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Abstract
In the course of experimental research on hardfacing materials to be used as a substitute for Co-based alloys MMA, TIG and plasma transferred arc (PTA) welding processes were used for hardfacing 1, 2 and 3-layer specimens of Fe 52 and AISI 316L steels. The following filler metals were used:
Alloy 1 (Co-Cr-W-C) Alloy 4 (Fe-Cr-Mo-V) | |||||
Alloy 2 (Ni-Cr-B-Si) Alloy 5 (Ni-Cr-C-Mo) | |||||
Alloy 3 (Ni-Cr-C-W) Alloy 6 (Fe-Cr-Mo-Mn) | |||||
Testpieces were taken from the hardfaced specimens for the following tests: high temperature hardness, impact strength, sliding wear, abrasive wear; dilatometric analysis; corrosion tests; chemical analysis; and metallographic tests.
The results show alloy 1 - chosen as the reference alloy - to have the best hardfacing properties and overall performance, and the existence of valid alternative alloys such as No. 5, 3 and 4, which nevertheless showed that they required greater care in the execution of the hardfacing.
