The Cryogenic Treatment Of The Laser Weld Junctions Of Automotive Steel

Authors : Yusuf ÖZDEMİR, Bilge DEMİR, Hayrettin AHLATCI, Yavuz SUN, Mustafa YAŞAR

Pages : 24-30

View : 46 | Download : 37

Publication Date : 2023-09-05

Article Type : Research Paper

Abstract :In this study, the effect of cryogenic treatment on the hardness and wear properties of HSLA quality commercial automotive sheet welded joints was investigated. Laser welding processes; It was applied as a solid state laser source with a laser beam power of 1 kW and a feed rate of 250 mm.s-1. This welding process was performed on both sides in the butt position and without filler metal. Cryogenic treatment has been applied to HSLA quality steels before and after welding and has been grouped as such. Cryogenic processes -196°C for 24 hours ±1 oC/min. cooling was applied at the heating rate. Abrasion tests were carried out on a linear back and forth abrasion test device under 10N and 20N loads at a total distance of 600 m. The steps were created as 200 m and weight measurements and friction coefficients were determined for each step. In the experimental results, the laser welded sample showed the best wear performance under 10 N load, while the 20 N decreased wear performance with increasing load. In addition, it was found that at increasing load, the cryogenic treatment also increased the wear resistance, and the DCT applied after laser welding showed good performance among welded specimens for wear.
Keywords : Lazer kaynağı, Aşınma, HSLA, Kriyojenik işlem