Ni Content Surface Layer Produced by Laser Surface Treatment on Amorphisable Cu Base Alloy

The aim of our research was to comparatively examine Ni content surface layers on amorphisable Cu base alloy produced by different laser surface treatments. Laser surface treatment (LST) techniques, such as laser surface melting, laser alloying and laser cladding, provide a wide range of interesting solutions for the production of wear and corrosion resistant surfaces. [1,2] With LST techniques, the surface can be: i) coated with a layer of another material by laser cladding, ii) the composition of the matrix can be modified by laser alloying. [3] Two kinds of laser surface treatment technologies were used. In the case of coating-melting technology a Ni content surface layer was first developed by galvanization, and then the Ni content layer was melted together with the matrix. In the case of powder blowing technology Ni3Al powder was blown into the layer melted by laser beam and Argon gas. LST was performed using an impulse mode Nd:YAG laser. The laser power and the interaction time were 2 kW and 20÷60 ms. The characterization of the surface layer microstructure was performed by XRD, scanning electron microscopy and microhardness measurements.

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A Comparative Examination of the Friction Coefficient of two Different Sliding Bearing

Materials Science Forum ◽

10.4028/www.scientific.net/msf.473-474.471 ◽

2005 ◽

Vol 473-474 ◽

pp. 471-476 ◽

Cited By ~ 2

Author(s):

Mária Svéda ◽

András Roósz ◽

Gábor Buza ◽

László Kuzsella

Keyword(s):

Surface Layer ◽

Surface Treatment ◽

Research Work ◽

Laser Surface ◽

Basic Material ◽

Laser Surface Treatment ◽

Treatment Technology ◽

Sliding Bearing ◽

Gas Industry ◽

Lead Layer

The aim of this research work is to investigate the sliding properties of the monotectic surface layers developed by a laser surface-treatment technology. The coatings-remelting technology has been chosen from the laser surface treatment methods. The surface of Al-Si alloy was coated with a lead layer by galvanizing, then the basic material and the surface layer were remelted together by using laser beam produced a monotectic Al- Pb surface layer. The structure of monotectic surface layer has been determined by means of a light microscope and scanning electron microscope. The sliding properties of the basic material (as cast, nearly eutectic Al-Si alloy), the Al-Si-Pb monotectic surface layer as well as the Al-Cu-Sn sliding bearing (Al-Cu matrix and Sn sliding layer) used in the gas industry have been investigated.

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Development of Amorphous and Microstructured Surface Layer by Laser Surface Treatment

Materials Science Forum ◽

10.4028/www.scientific.net/msf.752.175 ◽

2013 ◽

Vol 752 ◽

pp. 175-182 ◽

Cited By ~ 1

Author(s):

Mária Svéda ◽

András Roósz

Keyword(s):

Surface Layer ◽

Surface Treatment ◽

Amorphous Layer ◽

Laser Surface ◽

Laser Remelting ◽

X Ray Diffraction ◽

Laser Surface Treatment ◽

Microstructured Surface ◽

Treatment Techniques ◽

Laser Surface Remelting

The aim of the research was to develop an amorphous and microstructured layer on non-amorphous alloys by laser surface treatment. The as-prepared Cu based master alloy ingots were imbedded in a metallic sinking with Wood metal to assure the good thermal conductivity during the laser treatment. The laser remelting, alloying and coating techniques were applied from the laser surface treatment techniques. The surface layer production and a subsequent rapid cooling were performed using CO2 laser and pulse and continuous modes of Nd:YAG laser. The characterization of the microstructure of the resulting surface layer was investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Actual remelting on substrates showed that the process of laser remelting is a suitable technique for production of metallic glasses as surface layers. The amorphous layer up to 250 m in depth can be produced by laser surface remelting on Cu46Zr42Al7Y5 alloy.

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