ﺑﺴﻢ ﷲ اﻟﺮﺣﻤﻦ اﻟﺮﺣﻴﻢ IMPROVING THE PROPERTIES OF TITANIUM ALLOYS BY LASER TREATMENT AT ROOM TEMPERATURE IN THE NORMAL ATMOSPHERE WITHOUT EXTERNAL MEDIA
HEBATALRAHMAN –EGYPT Patent no24014-Egyptian Patent Office Hebatalrahman11@yahoo.com Mob:0020126020076-tel :0020223634880 Add: 13 elzobir bin elawam st,sadat land, elmalek elsaleh,cairo, Egypt
Hardness improve by 36%, Wear rate improve by 99.5%, and Grain size decrease from 10 to 7.5 ASTM, treated layer thickness 250nm
500 400 300 Microhardness (VH)
200
before irradiation
100
after irradiation
0 Ti alloy
Steel
Alloy Type
Industrial Features * Processing is performed directly in the air and without any intermediate liquid or gas. * New method does not use expensive chemicals such as surface coverage. *New method does not include any complex interactions, hazardous wastes or harmful gases may affect environment. * Laser treatment process is relatively economic. It does not need a huge industrial equipment in a great place for the installation and operation of such equipment. • The main components in the new method are only the laser source and optical parts. • it is considered as the only surface treatment method is done in the field.
After treatment
Before treatment
Titanium alloys are the workhorse alloys in different applications. To overcome high cost of these alloys the efficiency and life time of the alloys must be increased.Laser irradiation of Ti6Al4VELIat room temperature and in the normal atmosphere without any external media improve surface hardness and wear. Laser treatment is suitable for both field works and industry. The improve in mechanical properties occurs due to microstructure changes without significant change in chemical composition, so laser irradiation is suitable for medical applications.