Stainless Steel Casting

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Lost Wax Casting Foundry with Stainless Steel

Material: Stainless Steel
Process: Lost Wax Casting with Silica Sol and Water Glass
Weight: 1.90 KG
Application: Connector

The basic feature of investment casting is that a meltable disposable mold is used when making the shell. Because there is no need to draw the mold, the shell is integral without a parting surface, and the shell is made of refractory materials.

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Description

Lost Wax Casting Steel Foundry

Lost wax casting can produce complex-shaped castings, with a minimum wall thickness of 0.3 mm and a minimum diameter of the casting hole of 0.5 mm. Sometimes in production, some parts composed of several parts can be combined into a whole by changing the structure and directly formed by investment casting. This can save processing man-hours and metal material consumption, and make the part structure more reasonable.

Lost wax casting molds are currently generally used in a shell made of multilayer refractory materials. After the module is dipped and coated with refractory coating, sprinkle the granular refractory material, and then dry and harden, and repeat this process many times until the refractory material layer reaches the required thickness.

▶ Raw Materials Available for Investment Casting (Lost Wax Casting Process)

• Carbon Steel: AISI 1020 - AISI 1060,
• Steel Alloys: ZG20SiMn, ZG30SiMn, ZG30CrMo, ZG35CrMo, ZG35SiMn, ZG35CrMnSi, ZG40Mn, ZG40Cr, ZG42Cr, ZG42CrMo...etc on request.
• Stainless Steel: AISI 304, AISI 304L, AISI 316, AISI 316L and other stainless steel grade.
• Brass & Copper.
• Other Materials and Standards on request

▶ Capabilities of Investment Casting

• Max Size: 1,000 mm × 800 mm × 500 mm
• Weight Range: 0.5 kg - 100 kg
• Annual Capacity: 2,000 tons
• Bond Materials for Shell Building: Silica Sol, Water Glass and their mixtures.
• Tolerances: On Request.

▶ Main Production Procedure

• Patterns & Tooling Design → Metal Die Making → Wax Injection → Slurry Assembly → Shell Building → De-Waxing → Chemical Composition Analysis → Melting & Pouring → Cleaning, Grinding & Shot Blasting → Post Processing or Packing for Shipment

▶ Inspecting Lost Wax Castings

• Spectrographic and manual quantitative analysis
• Metallographic analysis
• Brinell, Rockwell and Vickers hardness inspection
• Mechanical property analysis
• Low and normal temperature impact testing
• Cleanliness inspection
• UT, MT and RT inspection

Silica sol binder is an aqueous solution of silicic acid, also known as silica sol. Its price is 1/3~1/2 lower than that of ethyl silicate. The quality of castings produced by using silica sol as a binder is higher than that of water glass. The binding agent has been greatly improved. Silica sol has good stability and can be stored for a long time. It does not require special hardeners when making shells.

The high temperature strength of the shell of solica sol is better than that of ethyl silicate shells, but the silica sol has poor wettability to the investment and takes longer to harden. The main processes of shell making include module degreasing, coating and sanding, drying and hardening, demoulding and roasting.