Patent
Chrome plating of titanium
Louis W Raymond,Mark C Gussack +1 more
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TLDR
In this paper, an ADHERENT LAYERLAYER of WEAR-RESISTant HARD CHROMIUM is applied to a TITANIUM and the result is FIRMLY adherent.Abstract:
AN ADHERENT LAYER OF WEAR-RESISTANT HARD CHROMIUM IS APPLIED TO A TITANIUM OR TITANIUM ALLOY PART BY FIRST ELECTROPLATING A LAYER OF CHROMIUM ON SUCH PART, THEN SUBJECTING THE PART TO HEAT TREATMENT AT A TEMPERATURE FROM ABOUT 1600*F. TO ABOUT 1900*F. FOR A VERY BRIEF TIME (LESS THAN ONE MINUTE), TO CAUSE DIFFUSION BONDING OF THE CHROMIUM TO THE TITANIUM SUBSTRATE, AND THEN ELECTROPLATING A RELATIVELY THICK LAYER OF HARD CHROMIUM ON THE FIRST CHROMIUM LAYER. THE RESULTING HARD CHROMIUM OUTER LAYER IS FIRMLY ADHERENT, AND THE PROCEDURE AVOIDS DISTORTION OF THE TITANIUM AND MINIMIZES DETERIORATION OF ITS PHYSICAL PROPERTIES. THE FATIGUE STRENGTH OF THE TITANIUM IS INCREASED BY SHOT PEENING THE INITIAL CHROMIUM LAYER AFTER DIFFUSION BONDING THEREOF TO THE TITANIUM SUBSTRATE PRIOR TO ELECTROPLATING THE OUTER CHROMIUM LAYER.read more
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