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Method for strengthening compounding of TiC on laser-induced metal surface layer by taking TiO2, carbon black and acetylene as components

A laser-induced, metal surface technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of high cost, easy peeling of the coating, poor wrapping property, etc., 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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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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, acetylene is passed through, and the flow rate of acetylene is 6L / 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...

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PUM

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Abstract

The invention discloses a method for strengthening the compounding of TiC on a laser-induced metal surface layer taking TiO2, carbon black and acetylene as components and relates to the technical field of metal surface strengthening. The method comprises the following steps of: coating the mixed powder of TiO2 and the carbon black on a metal surface; and scanning on the metal surface by using a laser beam at the acetylene atmosphere, wherein the mixed powder of TiO2 and the carbon black is coated on the metal surface. Through the method, TiC 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 (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 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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