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Stainless steel castings

Description:
The types of materials that can be investment cast are Stainless steel castings,Metal casting,Aluminum alloys, Bronzes, tool steels, Stellite, Hastelloys, and precious metals. Parts made with investment castings often do not require any further machining, because of the close tolerances that can be achieved. 
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The types of materials that can be investment cast are Stainless steel castings,Metal casting,Aluminum alloys, Bronzes, tool steels, Stellite, Hastelloys, and precious metals. Parts made with investment castings often do not require any further machining, because of the close tolerances that can be achieved.

An investment casting mold is made in foundries by making an impression pattern using wax or foam (lost foam) or some other material that can be melted away from special high pressure dies or tooling. This wax pattern is dipped in refractory ceramic slurry, which coats the wax pattern and forms a skin. After this, the entire pattern is placed in an oven and the wax is melted away. Because the mold is formed around a one-piece pattern (which does not have to be pulled out from the mold as in a traditional sand casting process), very intricate parts and undercuts can be made.

The process uses a one piece mould without joint lines or the need for draft angles, which allows for component shapes that have an aesthetic and uniform finish.  Tolerances of 0.5 % of length are routinely possible, and as low as 0.15 % is possible for small dimensions. Traditionally, investment castings can weigh from a few grams to 35 kg , although the normal size ranges from 200 g to about 8 kg . More often today, higher and higher weight castings are being produced using investment castings techniques. Normal minimum wall thicknesses are about 1 mm to about 0.5 mm for alloys that can be cast easily.

Features: 1 casting shape is complicated, the casting can cast the smallest hole diameter up to 0.5mm, casting the minimum wall thickness of 0.3mm.2 casting surface quality, high size precision, reducing machining.3 suitable for mass production, high production efficiency.4 castings the production of a wide range, widely used in auto parts, machinery parts, engineering accessories, valve pipe production.
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