Classification of laser beam induced surface engineering technologies andin situsynthesis of steel matrix surface nanocomposites

Abstract

A new classification of different laser beam induced surface engineering technologies is offered in this paper. An in situ laser melt injection technology is applied in this paper to modify the surface of an inexpensive carbon steel substrate. Relatively large WCzTi particles were blown into a laser melt steel pool, and the desired (Ti,W)C carbide particles were precipitated upon cooling and solidification. Although these primary (Ti,W)C carbide particles were micrometre sized, additional nanosized (Fe,W) 6 C particles were found to precipitate during the subsequent heat treatment from an oversaturated steel matrix. Thus, a steel matrix surface nanocomposite was produced by the combination of in situ laser melt injection technology and subsequent heat treatment.

Influence of Nd:YAG Laser Energy on Mechanical properties of Nitriding Steel

“…Wear rate was calculated for the samples by applying equation (1) and (2),taken at least three reading for mass loss at different time (10,20,30) min, with rotating speed 490 r.p.m.at laser energy (0.89 ,2,4and9J).An increase laser energy lead to increase in mass loss as shown in Fig.8. Wear rate decreases with increase hardness values due to martensite formation when increase laser energy as shown in Fig.10.These results is agreements with research [15,16].…”

Experimental Studies of Different Strength Steels MIG Brazed Joints

“…A lot of paper deals with the modification of surface properties to increase the surface energy (decrease the contact angle to the way of hydrophilic), with these techniques the quality of the joints can be improved. The surface modification could be a laser beam treatment (Hlinka et al, 2017;Verezub et al, 2011). In this study the contact angle represent the quality of the connection between the copper filler wire and the DP, DC steels.…”

Microstructure Evolution of TiC Particles In Situ, Synthesized by Laser Cladding

“…Due to the properties of metal matrix composite coatings, the selectivity of the manufacturing process mainly focuses on various high-energy beam technologies, such as welding arc [ 4 ], plasma arc [ 5 ], electron beam [ 6 ] and laser beam [ 7 ]. Among them, laser surface processing has attracted considerable attention to produce MMC coatings as a result of (a) contactless and non-vacuum; (b) high-speed and easy automation; (c) and flexibility for various working conditions with the developing of laser manufacturing technology [ 7 , 8 , 9 ].…”