1) Preparazzjoni ta ' doped tungstenu trab: put il oriġinali tungstenu (WO2.. 9) trab u l imħallat soluzzjoni of H2SiO3 u KOH fih SIO2: 0.2~0.6wt percent and K2O: 0.2~0.7d.6wt percent and AI (NO3) 3 containing AI2O3: 0.02~0.1wt percent into the mixer, mix them at 50~60 degree C għal 3~5 hours, dry them at 100~200 degree C for 3~6 hours, and achieve doped blue tungstenu powder;
2) Reduction treatment: put the doped tungsten powder in a boat at 500~950 degree C and hydrogen atmosphere for reduction treatment for 8~12 hours, and pass through 100~200 mesh sieve after cooling to obtain doped tungsten powder;
3) Pickling: First, dilute hydrochloric acid with a concentration of 3-6}wt percent is used to pickle the doped tungsten powder for 30-60} minutes, then the supernatant is removed, and hydrofluoric acid with a concentration of 3-6}wt percent is Added to wash the powder sail the Si content is s250ppm and the AI content is Less than or equal to 30ppm. Then, il trab is vacuum imnixxef at a temperatura ta 70-150 degree C for no less than 10 hours. After drying, it is dispersed and impurity removed through a 160~200 mesh passatur;
4) Kompattazzjoni: press the trab miksub minn 3 trattamenti fi doped tungstenu billets under the pressure of 150~250MPa;
5) Pre sintering: the pressed blank is put in a boat vessel and sintered for 30~60 minutes under hydrogen atmosphere and 1100~1400 degree C temperatura
6) Vertical melting sintering: place the pre sintered billets in a vertical furnace, sinter them in a hydrogen atmosphere and 70~92 percent of the current intensity of the current intensity of the fusing current for 10~25 minutes, and then cool them in the furnace to achieve non compact potassium tungsten bars;
7) Indirect sintering: place the tungstenu bars obtained in the 6 processes in the medium frequency furnace or tungstenu rod furnace, and sinter them for for 2~6 hours in hydrogen atmosphere and at the temperature of 2000~2300 degree C. After cooling in the furnace, the target metal tungsten bars fihom potassium can be obtained.
Amanda
Kumpanija: Baoji Dynamic Trading Co., Ltd
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