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Reinforcing method for compositing TiN on metal surface layer induced by laser superposed tungsten electrode gas-shielded arc

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

Active Publication Date: 2013-04-03
路亚科消防车辆制造有限公司
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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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Embodiment Construction

[0018] 1. Surface treatment of Q235A, 20 steel, 40 steel, 45 steel, 20G, 20Mn, 40Mn and 60Mn carbon structural steel:

[0019] 1. Apply industrial pure TiO on the surface of carbon structural steel 2 Powder, thickness 1.5 mm.

[0020] 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 10L / min.

[0021] 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.

[0022] 4. The laser superimposed tungsten electrode gas shielded arc scans at a speed of 500mm / min, the laser power is 200W, the laser wavelength is 1.06μm, and the spot diameter is 2mm.

[0023] 5. The tungsten gas shielded arc uses nitrogen as the shielding gas, the flow rate is 7L / min, and the arc current is 30A.

[0024] 6. According to the test results, a TiN layer with a thickness of up to 500 microns is ...

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Abstract

The invention discloses a reinforcing method for compositing TiN on a metal surface layer induced by a laser superposed tungsten electrode gas-shielded arc, and relates to the technical field of reinforcing treatment on a metal surface. The reinforcing method takes TiO2 and N2 as components. TiO2 powder is coated on the metal surface, and the laser superposed tungsten electrode gas-shielded arc is used to scan the metal surface coated by the TiO2 powder in an N2 atmosphere. According to the reinforcing method, TiN is generated on the metal surface layer in an in-situ composite manner; the metal surface is reinforced; and the wear resistance of the metal surface is improved.

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 路亚科消防车辆制造有限公司
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