Study on Microstructure and Properties of Hot Processed and Resistance Welded Pure Cobalt AITranslate
Abstract AITranslate
Pure cobalt was hot processed into wire at temperatures above 600℃.The wire ends were welded by resistance welding method.The microstructure,mechanical properties and fracture mechanism of hot-processed wire and welded wire joints with different welding currents were investigated by optical microscope,universal testing machine and scanning electron microscope.The results show that the hot-processed wire has a recrystallized structure with twins and fine subgrains,and there is a residual FCC structure,locally.The fracture mechanism is micro-void coalescence.As the welding current increasing,the defect of the joint structure gradually decreases.When the current is 16.1 A,the joint structure recrystallizes and the joint strength is the highest.After the welding current is increased to 18.4 A,the joint structure has holes and the strength is reduced.The joint changes from crystal fracture to quasi-cleavage fracture with the welding current gradually increasing.When the current is 16.1 A,the fracture mechanism is micro-void coalescence and cleavage mixed fracture.The location of the fracture is in the heat affected zone at the boundary between coarse and fine grains.
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Basic Information:
DOI：
Chinese Library Classification Number:TG166.7[金属学及工艺—热处理];TG453.9[金属学及工艺—焊接]
Citation Information:
Pure cobalt was hot processed into wire at temperatures above 600℃.The wire ends were welded by resistance welding method.The microstructure,mechanical properties and fracture mechanism of hot-processed wire and welded wire joints with different welding currents were investigated by optical microscope,universal testing machine and scanning electron microscope.The results show that the hot-processed wire has a recrystallized structure with twins and fine subgrains,and there is a residual FCC structure,locally.The fracture mechanism is micro-void coalescence.As the welding current increasing,the defect of the joint structure gradually decreases.When the current is 16.1 A,the joint structure recrystallizes and the joint strength is the highest.After the welding current is increased to 18.4 A,the joint structure has holes and the strength is reduced.The joint changes from crystal fracture to quasi-cleavage fracture with the welding current gradually increasing.When the current is 16.1 A,the fracture mechanism is micro-void coalescence and cleavage mixed fracture.The location of the fracture is in the heat affected zone at the boundary between coarse and fine grains.
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| GB/T 7714-2015 | [1] ZHOU Long-hai, ZHU Wen-zhe, CAI Wen-bo. Study on Microstructure and Properties of Hot Processed and Resistance Welded Pure Cobalt[J]. Rare Metals and Cemented Carbides, 2019(2): 63-67. |
| MLA | [1] ZHOU Long-hai, et al., "Study on Microstructure and Properties of Hot Processed and Resistance Welded Pure Cobalt." Rare Metals and Cemented Carbides, no. 2, 2019, pp. 63-67. |
| APA | [1] ZHOU Long-hai, ZHU Wen-zhe, & CAI Wen-bo. (2019). Study on Microstructure and Properties of Hot Processed and Resistance Welded Pure Cobalt. Rare Metals and Cemented Carbides(2), 63-67. |
| IEEE | [1] ZHOU Long-hai, ZHU Wen-zhe, and CAI Wen-bo, "Study on Microstructure and Properties of Hot Processed and Resistance Welded Pure Cobalt," Rare Metals and Cemented Carbides, no. 2, pp. 63-67, 2019. keywords: {pure cobalt wire;resistance welding;microstructure;fracture mechanism} |