Material: Cast Alloy Steel, Stainless Steel, Carbon Steel Process: Lost Wax Investment Casting Weight: 1.60 kg Application: Industrial Machineries
The investment casting (lost wax casting) could be used for casting the following materials: Alloy Steel, Stainless Steel, Low Carbon Steel, Medium Carbon Steel and High Carbon Steel etc. OEM services and CNC machining services are available.
During the investment casting, a wax pattern, or cluster of patterns, is dipped into ceramic material several times to build a thick shell and then form the casting molds. De-wax process is then followed by the shell dry process. The wax-less ceramic shell is then produced. Molten metal is then poured into the ceramic shell cavities or cluster, and once solid and cooled, the ceramic shell is broken off to reveal the final cast metal object. Precision investment castings can achieve exceptional accuracy for both small and large casting parts in a wide range of materials.
Investment Casting Technical Data at RMC Foundry
R & D
Software: Solidworks, CAD, Procast, Pro-e
Lead Time for Development and Samples: 25 to 35 days
Ferritic Stainless Steel, Martensitic Stainless Steel, Austenitic stainless steel, Precipitation Hardening Stainless Steel, Duplex Stainless Steel
Carbon Steel, Alloy Steel, Tool Steel, Heat Resistant Steel,
Nickle-base Alloy, Aluminium Alloy, Copper-base Alloy, Cobalt-base Alloy
Standard of Specifications
ISO, GB, ASTM, SAE, GOST EN, DIN, JIS, BS
Material for Shell Building
Silica Sol (Precipitated Silica )
Water Glass (Sodium Silicate)
Mixtures of Silica Sol and Water Glass
Piece Weight: 2 gram to 200 kilo gram
Max Dimension: 1,000 mm for Diameter or Length
Min Wall Thickness: 1.5 mm
Casting Roughness: Ra 3.2-6.4, Machining Roughness: Ra 1.6
Tolerance of Casting: ISO 8062 CT4 ~ CT7; VDG P690, D1/CT5-7
Tolerance of Machining: ISO 2768-mk/IT6
Inner Core: Ceramic Core, Urea Core, Water Soluble Wax Core
Normalizing, Tempering, Quenching, Annealing, Solution, Carburization.
Polishing, Sand / Shot Blasting, Zinc Plating, Nickel Plating, Oxidation Treatment, Phosphating, Powder Painting, Geormet, Anodizing
CMM, Vernier Caliper, Inside Caliper. Depth Gage, Height Gage, Go/No go Gage, Special Fixtures
Chemical Compostion Analysis (20 chemical elements), Cleanliness Inspection, X-ray Radiographic Inspection, Carbon-Sulfur Analyser
Dynamic Balancing, Static Blancing, Mechanical Properties (Hardness, Yield Strength, Tensile Strength), Elongation
More than 250 tons per month, more than 3,000 tons annually.
The investment casting parts could be made by silica sol process and water glass process at RMC. Our rich experience could help our colleagues produce the good parts with competitive costs. As a precision casting process, the shell making is a very critical process during investment casting. The quality of the shell is directly related to the roughness and dimensional tolerance of the final casting. Therefore, it is an important task for the investment casting foundry to choose a suitable manufacturing method for the mold shell. According to different adhesives, investment casting molds can be divided into water glass adhesive shells, silica sol adhesive shells, ethyl silicate adhesive shells and ethyl silicate-silica sol composite shells. These modeling methods are the most commonly used methods in investment casting.
Water Glass Shell
The investment casting produced by the water glass shell casting has high surface roughness, low dimensional accuracy, short shell-making cycle and low price. This process is widely used in casting carbon steel, low alloy steel, aluminum alloy and copper alloy.
Silica Sol Shell
The silica sol investment casting has low roughness, high dimensional accuracy, and long shell-making cycle. This process is widely used in high-temperature heat-resistant alloy castings, heat-resistant steel castings, stainless steel castings, carbon steel castings, low alloy castings, aluminum alloy castings and copper alloy castings.
Ethyl Silicate Shell
In investment casting, castings made by using ethyl silicate as a binder to make the shell have low surface roughness, high dimensional accuracy, and a long shell-making cycle. This process is widely used in heat-resistant alloy castings, heat-resistant steel castings, stainless steel castings, carbon steel castings, low alloy castings, aluminum alloy castings and copper alloy castings.
▶ Raw Materials Available for Lost Wax Investment Casting
|Investment Casting Material Capabilities at RMC Foundry|
|Martensitic Stainless Steel||100 Series: ZG1Cr13, ZG2Cr13 and more|
|Ferritic stainless steel||200 Series: ZG1Cr17, ZG1Cr19Mo2 and more|
|Austenitic stainless steel||300 Series: 304, 304L, CF3, CF3M, CF8M, CF8, 1.4304, 1.4401...etc.|
|Duplex Stainless Steel||400 Series: 1.4460, 1.4462, 1.4468, 1.4469, 1.4517, 1.4770; 2205, 2507|
|Precipitation Hardening Stainless Steel||500 Series: 17-4PH, 15-5PH, CB7Cu-1; 1.4502|
|Carbon Steel||C20, C25, C30, C45; A216 WCA, A216 WCB,|
|Low Alloy Steel||IC 4140, IC 8620, 16MnCr5, 42CrMo4|
|Super Alloy and Special Alloys||Heat Resistant Steel, Wear Resistant Steel, Tool Steel,|
|Aluminum Alloy||A355, A356, A360, A413|
|Copper Alloy||Brass, Bronze. C21000, C23000, C27000, C34500, C37710, C86500, C87600, C87400, C87800, C52100, C51100|
|RMC can meet material specification acc. to ASTM, SAE, AISI, ACI, DIN, EN, ISO, GB standards.|
Wax patterns during the lost wax casting process: