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A multi-component low-alloy wear-resistant cast steel containing nanocrystalline austenite and its preparation method

A multi-alloy and low-alloy technology, applied in the field of wear-resistant materials, can solve the problems of poor toughness and low plasticity, and achieve the effects of increased hardness, good wear resistance and low production cost

Inactive Publication Date: 2020-12-01
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing multi-component low-alloy wear-resistant cast steel containing nanocrystalline austenite, which solves the problem of low plasticity and poor toughness of existing low-alloy wear-resistant cast steel mainly based on martensite matrix The problem

Method used

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  • A multi-component low-alloy wear-resistant cast steel containing nanocrystalline austenite and its preparation method
  • A multi-component low-alloy wear-resistant cast steel containing nanocrystalline austenite and its preparation method
  • A multi-component low-alloy wear-resistant cast steel containing nanocrystalline austenite and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] A method for preparing a multi-element low-alloy wear-resistant cast steel containing nanocrystalline austenite is smelted in a 500-kg medium-frequency induction furnace. The specific process steps are:

[0040] ①Using scrap steel, ferrosilicon, ferromanganese and ferrochrome as raw materials, first melt medium-carbon and low-alloy wear-resistant cast steel in an electric furnace, and control the chemical composition and mass fraction of molten steel in the furnace to 0.28%C, 0.71%Mn , 1.55% Si, 1.28% Cr, 0.030% P, 0.021% S, the balance Fe, the sum of the mass fractions of the above chemical compositions is 100%, then the molten steel in the furnace is heated to 1658 ° C, and the molten steel is taken out of the furnace to the ladle, ladle Multi-element alloy particles with a particle size of 3.5-6.3mm are added in advance, the amount of multi-element alloy particles accounts for 3.1% of the mass fraction of molten steel entering the ladle, and the chemical composition a...

Embodiment 2

[0043] A method for preparing a multi-element low-alloy wear-resistant cast steel containing nanocrystalline austenite is smelted in a 1500-kg medium-frequency induction furnace, and the specific process steps are:

[0044] ①Using steel scrap, ferrosilicon, ferromanganese and ferrochrome as raw materials, first smelt medium-carbon and low-alloy wear-resistant cast steel in an electric furnace, and control the chemical composition and mass fraction of molten steel in the furnace to 0.37%C, 0.54%Mn , 1.74% Si, 1.04% Cr, 0.025% P, 0.020% S, the balance Fe, the sum of the mass fractions of the above chemical compositions is 100%, then the molten steel in the furnace is heated to 1674 ° C, and the molten steel is taken out of the furnace to the ladle, ladle Multi-element alloy particles with a particle size of 3.5-6.3mm are added in advance, the amount of multi-element alloy particles accounts for 3.4% of the mass fraction of molten steel entering the ladle, and the chemical composi...

Embodiment 3

[0047] A multi-component low-alloy wear-resistant cast steel containing nanocrystalline austenite and a preparation method thereof are smelted in a 1000-kg medium-frequency induction furnace, and the specific process steps are:

[0048] ①Using scrap steel, ferrosilicon, ferromanganese and ferrochrome as raw materials, first melt medium-carbon and low-alloy wear-resistant cast steel in an electric furnace, and control the chemical composition and mass fraction of molten steel in the furnace to 0.33%C, 0.59%Mn , 1.63% Si, 1.19% Cr, 0.029% P, 0.025% S, the balance Fe, the sum of the mass fractions of the above chemical compositions is 100%, then the molten steel in the furnace is heated to 1666°C, and the molten steel is taken out of the furnace to the ladle, ladle Multi-element alloy particles with a particle size of 3.5-6.3 mm are added in advance, the amount of multi-element alloy particles accounts for 3.2% of the mass fraction of molten steel entering the ladle, and the chemi...

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Abstract

The invention discloses a preparation method of multi-element low-alloy abrasion-resistant cast steel containing nanocrystalline austenite. Scrap steel, ferrosilicon, ferromanganese and ferrochrome are used as raw materials to smelt medium-carbon low-alloy steel, multi-element microalloy composite treatment is carried out in the smelting process, and multi-element low-alloy abrasion-resistant caststeel is obtained by pouring; and then, the multi-element low-alloy abrasion-resistant cast steel is subjected to variable temperature quenching treatment at ultra high temperature, high temperatureand medium high temperature to obtain the multi-element low-alloy abrasion-resistant cast steel containing the nanocrystalline austenite. The multi-element low-alloy abrasion-resistant cast steel is subjected to multi-element microalloy composite treatment, and a solidified structure is obviously refined; after further variable temperature quenching treatment at ultra high temperature, high temperature and medium high temperature, a martensite ghanaian crystal austenite multiphase structure is obtained; and the multi-element low-alloy abrasion-resistant cast steel has the characteristics of high hardness, good abrasion resistance, good strength and toughness and the like, has good use effect, and has good economic 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 multi-component low-alloy wear-resistant cast steel containing nanocrystalline austenite, and also relates to a preparation method of the above-mentioned multi-component low-alloy wear-resistant cast steel containing nano-crystalline austenite. Background technique [0002] Low-alloy wear-resistant cast steel has the advantages of simple production process and low production cost, and has broad application prospects in the field of wear-resistant materials. [0003] In order to improve the comprehensive performance of low-alloy wear-resistant cast steel, the Chinese invention patent "A method for preparing low-alloy high-toughness wear-resistant cast steel by electric arc furnace" (application number CN201410241277.3, publication number CN103981449A, publication date 2014.08.13) Disclosed is a method for preparing low-alloy high-toughness wear-resistant cast stee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/06C22C38/02C22C38/04C22C38/06C22C38/24C22C38/26C22C38/28C21C7/00
CPCC21C7/0006C22C33/06C22C38/001C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/24C22C38/26C22C38/28Y02P10/20
Inventor 符寒光成小乐屈银虎胥光申刘毅刘少飞徐洁
Owner XI'AN POLYTECHNIC UNIVERSITY