Research Development of Nanostructured Coatings Prepared by Laser Cladding

Dongsheng, 王东生 Wang; Zongjun, 田宗军 Tian; Lida, 沈理达 Shen; Zhidong, 刘志东 Liu; Yinhui, 黄因慧 Huang

doi:10.3788/cjl20083511.1698

Cited by 3 publications

(3 citation statements)

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“…It has good room and high temperature mechanical properties, good bending strength, tearing tenacity. With this feature, how to utilize the laser cladding to improve the service life of mould becomes the key issue in mould research [2][3][4][5][6] . With nanometer ceramic, SiC has characteristics of good chemical reliability, high mechanical strength and good ability for Thermal shock resistance.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Behavior of Laser Cladding SiC + Ni-WC Ceramic Coating on H13 Steel

Qiu

Shen

Wang

2012

AMR

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To obtain high properties of laser cladding layer, and to expand the service life of the mold, the laser cladding layer with Ni-WC and SiC on the surface of H13 steel made by using a laser. Then the cross-section and surface morphologies of the coatings and wear tracks were observed with a JSM-5610 type scanning microscope. The friction and properties were examined under dry sliding conditions using a WTM-1E type ball-on-disc machine. The wear mechanisms are discussed as well. The results show that the composite coating is very compact and good blinding with the substrate after laser remelting, and the wear mass loss of the composite coating reduced to about 1/4 of the matrix material.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Behavior of Laser Cladding SiC + Ni-WC Ceramic Coating on H13 Steel

Qiu

Shen

Wang

2012

AMR

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“…In laser remelting process, the temperature distribution of molten pool directly influence the convection, heat transfer, mass transfer, further influence the solidification process, the organization forms and the uniformity of coating composition, and affecting the mechanical property of parts in the end. Many scholars [7][8][9] has established the temperature field calculating models of laser remelting process through the numerical simulation method, and get temperature field distribution regularity which provided the beneficial guidance for the experiment. But the research about the effect on temperature field evolution law of process parameters was little.…”

Section: Introductionmentioning

confidence: 99%

Influence of Process Parameters on Temperature Field in Laser Remelting Coating Prepared by Plasma Spraying on Titanium Alloy Surface

Hua

Sun

et al. 2012

AMM

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In order to research the effect of process parameters on temperature field evolution in laser remelting coating prepared by plasma spraying on titanium alloy surface，the finite element model of laser multi-tracks remelting temperature field was established based on ANSYS, and remelting temperature field was analyzed. The analysis results show that: under certain scanning velocity and laser spot diameter, too small laser power can't achieve metallurgical combination between coating and substrate; the effect on temperature field of scanning velocity was smaller than laser power; the influence on molten pool center temperature and remelting width of spot diameter is bigger; preheating coating and substrate can be effectively balance remelting process temperature field, thereby reducing the thermal stress and coating cracks appear chance.Through the calculation model can master the evolution of the temperature of lasre remelting process and can provide the theory basis for process parameter selection and optimization.

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“…It has good room and high temperature mechanical properties, good bending strength, tearing tenacity. So it has been praised "omnipotent material" and "the new materials being oriented toward the 21st century" [6][7][8] . The nano ceramics provide the opportunity for the development of laser melts technology.…”

Section: Introductionmentioning

confidence: 99%

Dry Sliding Friction and Wear Behavior of WC/WC-Ni Particles Laser Cladding Reinforced by Nano TiC on Mold Steel Surface

Qiu

Guo

Wang

et al. 2011

AMR

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To reduced the defect of the layer cladding reinforced by WC/WC-Ni Particles, and to attained the effective handicraft to strengthen the properties of the mold surface, using laser cladding technique , nano TiC reinforced WC/WC-Ni composite cladding were fabricated on the surface of H13 steel substrates. The cladding microhardness was measured with Victoria-hardness tester, the cross-section microstructure of the claddings was observed with optical microscope. The fabrication of the composite claddings was investigated. The friction and properties were examined under dry sliding conditions with a WTM—1E type ball-on-disc tester. The wear tracks were observed with a JSM-5610 type scanning microscope. The wear mechanisms were discussed as well. The results showed that, owing to the NanoTiC fine-crystalline strengthening and dispersive strengthening, the Nano TiC/WC/WC–Ni composite cladding was very compact and good blinding with the substrate after laser remelting, and then sub-micro-fracture and adhesion wear of WC cladding were reduced. During the friction process, Nano TiC particles had a significant influence on the Friction and wear behavior of laser cladding: The friction coefficient reduced and wear-resistance strengthened of composites with increasing proportion of TiC. The wear mass loss of the 20% TiC composite cladding reduced to about 1/3 of those with 5% TiC cladding.

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Research Development of Nanostructured Coatings Prepared by Laser Cladding

Cited by 3 publications

References 0 publications

Microstructure and Behavior of Laser Cladding SiC + Ni-WC Ceramic Coating on H13 Steel

Microstructure and Behavior of Laser Cladding SiC + Ni-WC Ceramic Coating on H13 Steel

Influence of Process Parameters on Temperature Field in Laser Remelting Coating Prepared by Plasma Spraying on Titanium Alloy Surface

Dry Sliding Friction and Wear Behavior of WC/WC-Ni Particles Laser Cladding Reinforced by Nano TiC on Mold Steel Surface

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