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Block iron boron compound material and preparation method thereof

A compound, iron-boron technology, applied in the field of bulk iron-boron compound materials and its preparation, can solve problems such as cumbersome process

Inactive Publication Date: 2016-12-07
HUNAN UNIV OF HUMANITIES SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, Fe 2 B compound bulk material has many reports in the field of wear-resistant and molten zinc corrosion-resistant alloys. For example, Chinese patent CN102328935A discloses a block Fe 2 The preparation method of compound B, but the process is cumbersome, especially the need to vacuumize the ball mill tank and fill it with argon for protection.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] FeB powder and iron powder are used to prepare a mixture of Fe-8.8wt%B;

[0018] Take by weighing the graphite powder of above-mentioned mixture weight fraction 1.8% and join in above-mentioned mixture;

[0019] The zinc stearate that takes above-mentioned mixture weight fraction 0.5% joins in above-mentioned mixture;

[0020] Put the mixture of graphite powder and molding agent into a ball mill for dry mixing. The rotating speed of the ball mill is 350 r / min, and the ball milling time is 10h;

[0021] Put the ball-milled mixture into a mold for mechanical molding into a billet;

[0022] Put the pressed billet into the vacuum sintering furnace for vacuum sintering, the vacuum degree is higher than 1×10 -1 MPa, hold at 1050°C for 45min, final sintering temperature at 1120°C, hold for 60min.

[0023] Finally, the single-phase Fe 2 B bulk iron boron compound material.

Embodiment 2

[0025] FeB powder and iron powder are used to prepare a mixture of Fe-9.5wt%B;

[0026] The graphite powder that takes above-mentioned mixture weight fraction 0.1% joins in above-mentioned mixture;

[0027] The zinc stearate that takes above-mentioned mixture weight fraction 1.6% joins in above-mentioned mixture;

[0028] Put the mixture of graphite powder and molding agent into a ball mill for dry mixing. The rotating speed of the ball mill is 220 r / min, and the ball milling time is 7 hours;

[0029] Put the ball-milled mixture into a mold for mechanical molding into a billet;

[0030] Put the pressed billet into the vacuum sintering furnace for vacuum sintering, the vacuum degree is higher than 1×10 -1 MPa, hold at 1030°C for 30 minutes, final sintering temperature at 1200°C, and hold for 10 minutes.

[0031] Finally, the single-phase Fe 2 B bulk iron boron compound material.

Embodiment 3

[0033] FeB powder and iron powder are used to prepare a mixture of Fe-12.5wt%B;

[0034] The graphite powder that takes above-mentioned mixture weight fraction 1.0% joins in above-mentioned mixture;

[0035] The zinc stearate that takes above-mentioned mixture weight fraction 1.2% joins in above-mentioned mixture;

[0036] Put the mixture of graphite powder and molding agent into a ball mill for dry mixing. The rotating speed of the ball mill is 290 r / min, and the ball milling time is 20h;

[0037] Put the ball-milled mixture into a mold for mechanical molding into a billet;

[0038] Put the pressed billet into the vacuum sintering furnace for vacuum sintering, the vacuum degree is higher than 1×10 -1 MPa, hold at 1075°C for 60 minutes, final sintering temperature at 1290°C, hold for 30 minutes.

[0039] Finally Fe 2 A bulk iron-boron compound material composed of B and FeB.

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Abstract

The invention discloses a block iron boron compound material and a preparation method thereof. Each element of the block iron boron compound material comprises the following chemical components in percentage by weight: 8.8 to 12.5 percent of B and the balance of Fe and unavoidable impurity elements. A preparation process comprises six steps of batching, adding graphite powder, adding a forming agent, mixing materials, forming and performing vacuum sintering; the finally prepared material is single-phase Fe2B or a material which consists of Fe2B and FeB. According to the block iron boron compound material and the preparation method thereof, oxygen in raw materials is removed by adding the graphite powder and excessive B; a process flow is simplified; the material with excellent performance is prepared; the block iron boron compound material is mainly used for manufacturing an abrasion resistant and corrosion resistant part and a corresponding coating.

Description

technical field [0001] The invention relates to a bulk iron-boron compound material and a preparation method thereof, in particular to a single-phase Fe 2 B or by Fe 2 The material composed of B and FeB and its preparation method, the material is suitable for mining, metallurgy, coal, machinery and electric power industries, suitable for the preparation of tool molds, wear-resistant and corrosion-resistant parts and corresponding coatings, and electrodes for electric spark deposition materials etc. Background technique [0002] Transition metal borides have high hardness, high melting point, excellent electrical conductivity, thermal conductivity and corrosion resistance, so that cermets based on it have great development potential in the fields of wear-resistant, corrosion-resistant and high-temperature resistant materials and Broad application prospects, which also makes boride-based cermets become the most promising cermets. [0003] Fe 2 The hardness of phase B is 13...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B35/622C04B35/65
CPCC04B35/5805C04B35/622C04B35/65C04B2235/425C04B2235/656C04B2235/6581
Inventor 陈志国魏祥钟掘
Owner HUNAN UNIV OF HUMANITIES SCI & TECH
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