Tantalum and tantalum alloy parts preparation method, tantalum powder or tantalum alloy powder, dispersant into the ball mill for dissociation, ball grinding; Tantalum or tantalum alloy powder after ball milling was added into the photocuring monomer, then dispersant and defoamer were added, and photo initiator was added under the condition of avoiding light, and the mixed slurry was obtained. The mixed paste is added to the optical curing equipment, and the raw tantalum and tantalum alloy parts are printed layer by layer and point by point according to the three-dimensional model by using ultraviolet light beam and surface exposure or point scanning. Finally, the raw billet is put into the sintering furnace for degreasing and hot isostatic pressing, and tantalum and tantalum alloy parts are obtained. The preparation method of the invention adopts the photocuring forming technology, which can prepare any complex shape parts, avoid the dependence on the mold, shorten the processing time, reduce the manufacturing cost, and improve the forming efficiency of tantalum and tantalum alloy parts.
Tantalum and tantalum alloy have high density, corrosion resistance, excellent high temperature strength, good processability and low plastic/brittle transition temperature and other excellent properties, most of them are concentrated in high temperature structural materials and corrosion resistant materials, so it has a wide range of applications in aviation, aerospace and chemical industry. Tantalum and tantalum alloys are formed by powder metallurgy process or melting process, combined with traditional machining methods. Traditional metal billets are generally processed by forging heat treatment, combined with hammering or stamping to form parts, but tantalum and tantalum alloys are prone to oxidation during hot processing, and even embrittlement occurs when the temperature is higher. Traditional processing technology is mostly used to produce small and simple products, for complex structural parts, traditional processing methods can not meet.
The cold processing technology of light curing forming avoids the burning and segregation in the melting/solidification process of conventional hot processing technology, and there is no solidification crack and reheat crack, which greatly reduces the accumulation of thermal stress and thermal deformation. At the same time, combined with specific degreasing and sintering process steps, to ensure that the forming parts have high density, improve the comprehensive mechanical properties of the forming parts. In addition, the use of light curing forming can effectively realize the plasticity and complexity of the structure of the parts, and avoid the problems of high manufacturing costs and long construction periods caused by the composite manufacturing of various processes in traditional processing.
