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TiN enhanced ferrous matrix composite surface layer and processing method thereof

A technology of iron-based composite materials and processing methods, applied in metal processing equipment, manufacturing tools, arc welding equipment, etc., can solve problems such as poor wear resistance, achieve short nitriding treatment time, improve surface hardness and wear resistance , Excellent thermal conductivity

Inactive Publication Date: 2010-08-11
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention discloses a titanium nitride-reinforced iron-based composite material surface layer and a processing method thereof. A titanium nitride-reinforced surface layer is prepared on the surface of a steel part, which can further improve the performance of the iron-based composite material surface layer and solve the problem of steel resistance. The problem of poor grinding performance

Method used

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  • TiN enhanced ferrous matrix composite surface layer and processing method thereof
  • TiN enhanced ferrous matrix composite surface layer and processing method thereof
  • TiN enhanced ferrous matrix composite surface layer and processing method thereof

Examples

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Effect test

Embodiment 1

[0032] Q235 steel "TiN reinforced iron-based composite material surface layer"

[0033] 1) Use mechanical methods to remove the oxide film on the working part of the Q235 steel substrate, and then wipe off the oil with absorbent cotton dipped in acetone.

[0034] 2) Pre-coat a layer of pure titanium powder on the surface of the working part of the substrate. The particle size of the pure titanium powder is 300 mesh. Water glass solution is used as the adhesive, and the coating thickness is 0.5mm.

[0035]3) Place it in a drying oven after 24 hours, or heat it to 150°C for 2 hours with other heat sources. Argon arc cladding is carried out after cooling down to room temperature after power off.

[0036] 4) Fix the argon arc welding torch on the automatic walking mechanism, or manually hold the welding torch, the walking speed is about 2mm / s, the arc current is 140-160A, and the overlapping amount is controlled to be about 30%. Use 22MX-1 gas mixing proportioner to control N 2...

Embodiment 2

[0042] 20 steel "TiN reinforced iron-based composite material surface layer"

[0043] 1) Use mechanical methods to remove the oxide film on the working part of the 20 steel substrate, and then wipe the oil with absorbent cotton dipped in acetone.

[0044] 2) Pre-coat a layer of pure titanium powder on the surface of the working part of the substrate. The particle size of the pure titanium powder is 300 mesh. Water glass solution is used as the adhesive, and the coating thickness is 0.8mm.

[0045] 3) Place it in a drying oven after 24 hours, or heat it to 150°C for 2 hours with other heat sources. Argon arc cladding is carried out after cooling down to room temperature after power off.

[0046] 4) Fix the argon arc welding torch on the automatic walking mechanism, or manually hold the welding torch, the walking speed is about 4mm / s, the arc current is 200-220A, and the overlapping amount is controlled to be about 30%. Use 22MX-1 gas mixing proportioner to control N 2 The ra...

Embodiment 3

[0051] 45 steel "TiN reinforced iron-based composite material surface layer"

[0052] 1) Use mechanical methods to remove the oxide film on the working part of the 45 steel substrate, and then wipe the oil with absorbent cotton dipped in acetone.

[0053] 2) Pre-coat a layer of pure titanium powder on the surface of the working part of the substrate. The particle size of the pure titanium powder is 200 mesh. Water glass solution is used as the adhesive, and the coating thickness is 1mm.

[0054] 3) Place it in a drying oven after 24 hours, or heat it to 150°C for 2 hours with other heat sources. Argon arc cladding is carried out after cooling down to room temperature after power off.

[0055] 4) Fix the argon arc welding torch on the automatic walking mechanism, or manually hold the welding torch, the walking speed is about 5mm / s, the arc current is 220-240A, and the overlapping amount is controlled to be about 30%. Use 22MX-1 gas mixing proportioner to control N 2 The rati...

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Abstract

The invention discloses a TiN enhanced ferrous matrix composite surface layer and a processing method thereof. The processing method is characterized by precoating a layer of pure titanium powder on the surface of a steel matrix, adopting nitrogen arc for direct heating after drying to locally smelt the pure titanium powder and the surface of the steel matrix, Ti in a weld pool and N from the arc atmosphere undergoing nitridation reaction (Ti+N->TiN) and the in-situ TiN serving as an enhanced phase to form the ferrous matrix composite with the steel matrix. By adopting the treatment methods of titanium powder precoating and nitrogen arc cladding, the TiN enhanced ferrous matrix composite surface layer with thickness of 1-2mm is prepared on the surface of the steel matrix. The TiN enhanced phase grows in situ, is metallurgically bonded with the steel matrix, dendritical and granular and uniformly distributed in the steel matrix and can obviously improve the surface hardness and the wear resistance of the steel matrix.

Description

Technical field: [0001] The invention discloses a surface layer of a titanium nitride reinforced iron-based composite material and a processing method thereof, belonging to the technical field of metal surface material preparation and surface processing. Background technique: [0002] Metal matrix composites (MMCS) have properties such as high specific strength, high specific modulus, wear resistance, and high temperature resistance, especially particle-reinforced metal matrix composites have the advantages of low cost, relatively simple preparation process, and convenient subsequent processing. more extensive. Particle-reinforced metal matrix composites mainly use Al, Cu, Ni, Ti, and Fe as matrix materials, and the commonly used reinforcing particles are carbides, oxides, borides, nitrides, sulfides or their multiphase systems. Particle reinforced iron-based surface composite materials mainly include WC, TiC and VC reinforced iron-based wear-resistant composite materials, ...

Claims

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Application Information

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IPC IPC(8): C23C24/10B23K9/04
Inventor 徐文晓任振安王亚男张宝昌
Owner CHANGCHUN UNIV OF TECH
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