| Cobalt-based alloys due to good mechanical properties, corrosion resistance and biocompatibility, has been widely used in the medical field of metal materials, including cobalt-based alloy medical L605 is a typical representative. However, current clinical medical cobalt-based alloys only serve as a substitute for bone implant endurance. Cu is a recognized antibacterial element, has a very long history. In this study, the characteristics of Cu antibacterial cobalt-based alloys combine excellent medical properties to develop new cobalt-based alloys with antimicrobial properties. In this paper, according to JIS T7402-3-2005 standard ingredients, prepared using a vacuum smelting cobalt-based alloy L605 and adding Cu element cobalt-based alloy L605 Cu after two materials were investigated structure, mechanical properties of the two materials research, resistance corrosion and thermal processing performance. By scanning electron microscopy, DSC analysis of microstructure and hardness testing and performance in research in solid solution of two alloys, by room-temperature tensile mechanical tensile properties of the two materials analysis test solution under the experimental condition, by electrochemical etching method to study the corrosion resistance of the solution-state two materials, experimental study of the thermal deformation behavior of the two alloys compressed by high temperature heat. The main draw the following conclusions:（1） Cobalt-based alloys L605 and cobalt-based alloys L605 Cu material forging state after 1200℃1h after solution treatment, the organization are the austenitic structure, lamellar twins in the grain boundaries or grain. DSC analysis of two material is heated to about 900 ℃, both presence of a phase transition. Grain size of Cu added cobalt-based alloy L605 Cu material has increased, the hardness decreased slightly.（2） Cobalt-based alloys L605 and cobalt-based alloys L605 Cu material, material yield strength, tensile strength, elongation, and reduction of rates to meet industry standards（JIS T7402-3-2005）. The yield strength and tensile strength of Cu added cobalt-based alloy material L605 Cu slightly reduced, but elongation and reduction of materials increased by more than 10%, Improve the ductility and toughness and mechanical properties of the material processed.（3） The electrochemical results showed that: a cobalt-based alloy L605 and cobalt-based alloy L605 Cu compared to the polarization resistance and corrosion potential decreased, pitting potential decreased slightly but the difference is small, a weak corrosion current increased slightly corrosive decline. But cobalt-based alloy L605 Cu material remained good corrosion resistance.（4） Cobalt-based alloy L605 hot deformation activation energy 549.73237kJ/mol, its thermal deformation equation is:)/37.549732exp（）]1024604.3[sinh(1036162.305427.6319-××=RT-&σε Cobalt-based alloy L605 optimum thermal processing window as follows: ε&=3.0,T=10501070℃, ε =0.10.22s-1 and T=11701230℃, ε =0.10.36s-1;ε&=4.0,T=10501160 ℃, ε =0.10.22s-1 and T=11601250 ℃, ε =0.10.82s-1; ε&=5.0,T=10501160℃, ε =0.10.30s-1 and T=11601220℃, ε =0.11.2s-1 and T=12201250℃,ε =0.4510s-1;ε&=6.0,T=10501140℃,ε =0.10.40s-1 and T=11401210℃,ε =0.14.95s-1 and T=12101250 ℃, ε =0.6710s-1; ε&=7.0, T=10501140 ℃, ε =0.10.82s-1 and T=11401210℃,ε =0.110s-1 and T=12101250℃,ε =0.6110s-1;ε&=8.0,T=10501130℃,ε =0.11.82s-1 and T=11301250℃, ε =0.2210s-1。（5） Cobalt-based alloys L605 Cu hot deformation activation energy 674.23224 kJ / mol, its thermal deformation equation:)/24.674232exp（）]1011938.3[sinh(1003128.162805.7323-××=RT-&σε Cobalt-based alloys L605 Cu optimum thermal processing window as follows: ε&=1.0,T=11801220℃,ε =0.10.16s-1;ε&=2.0,T=11501240℃,ε =0.10.18s-1;ε&=3.0,T=11101150 ℃, ε =0.10.15s-1 and T=11501250 ℃, ε =0.10.18s-1; ε&=4.0,T=10801140 ℃, ε =0.10.16s-1 and T=11401250 ℃, ε =0.10.22s-1; ε&=5.0,T=10701140 ℃, ε =0.10.20s-1 and T=11401250 ℃, ε =0.10.37s-1; ε&=6.0,T=10501150 ℃, ε =0.10.20s-1 and T=11501250 ℃, ε =0.10.61s-1; ε&=7.0,T=10501140 ℃, ε =0.10.20s-1 and T=11401250 ℃, ε =0.12.23s-1; ε&=8.0,T=10501140℃, ε =0.10.20s-1 and T=11401230℃, ε =0.10.4.48s-1 and T=12301250℃,ε =0.3610s-1;ε（5）=9.0,T=10501130℃,ε =0.10.33s-1 and T=11301220℃,ε =0.110s-1and T=12201250℃, ε =0.4410-1。... |
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