Screen sintering furnace and method for screen sintering by using such furnace
A technology of sintering furnace and wire mesh, applied in the direction of furnace, muffle furnace, cooking furnace, etc., can solve the problems of increasing production cost, wasting isolation layer, increasing cleaning process, etc., and achieve the effect of high strength of the finished product
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Embodiment 1
[0059] The first step is to prepare materials
[0060] Stack the multi-layer meshes to be sintered neatly in the order of the process requirements, and fix the four corners together by spot welding to make a sintered mesh;
[0061] The second step is to arrange the net
[0062] Put multiple sintering nets one by one on the material pallet, with an isolation layer between each sintering net, place a material pressing plate on the top of the sintering net, and put the stacked material pallet, sintering net and The material pressing plate is put into the sintering furnace;
[0063] The third step is to vacuum
[0064] Vacuum the sintering furnace so that the pressure in the sintering furnace is 1.3×10 -3 Pa;
[0065] The fourth step, heating up
[0066] Heating by the heating device. When the temperature in the sintering cavity rises to 295°C, hydrogen gas is introduced into the sintering cavity to make the pressure in the sintering cavity at 39 Pa. Continue heating to increase the temperat...
Embodiment 2
[0082] In the third vacuum stage, the pressure in the sintering furnace is 6×10 -4 Pa;
[0083] In the fourth heating stage, when the temperature in the sintering cavity rises to 305°C, hydrogen gas is introduced into the sintering cavity to make the pressure in the sintering cavity 41Pa, and heating is continued to increase the temperature in the sintering cavity to 1200 ℃;
[0084] In the fifth step of pressurization, the pressure at the sintering network is 1.5 kg / cm²;
[0085] In the heat preservation stage of the sixth step, keep the pressure and temperature for 4 hours;
[0086] In the seventh step, the temperature is naturally lowered and the pressure is removed, and the temperature is slowly lowered to 1120°C;
[0087] In the eighth step heat preservation stage, keep heat preservation for 1 hour;
[0088] In the ninth step, the rapid cooling stage, the pressure of the cooling gas introduced is 2 standard atmospheres, and the temperature rapidly drops to 310°C within 12 minutes; ...
Embodiment 3
[0092] In the third vacuum stage, the pressure in the sintering furnace is 6×10 -4 Pa;
[0093] In the fourth heating stage, when the temperature in the sintering cavity rises to 298°C, hydrogen gas is introduced into the sintering cavity to make the pressure in the sintering cavity 39.5 Pa, and heating continues to increase the temperature in the sintering cavity to 1260°C;
[0094] In the fifth step of pressurization, the pressure at the sintering network is 0.85 kg / cm²;
[0095] In the heat preservation stage of the sixth step, keep the pressure and temperature for 7 hours;
[0096] In the seventh step, the temperature is naturally lowered and the pressure is removed, and the temperature is slowly lowered to 1090°C;
[0097] In the eighth step heat preservation stage, keep heat preservation for 1.4 hours;
[0098] In the ninth step, the rapid cooling stage, the pressure of the cooling gas introduced is 1.9 standard atmospheres, and the temperature quickly drops to 300°C within 9 minu...
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