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Laser induced metal surface layer composite TiC reinforcing method with TiO2, carbon black and methane as components

A laser-induced, metal surface technology, applied in the field of metal surface strengthening, can solve the problems of high cost, low bonding strength, poor wrapping property, etc., and achieve the effect of good hardness and wear resistance

Active Publication Date: 2014-12-24
路亚科消防车辆制造有限公司
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  • Summary
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AI Technical Summary

Problems solved by technology

The deposition temperature of the CVD method is high, exceeding the heat treatment temperature of most steel materials, and CVD uses chlorides as raw materials, and requires a set of equipment for preparing Ti-containing halide gases. The process is complicated and the cost is high, which is different from the current green industry. contradict
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
[0004] Whether it is CVD method or PVD method, the TiC coating obtained is relatively thin, with a thickness of only a few microns (μm), and the coating is mechanically bonded to the substrate, the bonding surface strength 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

[0017] 1. Surface treatment of Q235A, 20 steel, 40 steel, 45 steel, 20G, 20Mn, 40Mn and 60Mn carbon structural steel:

[0018] 1. Apply industrial pure TiO on the surface of carbon structural steel 2 Mix powder with carbon black, its mass ratio is 7:3, and thickness is 1.5 millimeters;

[0019] 2. With the movement of the laser spot, methane is passed through, and the flow rate of methane is 9L / min;

[0020] 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.

[0021] 4. According to the test results, a TiC 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 above HV2600.

[0022] 2. Surface treatment of 20MnV, 40Cr, 35CrMoV and 20CrMnSi alloy structural steel respectively:

[0023] 1. Coating industrial pure TiO on the surface of alloy structural steel 2 Mix powder with carbon black, its mass ratio is 7:3,...

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PUM

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Abstract

The invention discloses a laser induced metal surface layer composite TiC reinforcing method with TiO2, carbon black and methane as components, and relates to the technical field of metal surface reinforcement. The method comprises the following steps: applying TiO2 and carbon black mixed powder on a metal surface, and in methane atmosphere, scanning with laser beams on the metal surface to which the TiO2 and carbon black mixed powder is applied. By adopting the above method, TiC 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. Background technique [0002] Titanium carbide (TiC) is a typical transition metal carbide, the bond type is mixed in the same crystal structure by ionic bonds, covalent bonds and metal bonds, and its melting point is as high as 3160 °C. As a surface coating, TiC has excellent comprehensive mechanical properties such as high hardness, high melting point, wear resistance, and high temperature oxidation resistance. It is one of the most widely researched and applied thin film materials at present. [0003] The preparation technologies of TiC coating are mainly chemical vapor deposition (CVD) and physical vapor deposition (PVD). The deposition temperature of the CVD method is high, exceeding the heat treatment temperature of most steel materials, and CVD uses chlorides as raw materials, and requires a set of equipment for preparing Ti-containing halide gases. The process is comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08
Inventor 王辉陈晓龙左健民童涵张荣荣肖圣亮
Owner 路亚科消防车辆制造有限公司
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