چکیده مقاله
In this study, the effect of solution annealing on the microstructure and weldabilityof aged HP heat resistant steel was investigated The microstructure of the alloy wasinvestigated using an optical and scanning electron microscope To evaluate the weldabilityand susceptibility to hot cracking, the longitudinal varestraint test was used It was found thatthe long term service in high temperatures caused many metallurgical changes such as theformation of Cr23C6 chromium carbide and the transformation of NbC niobium carbide intoG phase with Ni16Nb6Si7 composition Studies have shown that solution annealing for 2 hoursat 1200 degrees Celsius has caused the dissolution of precipitates and the microstructure toreturn to conditions before aging The results of the varestraint test showed that aging hascaused a sensible increase in susceptibility to hot cracking and a decrease in weldability It wasfound that solution annealing improved the weldability and reduced susceptibility to hotcracking of this alloy After solution annealing, no sensitivity to hot cracking was observed inaugmented strain below 2%
کلیدواژهها
نویسندگان
Jamal Hussain Mansoor
Ph D candidate, Department of Materials Science & Engineering, Faculty of Engineering,Shahid Chamran University of Ahvaz, Ahvaz, Iran
Reza Dehmolaei
Assistant Professor, Department of Materials Science & Engineering, Faculty of Engineering,Shahid Chamran University of Ahvaz, Ahvaz, Iran
Mostafa Eskandari
Assistant Professor, Department of Materials Science & Engineering, Faculty of Engineering,Shahid Chamran University of Ahvaz, Ahvaz, Iran
SeyedReza Alavi Zaree
Assistant Professor, Department of Materials Science & Engineering, Faculty of Engineering,Shahid Chamran University of Ahvaz, Ahvaz, Iran
شیوه ارجاع
Hussain Mansoor, Jamal and Dehmolaei, Reza and Eskandari, Mostafa and Alavi Zaree, SeyedReza,1401,Improving the weldability of HP heat-resistant steel modified byniobium after long-term service at high temperature,5th International Conference on Welding and Non Destructive Testing & 23rd National Conference on Welding & Inspection & 12th National Conference on NDT,Isfahan
ارائهشده در
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