Dental 3D printed cobalt-chrome-molybdenum alloy powder containing tantalum
3D printing is a technology based on digital model files, the use of powder metal or plastic and other adhesive materials, through the way of layer by layer printing to construct objects, with rapid forming, short processing cycle, easy to process personalized objects and complex shape objects, so it is particularly suitable for the dental repair field dental crown, bridge, bracket and other production. In order to ensure the quality of 3D printing, 3D printing powder material requirements: high purity, low oxygen content, good fluidity; The grain shape has high sphericity, small particle size and narrow distribution. For dental 3D printing alloy powder, it should also have good gold and porcelain bonding force, corrosion resistance and high temperature barbecue ability.
Cobalt-chromium-molybdenum alloy has good biocompatibility, excellent mechanical properties and corrosion resistance, and is an alloy powder commonly used in existing dental 3D printing, which is used to make dental crowns, dental Bridges, brackets and other restoration parts.
The chemical composition of the existing cobalt chromium molybdenum alloy powder was improved, a small amount of tantalum was added, and the content of molybdenum was appropriately increased. The existing preparation method of cobalt-chromium-molybdenum alloy powder is improved, which mainly involves the following two aspects: first, the ingots containing tantalum are formed by vacuum melting and casting, and then the ingots containing tantalum are melted into alloy melt for atomization powder; The second is to increase the vacuum drying process of the CoCr-Mo alloy powder containing tantalu whose particle size meets the requirements.
