Thorium tungsten wire used for winding microwave oven magnetron and manufacturing method of thorium tungsten wire
A manufacturing method and magnetron technology, applied in the field of metal material manufacturing, can solve problems such as low creep resistance, easy brittle fracture, and fast growth speed, so as to achieve crystal grains that are not easy to grow, reduce sintering temperature, and microstructure stable effect
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Embodiment 1
[0025] A method for manufacturing a thoriated tungsten wire for winding a microwave oven magnetron, comprising the following steps:
[0026] Step 1: Doping, mix and dry thorium nitrate solution, potassium nitrate solution, aluminum silicate solution and blue tungsten powder in the doping pot, and then send it to the reduction furnace.
[0027] Step 2: Reduction. The reduction furnace adopts a 5-stage temperature-controlled reduction process. The temperatures of the 4 stages are 550°C, 750°C, 850°C, and 950°C. / boat, the reducing atmosphere is hydrogen, and the flow rate of hydrogen is 3-5m 3 / h, reducing to obtain thoriated tungsten powder containing trace potassium elements, the powder particle size range is 1.3-1.5μm,
[0028] Step 3: High-energy ball milling, put the thoriated tungsten powder into a ball mill tank with polyurethane lining for high-energy ball milling for 3-5 hours, the ball milling medium is tungsten balls, the ball-to-material ratio is 5:1,
[0029] Ste...
Embodiment 2
[0037] A method for manufacturing a thoriated tungsten wire for winding a microwave oven magnetron, comprising the following steps:
[0038] Step 1: Doping, mix and dry the thorium nitrate solution, potassium nitrate solution, aluminum silicate solution and blue tungsten powder in the doping pot, then send them to the reduction furnace.
[0039] Step 2: Reduction, use 5-stage temperature-controlled reduction process to reduce the raw materials in the furnace, the 5-stage temperature is 550°C, 650°C, 750°C, 850°C, 950°C, and the holding time of each stage is 60-80min , the loading capacity is 300-350g / boat, the reducing atmosphere is hydrogen, and the flow rate of hydrogen is 3-5m 3 / h, reducing to obtain thoriated tungsten powder containing trace potassium elements, the powder fineness range is 1.3-1.5μm,
[0040] Step 3: High-energy ball milling, put the thoriated tungsten powder obtained in step 2 into a ball mill tank with polyurethane lining for high-energy ball milling f...
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