Method for strengthening compounding of TiN on laser-induced metal surface layer by taking TiO2, ammonium carbonate and N2 as components
A laser-induced, ammonium carbonate technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of limited types, low bonding surface strength, poor wrapping ability, etc., to achieve the effect of good hardness and wear resistance
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[0018] 1. Surface strengthening treatment of Q235A, 20 steel, 40 steel, 45 steel, 20G, 20Mn, 40Mn and 60Mn carbon structural steel:
[0019] 1. The industrial pure TiO 2 The powder is mixed with ammonium carbonate in a mass ratio of 7:3, and the surface of the carbon structural steel is coated with industrial pure TiO with a thickness of 1.5 mm 2 Mixed powder with ammonium carbonate;
[0020] 2. With the laser spot moving, nitrogen gas is supplied, and the nitrogen flow rate is 8L / min;
[0021] 3. The laser beam is scanned at a speed of 400mm / min, the laser power is 900W, the laser wavelength is 1.06μm, and the spot diameter is 2 mm.
[0022] 4. Detection:
[0023] A TiN layer with a thickness of up to 500 microns is formed in-situ on the surface of the carbon structural steel, and the microhardness can reach HV1700.
[0024] 2. Surface strengthening treatment of 20MnV, 40Cr, 35CrMoV and 20CrMnSi alloy structural steel:
[0025] 1. The industrial pure TiO 2 The powder is mixed with am...
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