Search

Laser welding method is widely used in the welding of different materials. Deep penetration, low heat input, narrow heat affect zone, low stress-strain, and distortion are important features of this welding method as compared to other joint methods. Today, it is possible to see the applications of laser welding in the repair of precious metals, moulds, and machine parts. The laser welding method is preferred in the manufacture of many parts of precious metals. Titanium and particularly Grade 2 alloys are used in a wide range of applications, from medical applications to the aerospace industry applications. Since titanium is made of precious metals, it is of great use in manufacturing without much scrap. In the joints made by welding, it is estimated that the amount of scrap loss will decrease as a result of the potential to predict the distortion that the material will undergo and to provide more controlled planning of the current production. In this study, the weldability of 0.6 mm sheet materials with laser butt-welding was investigated. The effects of pulsed micro laser welding parameters on the microstructure, mechanical properties, and surface morphology of the fractures were investigated. As a result of the microstructure examination, it was found that cross-section narrowing was seen without filling welding. Fracture of the welded joints occurred in the base metal, showing an ultimate tensile strength of approximately 248 MPa with an elongation of 26.7 %. [ABSTRACT FROM AUTHOR]

Hard chrome plating is a surface coating process to give metals wear resistance, corrosion resistance and decorative appearance. The coating process can be applied to metals with many different coating methods. These; chemical vapor deposition (CVD), physical vapor deposition (PVD), other plasma coating methods, high-speed oxy-fuel injection (HVOF) and electrolytic coating methods. Plating parameters are very important in electrolytic hard chromium plating. Current density, electrolytic bath temperature, distance between anode cathode, bath pH ratio and coating time are important parameters. In this study, hardness properties of structural steel, current density, bath temperature and anode- cathode distance values of hard chrome plating parameters were investigated by electrolytic method and optimum hardness values were determined. Signal/Noise (S/N) ratio was used in the evaluation of Taguchi L18 orthogonal sequence. The effect of control factors on the results was calculated using Variance Analysis (ANOVA). As a result, it was observed that optimization values calculated with Taguchi method and highest hardness values were reached in the same values used in the experimental study. [ABSTRACT FROM AUTHOR]

Highlights: [•] AISI 1015 on steel at room temperature were non-defect coating. [•] Samples without pre-annealing coated with Stellite 6. [•] Fine grained dendritic structure was formed as a result of microlaser welding. [•] Mechanical properties of AISI 1015 steel was improved by diffusion of Cr and Co. [ABSTRACT FROM AUTHOR]