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Manufacturing method of Mo2FeB2 based steel bonded hard alloy

A technology of steel-bonded cemented carbide and mo2feb2 is applied in the field of preparation of Mo2FeB2-based steel-bonded cemented carbide, which can solve the problems of difficult control of microstructure change and unstable performance of cermet, and achieves easy control of structure, good wettability, The effect of high hardness

Inactive Publication Date: 2013-05-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the simultaneous sintering of Mo 2 FeB 2 Therefore, the degree of chemical reaction of raw materials is strongly sensitive to sintering temperature and reaction atmosphere, and the change of structure is difficult to control. The prepared Mo 2 FeB 2 Cermet performance is extremely unstable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Implementation Example 1: Composition: 70wt%Mo 2 FeB 2 _5wt%Cr_3.0wt% Ni_Fe balance, Mo 2 FeB 2 Preparation of base steel bonded carbide.

[0018] 1. Weigh 100g of BN powder, 100g of carbonyl iron powder, and 300g of Mo powder, totaling 500g. Put into rolling ball mill and dry mix for 4h. The ball-to-material ratio is 7:1. The rotational speed of the ball mill was 70rad / min.

[0019] 2. Put the mixed powder into a ceramic crucible, seal it, put it into a vacuum furnace, heat it to 1300°C and keep it for 30 minutes. The heating rate is 7°C / min. The furnace was then cooled to room temperature.

[0020] 3. Mo obtained after sintering 2 FeB 2 The powder is crushed to about 1um after being vibrated by a high-frequency vibration ball mill for 12 hours.

[0021] 4. According to the mass fraction of 70wt% Mo 2 FeB 2 _5wt%Cr_3.0wt%Ni_Fe surplus is prepared raw material powder and adds up to 500g. Rolling ball milling is used for wet mixing. The rotational speed of...

Embodiment 2

[0026] Implementation example 2: composition: mass fraction 30wt%Mo 2 FeB 2 _8wt%Cr_3.0wt% Ni_Fe balance, Mo 2 FeB 2 Preparation of base steel bonded carbide.

[0027] 1. Weigh 50g of BN powder, 50g of carbonyl iron powder, and 400g of Mo powder, totaling 500g. Put into rolling ball mill and dry mix for 4h. The ball-to-material ratio is 7:1. The rotational speed of the ball mill was 70rad / min.

[0028] 2. Put the mixed powder into a ceramic crucible, seal it, put it into a vacuum furnace, heat it to 1400°C and keep it for 10 minutes. The heating rate is 7°C / min. The furnace was then cooled to room temperature.

[0029] 3. Mo obtained after sintering 2 FeB 2 The powder is crushed to about 1um after being vibrated by a high-frequency vibration ball mill for 12 hours.

[0030] 4. According to the mass fraction of 30wt% Mo 2 FeB 2 _8wt%Cr_3.0wt%Ni_Fe surplus is mixed with raw material powder and adds up to 500g. Rolling ball milling is used for wet mixing. The rotat...

Embodiment 3

[0035] Implementation example 3: composition: mass fraction 70wt%Mo 2 FeB 2 _3Cr_2.0% V_3%W_Fe balance, Mo 2FeB 2 Preparation of base steel bonded carbide.

[0036] 1. Weigh 60g of BN powder, 70g of carbonyl iron powder, and 370g of Mo powder, totaling 500g. Put into rolling ball mill and dry mix for 4h. The ball-to-material ratio is 7:1. The rotational speed of the ball mill was 70rad / min.

[0037] 2. Put the mixed powder into a ceramic crucible, seal it, put it into a vacuum furnace, heat it to 1400°C and keep it for 0min. The heating rate is 7°C / min. The furnace was then cooled to room temperature.

[0038] 3. Mo obtained after sintering 2 FeB 2 The powder is crushed to about 1um after being vibrated by a high-frequency vibration ball mill for 12 hours.

[0039] 4. According to 70wt% Mo 2 FeB 2 _3wt%Cr_2.0wt%V_3wt%W_Fe surplus is prepared raw material powder and adds up to 500g. Rolling ball milling is used for wet mixing. The rotational speed of the ball mil...

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Abstract

The invention relates to a manufacturing method of a Mo2FeB2 based steel bonded hard alloy and belongs to the field of structural function material manufacturing. According to the manufacturing method, firstly, BN, carbonyl iron and Mo are used as reaction materials for manufacturing Mo2FeB2 ternary composite boride powder with high purity, and then the Mo2FeB2 based steel bonded hard alloy is manufactured by using the manufactured Mo2FeB2 as a hard phase and iron-based alloy powder as a bonding phase. The manufacturing method has the advantages: (1) the manufactured Mo2FeB2 ternary compound boride powder has high purity without impurity phases and is easy to break or does not need to break; (2) the Mo2FeB2 has high hardness and electric conductivity, good abrasive resistance, corrosion resistance and high temperature resistance as well as good wettability on a steel matrix, and the Mo2FeB2 based steel bonded hard alloy has easily controlled structure, excellent mechanical performanceand stable performance; and (3) the steel bonded hard alloy has low sintering temperature and energy consumption and is suitable for industrialization requirement.

Description

technical field [0001] The present invention relates to a Mo 2 FeB 2 The preparation technology of steel-based cemented carbide belongs to the field of preparation of structural functional materials, and is used to prepare high-performance Mo 2 FeB 2 The base steel-bonded hard alloy provides a new technology with stable product performance, low cost, controllable process and industrialization. technical background [0002] Commonly used hard phase materials in cemented carbide include: carbides, oxides, nitrides and borides. Among them, borides have high melting point, high hardness, high wear resistance and high corrosion resistance, and are regarded as more promising hard phase materials. Mo 2 FeB 2 With good wear resistance, corrosion resistance and high temperature resistance, as well as high electrical conductivity, it has been widely used and developed in the fields of wear resistance and corrosion resistance. [0003] Compared with TiC, Mo 2 FeB 2 Has better ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C29/14C22C38/00C22C33/02
Inventor 郭志猛曾鲜石永亮刘翔庆方哲成屈彦杰
Owner UNIV OF SCI & TECH BEIJING
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