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Laser induced metal surface layer composite TiN reinforcing method with TiO2 and N2 gas as components

A laser-induced, metal surface technology, applied in the coating process of metal materials, coatings, etc., can solve the problems of limited types, easy peeling of coatings, poor plating performance, etc., and achieve the effect of good hardness and wear resistance

Active Publication Date: 2013-03-20
路亚科消防车辆制造有限公司
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AI Technical Summary

Problems solved by technology

The PVD method has a lower formation temperature, thinner coating, low bonding strength with the substrate, easy peeling of the coating from the substrate, and poor wrapping properties
The deposition temperature of the CVD method is high, but it exceeds the heat treatment temperature of most commonly used tool materials, so the types of tool materials that can be used for coating are extremely limited; equipment, complex process and high cost, which conflicts with the green industry currently advocated
[0004] Regardless of PVD method or CVD method, the TiN coating obtained is relatively thin, with a thickness of only a few microns (μm), and the coating is mechanically bonded to the substrate, and the strength of the bonding surface is low, and the coating is prone to peeling off during use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] 1. Surface strengthening treatment for Q235A, 20 steel, 40 steel, 45 steel, 20G, 20Mn, 40Mn and 60Mn carbon structural steel:

[0017] 1. Apply industrial pure TiO on the surface of carbon structural steel 2 Powder, 1.5 mm thick;

[0018] 2. With the movement of the laser spot, nitrogen gas is passed through, and the flow rate of nitrogen gas is 10L / min;

[0019] 3. The laser beam scans at a speed of 500mm / min, the laser power is 900W, the laser wavelength is 1.06μm, and the spot diameter is 2mm.

[0020] 4. Detection:

[0021] The TiN layer with a thickness of up to 500 microns is formed in situ on the surface of carbon structural steel, and the microhardness can reach HV1700.

[0022] 2. Surface strengthening treatment for 20MnV, 40Cr, 35CrMoV and 20CrMnSi alloy structural steels:

[0023] 1. Coating industrial pure TiO on the surface of alloy structural steel 2 Powder, 1.5 mm thick;

[0024] 2. With the movement of the laser spot, nitrogen gas is passed thr...

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PUM

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Abstract

The invention discloses a laser induced metal surface layer composite TiN reinforcing method with TiO2 and N2 gas as components, and relates to the technical field of metal surface reinforcement process. The method comprises the following steps: applying TiO2 powder on a metal surface, and in N2 gas atmosphere, scanning with laser beams on the metal surface to which the TiO2 powder is applied. By adopting the above method, TiCN can be generated on the metal surface layer in an in-situ composite manner, thus enhancing the metal surface and improving the wear resistance.

Description

technical field [0001] The invention relates to the technical field of metal surface strengthening technology. Background technique [0002] Titanium nitride (TiN) is a non-stoichiometric compound, which has the characteristics of both metal crystals and covalent crystals, with a melting point as high as 2955°C. As a surface coating, TiN has excellent comprehensive mechanical properties such as high hardness, wear resistance, high temperature resistance, thermal shock resistance, and low friction coefficient. It is one of the most widely researched and applied thin film materials at present. TiN has been successfully applied to tools such as cutting tools and drills as a coating, and is considered to be a revolution in the history of metal cutting tool technology development. [0003] The preparation technologies of TiN coating are mainly physical vapor deposition (PVD) and chemical vapor deposition (CVD). The PVD method has a lower formation temperature, thinner coating, ...

Claims

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Application Information

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IPC IPC(8): C23C24/10
Inventor 王辉左健民肖圣亮张荣荣童涵
Owner 路亚科消防车辆制造有限公司
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