Search published articles


Showing 2 results for Laser Coating
Experimental investigation of the laser coating process of the inconel 718 powder on the H13 steel
M. Safari, A. Ahadi,
Volume 9, Issue 1 (5-2023)
Abstract
In the present research, the coating process of Inconel 718 powder on the H13 steel substrate by direct powder deposition method with the help of 1 KW continuous fiber laser has been investigated. Hence, the effects of process parameters such as laser power, powder feed rate and laser scanning speed on the geometrical characterstics of the clad such as height and width of the clad are examined. In order to perform a comprehensive investigation on the effect of input parameters and their interactions on the height and width of the clad, design of experiment method based on response surface methodology is employed. The results show that the laser scanning speed and powder feed rate are as the important factors affecting the clad height, so that the clad height increases with increasing powder feed rate and decreasing laser scanning rate. Also, it is proved that by increasing the laser power and decreasing the laser scanning speed the width of the clad is increased.

Microstructural characterization of the effect of energy density on direct laser deposition of stellite 6 on 316 stainless steel
S. H. Hashemi, R. Vafaei, R. Shoja-Razavi,
Volume 9, Issue 2 (1-2024)
Abstract
316 steel is used in transportation, space, and chemical equipment. This steel is in demand in these industries due to its durability. It is used to increase the lifespan and renovate equipment. The research explores the impact of laser energy density on st6 cladding. It specifically focuses on the microstructure and geometric characteristics of the cladding. The cladding is applied on 316 steel. The experiment was designed with energy density changes from 40 to 116 J/mm and powder rate changes between 12 and 20 g/min. Optical and electron microscopic images were used to evaluate the samples. The results indicated that the dendritic arms grew larger with increased energy density. The dimensions increased from 1.5 to approximately 3. In other words, the speed of cooling is doubled. Increasing energy density from 40 to 75 J/mm reduced cobalt to chromium ratio from 2 to 0.7. It also decreased cobalt to iron ratio from 35 to 3. The changes emphasize how energy density affects microstructure and phase transformations.

Page 1 from 1     

© 2024 CC BY-NC 4.0 | Journal of Welding Science and Technology of Iran

Designed & Developed by : Yektaweb