Method for preparing molybdenum copper part with complex shape
A molybdenum-copper alloy and complex shape technology, which is applied in the field of directly preparing molybdenum-copper alloy parts with complex shapes containing 70-90wt% Mo, can solve the problems of not conforming to the development trend of material processing technology, increasing production costs, and wasting resources. Achieve the effects of easy mass production, low cost, and poor processability
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Embodiment 1
[0027] see figure 1 , figure 2 and image 3 , mix acrylamide (AM) and N,N,-methylenebisacrylamide (MBAM) at a volume ratio of 20:1, and add deionized water to prepare a premixed solution with a concentration of 20wt%; add purity ≥ 99 %, molybdenum powder with an average particle size of 6 μm and ammonium citrate with a mass ratio of 1wt%, and adding ammonia water to adjust the pH value to 9, and preparing a uniform and stable slurry with a powder volume ratio of 48% through mechanical ball milling; then Add 1.2wt% ammonium persulfate (APS) and N,N,N,N-tetramethylethylenediamine (TEMED), 0.2wt% n-octanol defoamer, and stir and mix evenly in a vacuum, Then slowly inject it into the designed and manufactured complex-shaped rubber mold cavity, and cure it at 60°C for 25 minutes to obtain a cured billet; put the cured billet in a hydrogen sintering furnace, and first heat it at 4°C / min Slowly raise the temperature to 110°C, hold it for 90 minutes to dry, then raise the temperat...
Embodiment 2
[0029] see figure 1 , Obtain solidified base by the method described in embodiment 1. Put the solidified billet in a hydrogen sintering furnace, first raise the temperature slowly at 4°C / min to 110°C, keep it for 90 minutes to dry, then raise the temperature to 550°C at a speed of 10°C / min, keep it for 30 minutes to remove the glue, and then Rapidly raise the temperature to 1200°C and hold it for 120min to obtain a molybdenum skeleton; place an oxygen-free copper sheet under the molybdenum skeleton, and finally infiltrate copper at 1180°C for 120min in a hydrogen furnace to obtain a fully dense and evenly distributed 70Mo- Cu alloy parts.
Embodiment 3
[0031] Mix methacrylamide (MAM) and diacryl tartrate diamide (DATDA) at a volume ratio of 50:1, and add deionized water to prepare a premixed solution with a concentration of 30wt%; add molybdenum powder with an average particle size of 4 μm Its mass ratio is the ammonium citrate of 1.5wt%, and adds ammoniacal liquor to regulate pH value to 9.5, prepares the uniform, stable slurry that powder volume ratio is 52% through mechanical ball milling; Add the ammonium persulfate of 2wt% subsequently ( APS) and N,N,N,N-Tetramethylethylenediamine (TEMED), 0.2wt% n-octanol defoamer, and stir quickly in a vacuum to degas and then slowly inject the designed And the manufactured metal mold cavity of complex shape, and solidified at 80°C for 20 minutes to obtain a solidified billet; put the solidified billet in a vacuum sintering furnace, first slowly raise the temperature to 110°C at 4°C / min, and keep warm Dry for 90 minutes, then heat up to 550°C at a rate of 10°C / min, hold for 30 minutes...
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