloying elements, etc. Excellent abrasive effect

Inactive Publication Date: 2017-03-22
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing Si-Mn alloyed wear-resistant cast steel, which solves the problems that the wear-resistant cast steel prepared by the existing method contains precious alloy elements, high production cost, and insufficient wear resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The Si-Mn alloyed wear-resistant cast steel is prepared by melting in a 500 kg intermediate frequency induction furnace. The specific preparation process steps are as follows:

[0044] Step 1, take raw material according to mass percentage: 61% silicon steel sheet waste material (chemical composition and mass fraction % of silicon steel sheet waste material are: 3.47Si, 0.33Al, 0.05C, 0.0017S, 0.11Mn, 0.013P, surplus is Fe and its unavoidable impurity elements, the sum of each element is 100%), 25% high manganese steel scrap (the chemical composition and mass fraction % of high manganese steel scrap are: 0.96C, 11.53Mn, 0.49Si, 0.021S , 0.050P, the balance is Fe and its unavoidable impurity elements, the sum of each element is 100%), 2.8% carbon ferrochrome (the chemical composition mass fraction of carbon ferrochromium is: 62.55Cr, 7.94C , 1.89Si, 0.026S, 0.039P, the balance is Fe and its unavoidable impurity elements, the sum of each element is 100%), 11.1% of Q235 st...

Embodiment 2

[0049] The Si-Mn alloyed wear-resistant cast steel is prepared by melting in a 1000 kg intermediate frequency induction furnace. The specific preparation process steps are as follows:

[0050] Step 1, take raw material according to mass percentage: 61% silicon steel sheet waste material (chemical composition and mass fraction % of silicon steel sheet waste material are: 2.97Si, 0.51Al, 0.057C, 0.0017S, 0.09Mn, 0.011P, surplus is Fe and its unavoidable impurity elements, the sum of each element is 100%), 23.88% high manganese steel scrap (the chemical composition and mass fraction % of high manganese steel scrap are: 1.24C, 13.74Mn, 0.69Si, 0.022S , 0.059P, the balance is Fe and its unavoidable impurity elements, the sum of each element is 100%), 2.5% carbon ferrochrome (the chemical composition mass fraction of carbon ferrochromium is: 67.67Cr, 8.35C , 2.09Si, 0.032S, 0.040P, the balance is Fe and its unavoidable impurity elements, the sum of each element is 100%), 12.5% ​​of ...

Embodiment 3

[0055] The Si-Mn alloyed wear-resistant cast steel is prepared by melting in a 500 kg intermediate frequency induction furnace. The specific preparation process steps are as follows:

[0056] Step 1, take raw material according to mass percentage: 63% silicon steel sheet waste material (chemical composition and mass fraction % of silicon steel sheet waste material are: 3.24Si, 0.51Al, 0.05C, 0.0013S, 0.13Mn, 0.012P, surplus is Fe and its unavoidable impurity elements, the sum of each element is 100%), 23.32% high manganese steel scrap (the chemical composition and mass fraction % of high manganese steel scrap are: 1.27C, 13.08Mn, 0.47Si, 0.026S , 0.065P, the balance is Fe and its unavoidable impurity elements, the sum of each element is 100%), 2.6% carbon ferrochromium (the chemical composition mass fraction of carbon ferrochromium is: 65.10Cr, 7.61C , 1.82Si, 0.037S, 0.034P, the balance is Fe and its unavoidable impurity elements, the sum of each element is 100%), 11% of Q235...

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Abstract

The invention provides a preparation method for Si-Mn alloyed wear-resistant cast steel. The preparation method comprises the steps of: firstly mixing, heating and melting Q235 steel scrap, carbon ferrochrome and a high manganese steel waste material; when the molten iron temperature reaches 1520-1550 DEG C, adding a silicon steel sheet waste material; after fully melting the materials, adding metallic aluminum to deoxidize; then performing external treatment on the molten iron and performing moulding by casting; and quenching and tempering a casting to obtain the Si-Mn alloyed wear-resistant cast steel. According to the preparation method provided by the invention, by taking cheap high manganese steel waste material and silicon steel sheet waste material as main raw materials and adding a proper amount of high carbon ferrochrome without expensive alloy elements such as molybdenum, nickel and copper, the production cost is greatly reduced; the obtained cast steel is excellent in mechanical property, the hardness reaches 55-57HRC, the hardness is uniformly distributed, the impact toughness reaches 138-148 J / cm<2>, and the tensile strength reaches 1650MPa above, and the cast steel reaches requirements of ultra-high strength wear-resistant steel and has good economical and social benefits in popularization and application.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant materials, and relates to a Si-Mn alloyed wear-resistant cast steel, and also relates to a preparation method of the Si-Mn alloyed wear-resistant cast steel. Background technique [0002] Wear-resistant cast steel is widely used in metallurgy, mining, machinery, electric power, agricultural machinery, petroleum, chemical industry, and even aerospace, national defense, military and other fields. Commonly used wear-resistant cast steel is high manganese steel and various alloy cast steel. Chinese invention patent "A Lightweight High Manganese Steel Liner for Crusher and Its Preparation Method" (application date 2015.09.18, publication number CN105154764A, publication date 2015.12.16) discloses a light high manganese steel for crusher Liner and its preparation method, the chemical composition of the liner is: 1.0% to 1.5% C, 0.3% to 0.5% Si, 18% to 26% Mn, 6% to 8% Al, 0.002% to 0.005% B, 0.0...

Claims

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Application Information

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IPC IPC(8): C22C33/06C21C7/00
CPCC21C7/0006C21C7/0056C22C33/06C21C2007/0062Y02P10/20
Inventor 符寒光成小乐屈银虎胥光申蒋志强刘毅刘少飞徐洁尹君
Owner XI'AN POLYTECHNIC UNIVERSITY
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