.

Graphite Molds For Metal Casting

Low Wetting

In order to prevent the casting removed from the mold from sticking, the material should have good adhesion to the solidified metal. This is achieved by low wetting of the mold by liquid metal. Graphite molds for metal casting cannot be wetted by most molten non-ferrous metals and alloys. Ferroalloys such as cast iron form wet graphite due to reaction with carbon, thereby forming carbide Fe. Graphite is also wetted by an alloy containing nickel (more than 6% of nickel), zinc or tin.

High Thermal Conductivity

The heat released when cooling and solidifying the cast metal should be removed from the mold. The amount of heat transferred through the mold in a time unit determines the solidification speed and pull-out speed of the casting. The thermal conductivity of the mold material should be high enough to provide rapid heat dissipation. The thermal conductivity of graphite Molds for Metal Casting is in the range of 560-960 Btu*in/hr*ft2*F (80-140 W/m*K), which is equivalent to the thermal conductivity of metal: aluminum 1540 Btu*in/hr*ft2 *F (222 W/m*K); steel 450 Btu*in/hr*ft2*F (65 W/m*K). The thermal conductivity of graphite depends on the temperature: when the temperature rises to 1300 °F (704 °C), it will drop to half.

Self Lubrication

Graphite is a solid lubricant. The low friction between the mold surface and the solidified metal ensures that the casting is smoothly removed (extracted) without cracks and minimizes the thickness of the defective skin. The special layered crystal structure of graphite determines its self-lubricating properties and provides low friction without increasing the amount of lubricating oil.

Good Mechanical Strength

The mechanical strength (tensile strength, compressive strength, flexural strength) of graphite increases with increasing temperature compared to other materials.

Good Processability

Graphite molds for metal casting are easy to process with graphite. Through milling, turning, sawing, grinding and surface finishing, complex shape molds with tight tolerances are available. Finishing (grinding or polishing) of the inner mold surface is important to reduce the wet and friction of the material. A good outer surface quality ensures a minimum air gap between the mold and the water jacket for better heat transfer.



在线联系供应商

至: Kayson Graphite Industrial Co., Ltd.
Your E-mail:
消息正文:


Send to other suppliers

Other supplier products

Carbon Brushes For Automotive
Carbon Brushes For Automotive Carbon brushes for automotive is an important motor component, conducting current between fixed conductor and moving parts, providing continuous p...
Graphite Molds For Metal Casting
Graphite Molds For Metal Casting Low WettingIn order to prevent the casting removed from the mold from sticking, the material should have good adhesion to the solidified metal. Th...
Washing Machines Carbon Brushes
Washing Machines Carbon Brushes Description: Washing Machine Motor Carbon Brushes are used to conduct electric current from a stationary power supply and moving components. Becau...
Graphite Crucible For Melting Furnace
Graphite Crucible For Melting Furnace Feature of graphite crucible for melting furnace: High density, corrosion resistance, high temperature resistance, fast heat and strong oxidation ...
Graphite Plate
Graphite Plate Product Description:Graphite plate is made from the domestic petroleum coke and widely used in the metallurgy, machinery, electronics and chemical...
供应产品

Same products

Truck & Jeep Radiator
Truck & Jeep Radiator 卖方: 广州驰奔达汽车散热器有限公司 Guangzhou ChiBenDa Automobile Radiator Co., Ltd as the car radiator manufacturers, was establishe...
Radiator Cap
Radiator Cap 卖方: 广州驰奔达汽车散热器有限公司 Guangzhou ChiBenDa Automobile Radiator Co., Ltd as the car radiator supplier, was established in ...
Radiator
Radiator 卖方: 广州驰奔达汽车散热器有限公司 Guangzhou ChiBenDa Automobile Radiator Co., Ltd as the radiator cap manufacturers, was establishe...
Racing Radiator
Racing Radiator 卖方: 广州驰奔达汽车散热器有限公司 Guangzhou ChiBenDa Automobile Radiator Co., Ltd as the car radiator factory, was established in 2...
Heavy Duty Car Radiator
Heavy Duty Car Radiator 卖方: 广州驰奔达汽车散热器有限公司 Guangzhou ChiBenDa Automobile Radiator Co., Ltd as the car radiator manufacturers, was establishe...