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Method for strengthening compounding of TiCN on laser-induced metal surface layer taking TiO2, dimethylamine, carbon black, acetylene 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, low bonding strength, and low bonding surface strength, and achieve the effect of good hardness and wear resistance

Active Publication Date: 2013-03-27
海安华诚新材料有限公司
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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
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Effect test

Embodiment Construction

[0016] 1. Surface treatment of 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 And dimethylamine, carbon black mixture, its mass ratio is 7:4:3, and thickness is 1.5 millimeters;

[0018] 2. As the laser spot moves, the mixed gas of acetylene and nitrogen is passed through, and the flow rates of acetylene and nitrogen are 5L / min and 7L / min respectively;

[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. After testing, the surface layer of the treated carbon structural steel is compounded with TiCN up to 500 microns, and the microhardness can reach above HV2600.

[0021] 2. Surface treatment of 20MnV, 40Cr, 35CrMoV and 20CrMnSi alloy structural steel respectively:

[0022] 1. Coating industrial pure TiO on the surface of alloy structural steel 2 A...

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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, acetylene and nitrogen as components and relates to the technical field of surface strengthening of metal materials. 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 acetylene and nitrogen coexist. Through the method, TiCN can be generated on the metal surface layer through in-situ compounding so that a carbon structural steel surface is strengthened and the wear resistance is improved.

Description

technical field [0001] The invention relates to the technical field of surface strengthening of metal materials. 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 trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 王辉左健民童涵肖圣亮张荣荣
Owner 海安华诚新材料有限公司
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