چکیده مقاله
In this study, the microstructure and hardness of 1 7219 steel in the welding process using a continuous fiber laser were investigated The effect of laser power and welding speed on the geometric characteristics, microstructure, and hardness of the fusion zone and heat affected zone HAZ was evaluated Studies have shown that with increasing laser power, the depth of weld penetration increases, and due to the heat concentration and high cooling rate in laser welding, martensitic microstructures were observed in the weld zone and in the HAZ The presence of this type of microstructure clearly showed its effect on hardness changes The hardness of the base metal was in the range of 190±10 HV The hardness values for the heat affected zone and the fusion zone increased with the laser power used for welding and were in the range of 450 656 ±10 HV Comparison of the hardness values in the samples showed that increasing the laser power increased the heat input and hardness of the microstructure in the fusion zone and HAZ and increased the possibility of defects formation and propagation in weld zone
کلیدواژهها
نویسندگان
Mahdi Shojaee
Iranian National Center for Laser Science and Technology, Tehran, Iran
Ali Chehreghani
Iranian National Center for Laser Science and Technology, Tehran, Iran
Mohammad Javad Sobhani
Iranian National Center for Laser Science and Technology, Tehran, Iran
Mohammad Hosein Rahimi
Iranian National Center for Laser Science and Technology, Tehran, Iran
Reza Azmodeh
Iranian National Center for Laser Science and Technology, Tehran, Iran
Saifullah Asadollahi
Iranian National Center for Laser Science and Technology, Tehran, Iran
شیوه ارجاع
Shojaee, Mahdi and Chehreghani, Ali and Sobhani, Mohammad Javad and Rahimi, Mohammad Hosein and Azmodeh, Reza and Asadollahi, Saifullah,1404,Evaluation of the Microstructure and Microhardness of Laser Welded Low-Alloy Chromium-Molybdenum Steel,8th International Conference on Welding and Non Destructive Testing & 26th National Conference on Welding & Inspection & 15th National Conference on NDT & 4th National Conference on Additive Manufacturing,Tehran
ارائهشده در
مجموعه مقالات هشتمین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب، بیست و ششمین کنفرانس ملی جوش و بازرسی، پانزدهمین کنفرانس ملی آزمایش های غیرمخرب و چهارمین کنفرانس ملی ساخت افزایشی20 بهمن 1404 · تهران