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

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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

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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Example Embodiment

[0031] Example 1:

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

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

[0034] 2) A layer of pure titanium powder is pre-applied on the surface of the working part of the substrate, the particle size of the pure titanium powder is 300 mesh, the water glass solution is used as the adhesive, and the coating thickness is 0.5 mm.

[0035] 3) Put it in a drying box after being placed for 24 hours, or use other heat sources to heat to 150°C for 2 hours. After cooling to room temperature, argon arc cladding is performed.

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

Example Embodiment

[0041] Example 2:

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

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

[0044] 2) A layer of pure titanium powder is pre-applied on the surface of the working part of the substrate, the particle size of the pure titanium powder is 300 mesh, the water glass solution is used as the adhesive, and the coating thickness is 0.8 mm.

[0045] 3) Put it in a drying box after being placed for 24 hours, or use other heat sources to heat to 150°C for 2 hours. After cooling to room temperature, argon arc cladding is performed.

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

Example Embodiment

[0050] Example 3:

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

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

[0053] 2) A layer of pure titanium powder is pre-coated on the surface of the working part of the substrate, the particle size of the pure titanium powder is 200 meshes, the water glass solution is used as the adhesive, and the coating thickness is 1 mm.

[0054] 3) Put it in a drying box after being placed for 24 hours, or use other heat sources to heat to 150°C for 2 hours. After cooling to room temperature, argon arc cladding is performed.

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

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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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