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Carbide-free bainitic steel, toothed plate adopting steel and preparation method thereof

A technology of bainite steel and carbide, which is applied in the direction of manufacturing tools, casting molding equipment, metal processing equipment, etc., can solve the problems of easy deformation, fracture and wear of tooth plates, improve wear resistance and service life, and reduce costs Effect

Inactive Publication Date: 2013-11-20
MIANYANG JINDING ELECTROMECHANICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that the tooth plate of the toothed roller crusher is easily deformed, broken and worn in the prior art, and to provide a carbide-free bainite steel and its application in the toothed roller crusher tooth plate , the carbide-free bainite steel has the characteristics of high strength, high toughness, wear resistance, and weldability, which greatly improves the wear resistance and service life of the gear plate of the toothed roller crusher

Method used

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  • Carbide-free bainitic steel, toothed plate adopting steel and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The chemical composition and weight percentage of carbide bainitic steel are: C 0.3%, Si 1.0%, Mn 1.5%, Cr 0.8%, Mo 0.1%, Ni 0.8%, B 0.004%, Ti 0.2%, P≤0.015% , and S≤0.015%, the balance being Fe and accompanying impurities.

[0021] The above-mentioned carbide bainite steel (ZG35Si2Mn2Ni2CrMoBTi) is used as the material, and the gear plate of the toothed roller crusher is prepared by the lost foam casting process and the heat treatment process; the specific process is: the lost foam process is used for casting, and the EPS foam is used to prepare the toothed roller crusher. The machine tooth plate model is coated with refractory paint and dried, then boxed, and then the shell is fired under negative pressure to form; then a 0.75-ton intermediate frequency induction furnace is used to prepare carbide-free bainite steel. The specific process is: melting scrap steel into Liquid steel, the chemical composition is detected before the furnace, and then the molten steel compo...

Embodiment 2

[0025] The chemical composition and weight percentage of carbide bainitic steel are: C 0.4%, Si 2.0%, Mn 2.5%, Cr 1.4%, Mo 0.6%, Ni 1.6%, B 0.008%, Ti 0.5%, P≤0.015% , and S≤0.015%, the balance being Fe and accompanying impurities.

[0026] Using the above-mentioned carbide bainitic steel as the material, the gear plate of the toothed roller crusher is prepared through the lost foam casting process and the heat treatment process; the specific process is as follows:

[0027] (1) Lost foam casting process: the gear plate model of the toothed roller crusher is prepared by using EPS foam, coated with refractory paint and dried, then packed, and then fired into the shell under negative pressure;

[0028] (2) Carbide-free bainite steel is prepared by using an intermediate frequency induction furnace. The specific process is: melting the scrap steel into molten steel, testing the chemical composition before the furnace, and then adjusting the composition of the molten steel to its ch...

Embodiment 3

[0035]The chemical composition and weight percentage of carbide bainitic steel are: C 0.35%, Si 1.5%, Mn 2.0%, Cr 1.2%, Mo 0.4%, Ni1.2%, B 0.006%, Ti 0.3%, P≤0.015 %, and S≤0.015%, the balance is Fe and accompanying impurities.

[0036] The above-mentioned carbide bainite steel (ZG35Si2Mn2Ni2CrMoBTi) is used as the material, and the gear plate of the toothed roller crusher is prepared by the lost foam casting process and the heat treatment process; the specific process is: the lost foam process is used for casting, and the EPS foam is used to prepare the toothed roller crusher. The machine tooth plate model is coated with refractory paint and dried, then boxed, and then the shell is fired under negative pressure to form; then a 0.75-ton intermediate frequency induction furnace is used to prepare carbide-free bainite steel. The specific process is: melting scrap steel into Liquid steel, the chemical composition is detected before the furnace, and then the composition of the mol...

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Abstract

The invention discloses carbide-free bainitic steel and a rod-toothed crusher toothed plate prepared from the carbide-free bainitic steel. The bainitic steel comprises the following chemical components in percentage by weight: 0.3 to 0.4 percent of C, 1.0 to 2.0 percent of Si, 1.5 to 2.5 percent of Mn, 0.8 to 1.4 percent of Cr, 0.1 to 0.6 percent of Mo, 0.8 to 1.6 percent of Ni, 0.004 to 0.008 percent of B, 0.2 to 0.5 percent of Ti, less than or equal to 0.015 percent of P, less than or equal to 0.015 percent of S, and the balance of Fe and accompanying impurities. The carbide-free bainitic steel is prepared into the rod-toothed crusher toothed plate through a specific processing technology; the toothed plate has good strong-toughness coordination, which reaches the working performance index of the rod-toothed crusher toothed plate; and the abrasion resistance of the rod-toothed crusher toothed plate is greatly improved, the service life of the rod-toothed crusher toothed plate is greatly prolonged, and the cost is reduced.

Description

technical field [0001] The invention relates to a carbide-free bainite steel, a toothed roller crusher tooth plate prepared by using the carbide-free bainite steel as a material, and a preparation method of the toothed roller crusher tooth plate. Background technique [0002] Typical bainite is a non-lamellar structure composed of bainitic ferrite and carbides; carbide-free bainite is a new type of bainite structure composed of bainitic ferrite (BF) and The composition of retained austenite (AR) is the product of the initial stage of bainite transformation, and there is no carbide in the structure; compared with the typical bainite structure, the retained austenite in the structure replaces the carbide in the typical bainite It greatly improves the impact performance of the material; the material has the characteristics of high strength, high toughness, wear resistance and weldability. [0003] The toothed roller crusher has the characteristics of compact structure, flexibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58B22C9/04C21D1/18
Inventor 刘志学冯异
Owner MIANYANG JINDING ELECTROMECHANICAL TECH
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