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Ion arc induced metal surface layer composite TiN reinforcing method with TiO2, urea and N2 gas as components

A technology for inducing metal and plasma arcs, applied in the direction of heating inorganic powder coating, etc., can solve the problems of limited types, easy peeling off of coatings, poor wrapping properties, etc., and achieve the effect of good hardness and wear resistance

Active Publication Date: 2014-12-24
路亚科消防车辆制造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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
The deposition temperature of the CVD method is high, but it exceeds the heat treatment temperature of most commonly used tool materials, so the types of tool materials that can be used for coating are extremely limited; equipment, complex process and high cost, which conflicts with the green industry currently advocated
[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
Comparison scheme
Effect test

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 with urea ((NH 2 ) 2 CO) mixed powder with a mass ratio of 6:4 and a thickness of 1.5 mm;

[0020] 2. Move with the plasma arc, pass nitrogen gas, the flow rate of nitrogen gas is 7L / min;

[0021] 3. The plasma arc scans at a speed of 400mm / min, and the plasma arc current is 45A; the plasma arc uses nitrogen as the protective gas and plasma gas source, and the flow rate is 16 L / min.

[0022] 4. Test results:

[0023] The TiN 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 HV1700.

[0024] 2. Surface treatment of 20MnV, 40Cr, 35CrMoV and 20CrMnSi alloy structural steel respectively:

[0025] 1. Coating industrial pure TiO on the surface of alloy structural steel 2 with urea ((NH 2 ) 2 ...

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PUM

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Abstract

The invention discloses an ion arc induced metal surface layer composite TiN reinforcing method with TiO2, urea and N2 gas as components, and relates to the technical field of metal surface reinforcement processing. The method comprises the following steps: applying TiO2 and urea mixed powder on a metal surface, and in N2 gas atmosphere, scanning with plasma arcs on the metal surface to which the TiO2 and urea mixed powder is applied. By adopting the above method, TiN can be generated on the metal surface layer in an in-situ composite manner, thus enhancing the metal surface and improving the wear 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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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/08
Inventor 王辉陈晓龙左健民童涵肖圣亮张荣荣
Owner 路亚科消防车辆制造有限公司
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