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Precision casting mirror treatment and dewaxing casting
- 2018-12-03-

Guangdong carbon steel castingIn the manufacturing process, the sulfuric acid oxide film is an important factor affecting the purity and transparency of the oxide film of stainless steel castings. The porosity, purity, thickness and sealing quality of stainless steel precision casting will directly interfere with the mirror effect of the casting.

If there are more impurities in the oxide film of stainless steel precision casting, its purity will be low and the transparency will decrease. The impurities in the oxide film mainly originate from the stainless steel casting itself, and part of it comes from the oxidation bath. Therefore, if the content of alloying elements in the casting is appropriately reduced, the impurity content can be reduced as much as possible.

The equipment required for the basic process of stainless steel precision casting is: precision casting wax injection-wax injection machine, ice water machine, air conditioner; slurry dipping-slurry bucket, floating sand machine, air conditioner, dewaxing furnace, dehumidifier, dewatering bucket, standing bucket , Dipping slurry can also use robotic arm and active wax gathering and supply system;

Gold melting-sintering furnace, high frequency furnace, shell shaker; post-processing-cutting machine, smoothing machine, sandblasting machine, sand cleaning machine, heat treatment furnace, punching machine; maintenance-pneumatic grinder, argon welding machine, smoothing machine; Quality assurance-spectrometer, three-dimensional, etc. These are relatively common, if you need more high-end, but also need vacuum casting furnace or vacuum heat treatment furnace or X-ray and so on.

Dongguan precision casting method refers to the general term of casting method in which non-metallic molds are used, and the dimensional accuracy of products is higher than that of ordinary sand mold castings, includingLost wax castingMethod or, the three types of plaster mold method and ceramic mold method. Let's take a look at it in detail below:

Dewaxing precision casting: The maximum limit length of this type of precision casting is 700mm, and the easy-to-make length is less than 200mm. The maximum weight of the casting is about 100 kg, usually less than 10 kg. The dimensional tolerances of castings are 20mm±0.13mm, 100mm±0.30mm, 200mm±0.43mm, and the dimensional accuracy of small parts cannot easily reach ±0.10mm. The angle tolerance is ±0.5~±2.0 degrees, and the minimum thickness of the casting is 0.5~1.5mm. The surface roughness of the casting is about Rmax4S~12S.

There are almost no restrictions on the materials of precision casting castings, such as aluminum alloys, magnesium alloys, titanium alloys, copper alloys, various steels, cobalt-based and nickel-based heat-resistant alloys, hard materials, for the production of complex shapes, good dimensional accuracy, and cutting. few. Dewaxed precision castings are widely used in jet engines, gas turbines, steam turbines, aircraft parts, internal combustion engines, vehicles, food machinery, printing machinery, paper machinery, compressors, valves, pumps, measuring instruments, sewing machines, weapons, Business machines, and other machine parts.

Guangdong alloy steel castingThe production value of cast steel is relatively stable, and the quality, type, function of steel castings and the share of alloy steel and special steel continue to improve. The use of various quintessence techniques and skills to develop new cast steel materials can improve the material's strong resistance and special functions.