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Strengthening method for compounding TiN on metal surface layer by inducing through laser overlying tungsten electrode gas-shielded arc

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

Active Publication Date: 2013-03-27
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

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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 urea ((NH 2 ) 2 CO) mixed powder with a mass ratio of 6:4 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 7L / 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. According to the te...

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Abstract

The invention relates to a strengthening method for compounding TiN on a metal surface layer by taking TiO2, carbamide and N2 gas as components and inducing through a laser overlying tungsten electrode gas-shielded arc, relating to the technical field of metal surface strengthening treatment. TiO2 and carbamide mixed powder is coated on a metal surface, and the metal surface coated with the TiO2 and carbamide mixed powder is scanned by using the laser overlying tungsten electrode gas-shielded arc. The strengthening method disclosed by the invention can be used for generating the TiN on the metal surface layer in a in-situ compounding way, thereby strengthening the metal surface and enhancing the abrasion resistance.

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): C23C24/10
Inventor 王辉左健民张荣荣童涵肖圣亮
Owner 海安超明新材料有限公司
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