Effect of Rare Earth Yttrium on Properties of Oxygen Free Copper Processing Material
The effects of rare earth Y on the mechanical properties,electrical conductivity and corrosion resistance of oxygen free copper processing materials were studied by micro Vickers hardness tester,eddy current conductivity meter and electrochemical workstation.The results show that with the increase of rare earth Y content,the Vickers hardness of rolling test sample decreases first and then increases gradually,and the Vickers hardness of finished annealed test sample increases gradually,and the decreasing rate of Vickers hardness of sample before and after annealing decreases gradually.With the increase of rare earth Y content,the conductivity of the rolled and annealed samples first increases and then gradually decreases,the corrosion potential Ecorr and the corrosion current density icorr of the annealed samples first decreases and then increases and then decreases,and the electrochemical impedance first increases and then decreases.The addition of 0.006%rare earth Y can improve the high temperature softening resistance,electrical conductivity and corrosion resistance at the same time,but the hardness is slightly insufficient.
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