The influence of galvannealing on the transformation of the sink-roll groove-mark defect was studied by comparing the defects on galvannealed( GA) coating with those on galvanized( GI) coating. It was found that defec...The influence of galvannealing on the transformation of the sink-roll groove-mark defect was studied by comparing the defects on galvannealed( GA) coating with those on galvanized( GI) coating. It was found that defects on GI coating contained high amounts of aluminum,zinc dross,and a zinc-iron intermetallic outburst structure,as well as slight scratches on the substrate. After being galvannealed,the aluminum content was higher and there was a much greater outburst structure,which made the coating of the defect thicker than the normal coating,while the zinc dross and scratches on the substrate had disappeared due to zinc and iron diffusion during the galvannealing process.展开更多
Cu–Nb microcomposite wire was successfully prepared by a groove rolling process.The effects of groove rolling on the diffraction peaks,microstructure,and properties of the Cu–Nb microcomposite were investigated and ...Cu–Nb microcomposite wire was successfully prepared by a groove rolling process.The effects of groove rolling on the diffraction peaks,microstructure,and properties of the Cu–Nb microcomposite were investigated and the microstructure evolutions and strengthening mechanism were discussed.The tensile strength of the Cu–Nb microcomposite wire with a diameter of 2.02 mm was greater than 1 GPa,and its conductivity reached 68%of the International Annealed Copper Standard,demonstrating the Cu–Nb microcomposite wire with high tensile strength and high conductivity after groove rolling.The results show that an appropriate groove rolling method can improve the performance of the Cu–Nb microcomposite wire.展开更多
文摘The influence of galvannealing on the transformation of the sink-roll groove-mark defect was studied by comparing the defects on galvannealed( GA) coating with those on galvanized( GI) coating. It was found that defects on GI coating contained high amounts of aluminum,zinc dross,and a zinc-iron intermetallic outburst structure,as well as slight scratches on the substrate. After being galvannealed,the aluminum content was higher and there was a much greater outburst structure,which made the coating of the defect thicker than the normal coating,while the zinc dross and scratches on the substrate had disappeared due to zinc and iron diffusion during the galvannealing process.
基金This work was financially supported by the National Key R&D Program of China(No.2016YFA0401701)the National Natural Science Foundation of China(No.51601151).
文摘Cu–Nb microcomposite wire was successfully prepared by a groove rolling process.The effects of groove rolling on the diffraction peaks,microstructure,and properties of the Cu–Nb microcomposite were investigated and the microstructure evolutions and strengthening mechanism were discussed.The tensile strength of the Cu–Nb microcomposite wire with a diameter of 2.02 mm was greater than 1 GPa,and its conductivity reached 68%of the International Annealed Copper Standard,demonstrating the Cu–Nb microcomposite wire with high tensile strength and high conductivity after groove rolling.The results show that an appropriate groove rolling method can improve the performance of the Cu–Nb microcomposite wire.
