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A kind of wear-resistant alloy layer based on high boron iron base and method for preparing composite wear-resistant parts

A technology of composite wear-resistant parts and wear-resistant alloys, used in metal processing equipment, coatings, manufacturing tools, etc., can solve the problems of low toughness, constraints, poor plasticity of Fe-B alloys, and achieve low brittleness, surface hardness and The effect of improved service life and strong wear resistance

Active Publication Date: 2019-12-24
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existence of boride network structure leads to poor plasticity of Fe-B alloy, which becomes the key to restrict the engineering application of this alloy.
Many scholars use high-temperature heat treatment, rare earth modification, alloying and other means, although they have some effect on improving the strength and toughness of Fe-B alloys, but they have not fundamentally solved the problem of low toughness.

Method used

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  • A kind of wear-resistant alloy layer based on high boron iron base and method for preparing composite wear-resistant parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1) Mix the alloy powder with a particle size of 10-50 microns and the inorganic salt evenly at a mass ratio of 1:2.5, and apply it to the part of the casting that needs to be strengthened;

[0041] 2) preheating the coated casting in an oven, so that the alloy powder particles are connected to each other to form a pore-like prefabricated body;

[0042] 3) The metal liquid of high boron iron-based alloy material is poured by casting infiltration process. The pouring temperature is 1450°C. After cooling, it undergoes quenching and stress relief treatment. The quenching temperature is 1050°C, and the stress relief annealing temperature is 200°C to obtain high boron iron-based Crane drum.

Embodiment 2

[0044] 1) Mix the alloy powder with a particle size of 10-50 microns and the inorganic salt evenly at a mass ratio of 1:2.5, and apply it to the part of the casting that needs to be strengthened;

[0045] 2) Preheating the coated casting in an oven, so that the alloy powder particles are connected to each other to form a pore-like prefabricated body;

[0046] 3) The metal liquid of high boron iron-based alloy material is poured by cast infiltration process, the pouring temperature is 1550°C, after cooling, it is quenched and stress-relieved, the quenching temperature is 1180°C, and the stress-relief annealing temperature is 300°C to obtain high-boron iron-based alloy material Hoist the reducer reel.

Embodiment 3

[0048] 1) Mix the alloy powder with a particle size of 10-50 microns and the inorganic salt evenly at a mass ratio of 1:2, and apply it to the part of the casting that needs to be strengthened;

[0049] 2) Preheating the coated casting in an oven, so that the alloy powder particles are connected to each other to form a pore-like prefabricated body;

[0050] 3) The metal liquid of high boron iron-based alloy material is poured by casting infiltration process. The pouring temperature is 1450°C. After cooling, it undergoes quenching and stress relief treatment. The quenching temperature is 1050°C, and the stress relief annealing temperature is 200°C. After cooling, high boron is obtained. Iron-based cone-type grinding roller composite material.

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Abstract

The invention discloses an anti-wear alloy layer based on a high boron iron base and a method for preparing a composite anti-wear part. The anti-wear alloy layer is a high boron iron-based alloy, andcomprises, by mass, 0.2%-0.3% of C, 1.20%-1.60% of B, 0.4%-0.9% of Si, 0.6%-1.1% of Mn, 8.3%-10.5% of Ni, 17.0%-20.0% of Cr, 0.08%-0.15% of Ce, 0.10%-0.15% of Ti, 0.04%-0.08% of N, less than 0.05% ofP, less than 0.05% of S, and the balance Fe and other unavoidable impurities. By adopting an advanced resin sand production line and an electric-furnace smelting technology, surface alloying is achieved through a cast infiltration technology to replace heat treatment surface strengthening, the elements of titanium, zirconium, tantalum and tungsten are evenly mixed with inorganic salt to be fixed in a casting mold, metal liquid is casted, and the composite anti-wear part is obtained after cooling and unpacking. The anti-wear alloy layer based on the high boron iron base and the method for preparing the composite anti-wear part can improve the toughness and the surface hardness of the high boron iron-based alloy anti-wear part, and can prolong the service life of the high boron iron-based alloy anti-wear part.

Description

technical field [0001] The invention belongs to the field of preparation of wear-resistant materials, and in particular relates to a high-boron iron-based wear-resistant alloy layer and a method for preparing composite wear-resistant parts. Background technique [0002] As a new wear-resistant material, Fe-B alloy has the advantages of low cost, high hardness and high wear resistance. However, the existence of boride network structure leads to poor plasticity of Fe-B alloy, which becomes the key to restrict the engineering application of this alloy. Many scholars have adopted high-temperature heat treatment, rare earth modification, alloying and other means. Although they have some effects on improving the strength and toughness of Fe-B alloys, they have not fundamentally solved the problem of low toughness. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high-boron-iron-based wear-resistant alloy layer and a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/54C22C38/50C22C38/02C22C38/04B22C3/00B22D27/18
CPCB22C3/00B22D27/18C22C38/001C22C38/005C22C38/02C22C38/04C22C38/50C22C38/54
Inventor 李烨飞陈志刘宪民刘庆坤高义民袁鹤鹤刘志伟郑巧玲
Owner XI AN JIAOTONG UNIV
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