2 results listed
Machining of many polycrystalline shape memory alloys CoNiAl (SMA) has been considerably a new phenomenon. CoNiAl alloys should be made available for final use after being formed, without loss of their shape memory properties. In this study, the effect of cutting parameters on kerf width and dimension tolerance of the Co based Shape Memory Alloy (SMA) have been investigated on the Abrasive Water Jet (AWJ) machine. After the cutting process, kerf width of the samples were investigated. The experimental results showed that water pressure, traverse speed and abrasive flow rate have a great effect on kerf width and dimension tolerance.
International Iron & Steel Symposium
UDCS
Ali GÜNEN
Mehmet DEMİR
Erdogan KANCA
Mustafa Serdar KARAKAŞ
Murat YILDIZ
Ersan KIRAR
M. Mustafa ERŞEN
Rolling has an important place in iron and steel industry due to the advantages such as production speed, continuity and easy to process applications. Roll materials must be resistant to high heat temperature conditions, high breaking resistance, good surface quality, proper hardness, good wear resistance and thermal shocks. However, producing an alloy material with all of these features together will be very costly. Instead of producing a roll material having all of these properties, it is more economical and practical approach to provide these characteristics by surface modification. In this study, External cooling rollers (ECR) coated by different four techniques which, Flame spray, boriding, titanizing and borotitanizing. After the coating process, the thickness of the coating layer, hardness, and layer structures examined by optic microscope, scanning electron microscope, micro hardness, and X-ray analyses. A wide range of coating thicknesses and microhardness values obtained depending on coating technique. The highest mircohardness obtained in the titanized sample, but the lowest coating thickness. The obtained hardness values were 3 times higher than those in the current application. The cost of rolling will be reduced by increase in ECR tool life.
International Iron & Steel Symposium
UDCS
Mehmet DEMİR
Ali GÜNEN
Mustafa Serdar KARAKAŞ
Vahdettin Koç
Mustafa Sabri Gök
Ahmet ÇÜRÜK