نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران
2 دانشکده مهندسی مکانیک، دانشگاه تربیت مدرس، تهران، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Laser cladding is an effective modification surface approach resulting in a surface with appropriate mechanical characteristics like high wear resistance, high resistance from oxidation in high temperature, suitable hardness, and high corrosion resistance. The effective parameters in this process include the power laser, relative laser speed, the type of coating material, the focal length of the laser, the diameter of the laser spot, the pulse width, etc. Here, the first three cases are considered to find optimum parameters to create proper cladding layer with excellent mechanical properties with high hardness and minimum porosity, dilution, and crack. In this research, the cladding of composite powder of TiC/316LSS with certain volume percentages (TiC/316LSS) 5, 10, 15 on steel 316LSS by using laser type Nd:YAG is investigated. Output parameters include the value of porosity in cladding, the value of transverse crack, and the value of dilution of cladding. With designing experiments and analyzing output results by using response surface method , the effect of input parameters on the quality of cladding surface is investigated. Besides, by obtaining the optimized value of input parameters for creating cladding surface with the lowest value of porosity and crack, cladding surface with hardness of 660 HV 0.1 is achieved, which is 4 times harder than substratum with hardness of 150 HV 0.1.
کلیدواژهها [English]