Tantalum alloy shaped parts are prepared by the combination of hot stamping method and spinning method. First, the shape of tantalum alloy sheet is changed by hot stamping method, so that the shaped parts of tantalum alloy are initially formed, and the semi-finished tantalum alloy shaped parts are obtained, which reduces the influence of the anisotropy of the internal structure of tantalum alloy sheet and avoids the phenomenon of lug forming caused by direct stamping. The inner surface of the semi-finished tantalum alloy shaped part can be fully fitted with the spinning die during the spinning process, so as to ensure that the inner surface and outer surface of the spinning can be thinned evenly, and will not be folded or cracked by accumulation, which effectively controls the size and shape of the product and improves the yield of the tantalum alloy shaped part. Reduced production costs.
The forming method of the shaped tantalum alloy parts includes the following steps: Step 1, the surface of the tantalum alloy round plate is polished and hot-pressed to obtain the semi-finished tantalum alloy shaped parts; Step 2: Cold spinning or hot spinning the semi-finished tantalum alloy special-shaped parts to obtain tantalum alloy special-shaped parts blank; Step 3: Cut and machine the blanks of the shaped tantalum alloy in turn, and then perform vacuum annealing treatment to obtain the shaped tantalum alloy. The invention firstly adopts hot stamping method to make the tantalum alloy sheet preliminarily formed to obtain the tantalum alloy shaped semi-finished product, and then adopts spinning method to make the inner surface of the tantalum alloy shaped semi-finished product fully fit with the spinning die, so as to ensure that the inner surface and outer surface of the spinning are evenly thinned, and solves the problems of difficult stamping and forming and difficult control of the spinning size during the preparation of tantalum alloy thick plate shaped tantalum alloy parts. The yield of tantalum alloy shaped parts is increased, and the surface quality of tantalum alloy shaped parts is improved.
The method combines the hot stamping method and the spinning method. First, the hot stamping method is used to make the tantalum alloy sheet preliminarily formed, which reduces the influence of the anisotropy of the internal structure of the tantalum alloy sheet, and the shaped tantalum alloy semi-finished product is obtained. Then, the inner surface of the shaped tantalum alloy semi-finished product is fully fit with the spinning die by the spinning method, so as to ensure the uniform thinning of the inner and outer surfaces of the spinning. It solves the problems of difficult stamping and controlling the spinning size during the preparation of tantalum alloy special-shaped parts, improves the yield of tantalum alloy special-shaped parts, reduces the production cost and improves the surface quality of tantalum alloy special-shaped parts.
