TiC/cobalt-based alloy composite coating on surface of nodular cast iron, and laser-cladding preparation process and application thereof
A cobalt-based alloy and nodular cast iron technology, applied in the coating process and coating of metal materials, can solve the problems of large quenching deformation, long treatment cycle, failure, etc., and achieve enhanced surface wear resistance, excellent wear resistance, The effect of reducing wear failure
Active Publication Date: 2016-10-26
SHENYANG AEROSPACE UNIVERSITY
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Problems solved by technology
[0002] Ductile cast iron has excellent comprehensive mechanical properties, but in the process of use, it usually fails due to wear and tear. It has been treated with surface strengthening treatment by nitriding, induction hardening and other processes, but there are problems such as long treatment period, thin hardened layer, The hardness of the hardened layer is not high enough and the quenching deformation is large, so the use effect is not ideal
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Embodiment 1
[0026] Experimental materials: the matrix material is ductile iron, the laser cladding material is TiC / cobalt-based alloy composite powder, the cobalt-based alloy is cobalt-chromium-tungsten alloy (CoCrW), the particle size of cobalt-based alloy powder is 150-320 mesh, and the particle size of TiC powder is 5 ~50 μm.
[0027] The preparation process of the TiC / cobalt-based alloy composite powder is as follows: mix TiC powder and cobalt-based alloy (CoCrW) powder according to the required ratio, and use a grinder to uniformly mix, and the mixing time is 30 minutes; the mixed powder is placed in an oven Carry out drying treatment, the drying temperature is 180 ° C, and the drying time is 3 hours, and the TiC / cobalt-based alloy composite powder is obtained; in the composite powder, the volume ratio of TiC powder is 5%, 10% and 30% respectively. %.
[0028] The specific process of the laser cladding technology in this embodiment is as follows:
[0029] Before laser cladding, cle...
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Abstract
The invention discloses a TiC / cobalt-based alloy composite coating on the surface of nodular cast iron, and a laser-cladding preparation process and application thereof, belonging to the technical field of laser cladding technology and coating preparation. According to the invention, TiC / cobalt-based alloy composite powder is used as a laser-cladding material, and the TiC / cobalt-based alloy composite coating is preapared on surface of nodular cast iron by using laser cladding technology. TiC accounts for 0 to 30% of the volume of the composite coating material; and the maximum hardness of the coating is 1200 to 1300 HV0.2, more than five times of the hardness of a nodular cast iron matrix. The composite coating is applied to nodular cast iron parts used under severe wearing conditions.
Description
technical field [0001] The invention relates to the technical fields of laser cladding technology and coating preparation, in particular to a TiC / cobalt-based alloy composite coating on the surface of nodular cast iron and its laser cladding preparation process and application. Background technique [0002] Ductile cast iron has excellent comprehensive mechanical properties, but in the process of use, it usually suffers from wear and tear, etc. It has been subjected to surface strengthening treatment by nitriding, induction hardening and other processes, but there are problems such as long treatment period, thin hardened layer, The hardness of the hardened layer is not high enough and the quenching deformation is large, so the use effect is not ideal. [0003] Laser cladding technology refers to pre-preparing coating materials on the surface of the substrate to be clad in different ways, melting with a thin layer of the substrate surface at the same time through laser irradi...
Claims
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IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 童文辉赵子龙王杰国旭明
Owner SHENYANG AEROSPACE UNIVERSITY