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Metal surface compound TiN strengthening method induced by laser beam combination gas tungsten arcs

A technology of gas protection and induction of metal, which is applied in the coating process and coating of metal materials, can solve the problems of low joint surface strength and easy peeling of the coating, and achieve the effect of good hardness and wear resistance

Active Publication Date: 2013-04-17
海安超明新材料有限公司
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AI Technical Summary

Problems solved by technology

[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
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Effect test

Embodiment Construction

[0019] 1. Surface treatment of Q235A, 20 steel, 40 steel, 45 steel, 20G, 20Mn, 40Mn and 60Mn carbon structural steel:

[0020] 1. Apply industrial pure TiO on the surface of carbon structural steel 2 with ammonium carbonate ((NH 3 ) 2 CO 3 ) mixed powder with a mass ratio of 7:3 and a thickness of 1.5 mm.

[0021] 2. With the movement of the laser superimposed tungsten electrode gas protection arc, nitrogen gas is passed through, and the flow rate of nitrogen gas is 8L / min.

[0022] 3. The laser beam is irradiated vertically on the surface of carbon structural steel, and the tungsten gas shielding arc forms an angle of 30° with the laser beam.

[0023] 4. The laser superimposed tungsten electrode gas shielded arc scans at a speed of 400mm / min, the laser power is 200W, the laser wavelength is 1.06μm, and the spot diameter is 2mm.

[0024] 5. The tungsten gas shielded arc uses nitrogen as the shielding gas, the flow rate is 7L / min, and the arc current is 30A.

[0025] 6. A...

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Abstract

The invention relates to the field of metal surface strengthening processing techniques, in particular to a metal surface compound TiN strengthening method induced by laser beam combination gas tungsten arcs using TiO2, ammonium carbonate, N2 gas as components. The method comprises the following steps: the metal surface is coated with mixed powder of TiO2 and ammonium carbonate; and the metal surface coasted with the mixed powder of TiO2 and ammonium carbonate is scanned by laser beam combination gas tungsten arcs in an N2 gas atmosphere. According to the method, TiN is in-situ composited on the metal surface to strengthen the metal surface and improve the wearing resistance of the metal surface.

Description

technical field [0001] The invention relates to the technical field of metal surface strengthening treatment. 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, l...

Claims

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Application Information

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IPC IPC(8): C23C26/00
Inventor 王辉左健民肖圣亮张荣荣童涵
Owner 海安超明新材料有限公司
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