The preparation method of special-shaped ruthenium product
A special-shaped and product technology, applied in the field of preparation of special-shaped ruthenium products, can solve the problems of cracking, edge chipping, low yield, etc., and achieve the effects of reducing production cost, improving processing accuracy, and improving yield.
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Embodiment 1
[0045] Such as figure 1 As shown, a stepped ruthenium target with a conical surface is processed.
[0046] Take an appropriate amount of ruthenium powder and put it into the steel mold, using 5T / cm 2 The pressure is pressed and formed, and then the first sintering is carried out under the condition of 800°C, and the holding time is 6h; then rough machining is carried out to obtain a rough workpiece.
[0047] The rough workpiece is sintered for the second time, the sintering temperature is controlled at 1600°C, and the holding time is 12h; after the second sintering, there is a margin for finishing, which is 4% of the product size; then finish machining to reach the corresponding size Accuracy required.
Embodiment 2
[0049] On the basis of Example 1, in order to avoid the unevenness of the workpiece caused by the agglomeration of the ruthenium powder itself, the ruthenium powder was sieved before use and passed through a 200-mesh sieve.
[0050] Then put the sieved ruthenium powder into the steel mold, using 1T / cm 2 The pressure is pressed and formed, and then the first sintering is carried out under the condition of 1800 ° C, and the holding time is 3 hours; then rough machining is carried out to obtain a rough workpiece.
[0051] The rough workpiece is sintered for the second time, the sintering temperature is controlled at 2300°C, and the holding time is 6h; after the second sintering, there is a margin for finishing, which is 2% of the product size; then finish machining to reach the corresponding size Accuracy required.
Embodiment 3
[0053] Processing stepped ruthenium targets:
[0054] Sieve the ruthenium powder before use and pass through a 300 mesh sieve.
[0055] Then, the sieved ruthenium powder was pressed into shape by cold isostatic pressing, and the cold isostatic pressing adopted two stages of holding pressure, the first stage holding pressure was 80Mpa, and the time was 60s; the second stage holding pressure was 200Mpa, and the time was 30s.
[0056] Then carry out the first sintering under the condition of 1000 ℃, holding time for 4h; then carry out rough machining to obtain the rough workpiece.
[0057] The rough workpiece is sintered for the second time, the sintering temperature is controlled at 2000°C, and the holding time is 8h; after the second sintering, there is a margin for finishing, which is 3% of the product size; then finish machining to reach the corresponding size Accuracy required.
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Abstract
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