A metal mold precision casting method for zirconium alloy
A technology of precision casting and zirconium alloy, which is applied in casting molding equipment, metal processing equipment, casting molds, etc., can solve the problems of rough surface processing of casting molds, rough surface of castings, deformation of mold shells, etc., and achieve surface roughness improvement, surface Smooth and smooth, the effect of reducing the chilling effect
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Embodiment 1
[0020] A metal mold precision casting method for zirconium alloys, taking the production of zirconium alloy plug valves with a material grade of 702C as an example, the process steps are as follows:
[0021] (1) The cast steel material is used as the mold material, and the cast steel block is processed into a mold by mechanical processing according to the casting process drawing. After the mold processing is completed, sandblasting is used to remove surface rust and other residues, and then the surface is cleaned with alcohol or acetone to remove oil and other dirt. Finally, the metal mold is preheated to 120°C and cooled to room temperature.
[0022] (2) Using the vacuum consumable shell melting method, first put the consumable electrode with the brand name R60702 into the vacuum consumable electrode shell solidification furnace, the gap between the consumable electrode and the inner wall of the crucible is 40-120 mm, start Vacuum pump, pumped to a vacuum degree ≤ 10 -2 Aft...
Embodiment 2
[0024] A metal mold precision casting method for zirconium alloys, taking the production of zirconium alloy check valves whose material grade is 702C as an example, the process steps are as follows:
[0025] (1) The cast copper material is used as the casting mold material, and the cast copper block is processed into a mold by mechanical processing according to the casting process drawing. After the mold processing is completed, sandblasting is used to remove surface rust and other residues, and then the surface is cleaned with alcohol or acetone to remove oil and other dirt. Finally, the metal mold is preheated to 120°C and cooled to room temperature.
[0026] (2) metal type coating is prepared by yttria 50wt%, zirconia 9wt%, zirconium acetate solution 40%wt% (concentration is 40wt%), surfactant JFC 0.5wt% and defoamer n-butanol 0.5wt% become. The particle size of the powder is less than 270 mesh, and it is stirred for 4 hours. The ambient temperature is controlled at 16-2...
Embodiment 3
[0030] A metal mold precision casting method for zirconium alloys, taking the zirconium alloy pump body whose material grade is 705C as an example, the process steps are as follows:
[0031] (1) The cast iron material is used as the mold material, and the cast iron block is processed into a mold by mechanical processing according to the casting process drawing. After the mold processing is completed, sandblasting is used to remove surface rust and other residues, and then the surface is cleaned with alcohol or acetone to remove oil and other dirt. Finally, the metal mold is preheated to 120°C and cooled to room temperature.
[0032] (2) The metal type coating is prepared from 68wt% of yttrium oxide, 30wt% of zirconium acetate solution (concentration is 40wt%), 1wt% of surfactant JFC and 1wt% of defoamer n-butanol. The particle size of the powder is less than 270 mesh, and it is stirred for 4 hours. The ambient temperature is controlled at 16-28°C, the humidity is controlled ...
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Abstract
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