Product

Lost Wax Investment Casting – Casting Impeller & Valve Body

Lost Wax Investment Casting: Precision in Every Detail

Lost wax investment casting is a highly specialized process that allows for the creation of intricate and high – quality components. We utilize this method to produce casting impellers and valve bodies from a variety of materials, including SCS13A, CB7Cu – 2, carbon steel, stainless steel, and low – temp steel.

Materials Used

SCS13A

SCS13A is a type of stainless steel grade. It offers excellent corrosion resistance, making it suitable for applications where the casting impeller or valve body may be exposed to harsh chemical environments or moisture. This grade also has good mechanical properties, such as sufficient strength and toughness, enabling it to withstand the forces and pressures exerted during operation.

CB7Cu – 2

CB7Cu – 2 is a corrosion – resistant alloy. It combines the benefits of copper and other elements to provide enhanced resistance to corrosion, especially in seawater and certain chemical solutions. This makes it an ideal choice for valve bodies in marine applications or for impellers in systems handling corrosive fluids. Its unique composition also gives it good casting characteristics, ensuring accurate replication of complex shapes during the lost wax investment casting process.

Carbon Steel

Carbon steel is a cost – effective option with good strength properties. Depending on the carbon content, it can offer different levels of hardness and ductility. In the case of casting impellers and valve bodies, carbon steel can be used in applications where corrosion is not a major concern, such as in some industrial piping systems for non – corrosive fluids. It is also relatively easy to machine and weld, allowing for post – casting modifications if required.

Stainless Steel

Stainless steel, with its various grades like 304, 316, etc., is known for its outstanding corrosion resistance and aesthetic appeal. Grades such as 316 are particularly suitable for valve bodies and impellers in the food and beverage, pharmaceutical, and chemical industries, where hygiene and resistance to chemical attack are crucial. Stainless steel also has good heat resistance, which can be beneficial in applications where the components are exposed to elevated temperatures.

Low – Temp Steel

Low – temp steel is designed to maintain its mechanical integrity at extremely low temperatures. It has high toughness and impact resistance in cold conditions, making it perfect for valve bodies and impellers used in industries like the liquefied natural gas (LNG) sector. In these applications, the components need to function reliably in sub – zero environments without suffering from brittleness or cracking.

Products: Casting Impeller and Valve Body

Casting Impeller

The casting impeller is a critical component in pumps and turbines. Through lost wax investment casting, we can create impellers with precise blade geometries, ensuring optimal fluid flow and efficiency. The choice of material, whether it’s SCS13A for corrosion resistance in chemical pumps or low – temp steel for cryogenic applications, is tailored to the specific requirements of the impeller’s operating environment.

Valve Body

Valve bodies are used to control the flow of fluids in piping systems. Lost wax investment casting allows for the production of valve bodies with complex internal passages and smooth surfaces. Materials like CB7Cu – 2 are ideal for marine – based valve bodies due to their corrosion resistance in seawater, while stainless steel grades are preferred for applications where hygiene and chemical resistance are top priorities.

In conclusion, lost wax investment casting using these diverse materials provides a reliable and high – quality solution for manufacturing casting impellers and valve bodies across a wide range of industries. The precision and material – specific properties ensure that the final products meet the demanding requirements of their respective applications.

Our company provides high-quality investment casting services, specializing in the production of precision valve body components. As shown in our facility, we handle high-volume orders for complex parts, from raw casting to finished product. Using advanced investment casting techniques, we manufacture durable valve body parts in various alloys, including stainless steel and bronze. We are an OEM partner for your industrial needs.

Manufacturing Method	Investment Casting(Lost Wax Casting)
Material Standard	GB, ANSI, BS, DIN, JIS, ASTM, ASME, AISI, etc Carbon steel, Low carbon steel, Middle carbon steel, G35, G45, WCB, WCA, WCC, ISO 340-550, etc. Alloy Carbon steel: G25CrMo4, Heat Resistant Steel, etc. Stainless Steel: SUS 304, 304L, 316, 316L, CF8, CF8M, G-X7CrNiNb1189, AS2074 or according to customer specific requirement. Copper, Brass, Bronze
Weight Range	0.01 kgs to 100 kgs
Cast Hole Min. Dia.	Ø2mm
General Casting Tolerance	CT4-CT7
Design Software	UG, Pro-E, Inventor
Dwg Format	STP, STEP, IGS,STP,X_T ,DXF,DWG , Pro/E, PDF, SLDPRT
Mould Manufacturing	Yes
Casting Stimulation	Yes
Ultimate machining tolerance	0.005mm
Quality Control	RT,UT,MT,PT,CMM,SCAN,Chemical and Mechanical Property Testing,Spectrometer,etc
Finish Roughness	Ra1.6-Ra3.2 according to customer requirement
Logo/ID	Silk-screening, Laser Marking, Engrave,Painting
Heat Treatment	Normalization, Annealing, Quenching and Tempering, Case Hardening, Nitriding, Carbon Nitriding, Induction Quenching,etc
Surface Treatment	Shot/sand blast, Polishing, Surface Passivation, Painting , Anodizing,Powder coating, ED- Coating, Chrome Plating, zinc-plate, Dacromat coating, Finish Painting,hot-dip galvanizing, etc

Investment casting, also known as lost wax casting, is a casting method in which a pattern is made of a melt-able material, then coated with several layers of refractory material to form a shell, and the pattern is melted away after high-temperature firing, and then the molten metal is poured into the shell.

Investment casting have high precision and high surface quality, with small machining allowances, which can achieve less or no machining requires. Investment casting can cast complex thin-walled parts with complex shapes (the minimum wall thickness can reach 0.25-0.4mm), and the smallest hole diameter can reach 2.5mm.

The process normal as below:

Drawing Review ->Tooling Designing ->Tooling Manufacturing ->Wax Pattern Making ->Pattern Tree Assembly ->Dipping and Coating ->De-waxing and Firing- Pouring-Knockout ->Grinding ->Heat Treatment -> Machining(if requires) ->Inspection->Delivery

Leesh holdings is the key leading supplier of investment cast parts to both China market and global market.Through many years development, our casting parts now services in railway, automobile and truck, construction machinery, mining machinery, forklift truck, agricultural machinery, ship, petroleum machinery, construction, pump valve, mechanical and electrical, hardware tools, electric power equipment, etc.

Leesh capability

Method: Investment Casting, Lost Wax Casting, Precision Casting

Process Description	Process Control
Process Description	Mass(kgs)	General Tolerance Standard	Casting Tolerance(CT)	Surface Rougness(μm)
Silicon Sol	0.05-50	ISO 8062	CT4-CT6	Ra 3.2～6.3 μm
Water Glass	0.10-100	ISO 8062	CT6-CT8	Ra 6.3～12.5 μm

Material:

Stainless Steel (General SUS304, SUS316, 1.4301), etc.,

Stainless Iron (General 201, 420, 430), etc.,

High/Middle/Low Carbon Steel (A3, Q235, 45), etc.,

Alloy Steel (General 20cr, 20crmo, 20crnimo, 40cr, 40crmo, 40crnimo, 42cr, 42crmo, 42crnimo) etc.,

Brass (H59, H62, H75, H80), etc.,

Red Copper, Bronze, White Copper and other materials.

The above list Is For Reference Only, If You Have Special Needs, Please Contact Customer Service Staff.

Post Casting Process:

Ordinary Polishing, Mirror Polishing, Electrolytic Polishing, Brushed Finishing, Grinding, Heat Treatment, Finishing, Drilling and Tapping,Plating, etc

Surface Treatment:

polishing, powder coating, zinc plating, chrome plating,heat treatment,tumbling polishing, electro-polishing.

We understand your concerns about the quality, we have bought full sets of advanced inspection facilities,Spectrum analyzer, metallographic microscope, tensile testing machine, low temperature impact testing machine, X-ray flaw detection machine, magnetic particle flaw detection machine, ultrasonic flaw detection machine, coordinate measuring instrument, image measuring instrument. The above equipment can ensure the supply of high-standard precision castings to customers, and meet customers’ comprehensive testing requirements for physical and chemical properties of materials, non-destructive defect testing, and high-precision geometric size testing.

https://chinafoundrygroup.com/investment-casting-service/