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Method for strengthening compounding of TiCN on laser-induced metal surface layer taking TiO2, dimethylamine, carbon black, methane and nitrogen as components

A technology of laser induction and dimethylamine, which is applied in the coating process and coating of metal materials, can solve the problems of high cost, poor coating performance, and low joint surface strength, and achieve the effect of good hardness and wear resistance

Active Publication Date: 2013-03-27
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 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] Regardless of the CVD or PVD method, the TiCN coating obtained is relatively thin, with a thickness of only a few microns (μm), and the coating is mechanically bonded to the substrate, the strength of the bonding surface is low, and the coating is prone to peeling off during use.

Method used

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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. Coating industrial pure TiO on the surface of carbon structural steel 2 And dimethylamine, carbon black mixture, its mass ratio is 7:4:3, coating thickness is 1.5 millimeters;

[0019] 2. As the laser spot moves, a mixed gas of methane and nitrogen is passed through, and the flow rates of methane and nitrogen are 9L / min and 7L / min respectively;

[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 TiCN 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...

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Abstract

The invention discloses a method for strengthening the compounding of TiCN on a laser-induced metal surface layer by taking TiO2, dimethylamine, carbon black, methane and nitrogen as components and relates to the technical field of metal surface strengthening. The method comprises the following steps of: coating the mixture of TiO2, the dimethylamine and the carbon black on a metal surface; and scanning on the mixture-coated metal surface by using a laser beam under the condition that methane and nitrogen coexist. Through the method, TiCN can be generated on the metal surface layer through in-situ compounding so that the metal surface is strengthened and the wear resistance is improved.

Description

technical field [0001] The invention relates to the technical field of metal surface strengthening. Background technique [0002] Titanium carbide nitride (TiCN) is a non-oxide material with excellent performance and wide application. It is also a coating material with excellent performance. It is an infinite solid solution of titanium carbide and titanium nitride, and has both titanium carbide and titanium nitride. It has the advantages of high hardness, wear resistance, corrosion resistance, oxidation resistance, etc., and has good thermal conductivity, electrical conductivity and chemical stability. It is widely used in cutting tools, powder metallurgy and cermet products. It is the current research and One of the most widely used thin film materials. [0003] The preparation techniques of TiCN 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 tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 王辉左健民张荣荣童涵肖圣亮
Owner 路亚科消防车辆制造有限公司
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