Graphite Dies Used in Continues Casting for Copper and Brass

• Type: Graphtie Parts
• Composition: Carbon
• Carbon Content: High-Carbon
• Grade: Industrial Grade
• Forming Way: Isostatic Graphite
• Density: 1.85 g/cm3
• Model NO.: HTJJQ003
• Specific Resistance: No More Than 8.5
• Compressive Strenght: 34 MPa Min
• Shape: Cuistomized
• Material: High Purity Graphite
• Transport Package: Wooden Case
• Specification: Customized
• Origin: Hebei, China
• Production Capacity: 500000 Piece/Pieces Per Month

Product Description

 

Overview Of Continuous Casting

Continuous cast shapes are produced by introducing molten metal into a vertical or horizontal mold that has the ability for rapidly chilling the metal to the point of solidification. The rapid chilling in the mold ensures a fine, uniform grain structure in the solidified metal with higher physical properties than sand castings. Once solidified, the cast shaped bar is cut to the desired length.
The most common continuous casting shapes produced are tubes and solids. However, other continuous casting shapes such as square, rectangular, hexagonal, and many other irregular shapes can also be produced to match a desired finished part profile.
 

 

Due to its ability to resist wetting by molten metals, graphite is used as a mold material for strip/plates dies, tube dies, wire dies and other molds used in continuous casting processes for copper and copper alloys (brass, bronze, and nickel silver), aluminum alloys, cast iron, precious metals, and a variety of other metals.
Graphite can be used with different continuous casting methods (horizontal/vertical) and can be produced in a variety of ingot shapes (including plates, strips, pipes, rods, wire, and contoured shapes).

Features of our graphite molds/dies for continuous casting

• Excellent thermal durability
• Good thermal conductivity
• Resists wetting by molten metals
• Complex shapes can be processed
• Reduces metal sleeve weight
• Various surface modifications and treatments enable a variety of applications

why graphite is ideal for continuous casting?

1.Durability: Low Coefficient of Thermal Expansion
The coefficient of thermal expansion is an important factor that determines why graphite is ideal as a mold material. The casting mold is a medium with very un-uniform temperatures, from hot inside due to the molten material, to cold on the outside due to the cooling process applied to it. The low coefficient of thermal expansion that graphite exhibits allows the mold to function without deforming or cracking.

2.Self Lubrication

Another important factor why graphite materials are ideal for use in continuous casting is self-lubrication. Graphite is a solid lubricant that allows for low friction between the mold and the cast material. If what you were molding in a cast were muffins, you would liberally grease the muffin pan with butter or oil so that when you pull the muffins out of the oven, you could easily extract them from the pan to cool. Graphite works similarly to the grease in this comparison, allowing for smooth extraction of the casting.

3.Strength for A Long Life

There are various factors determining the lifetime of a graphite mold. From the composition of the casted materials, to the casting temperature, to the cooling rates - all of these affect the life of the graphite mold. Another benefit of graphite molds is that they can be re-machined to smooth surfaces and then be used again.
The specific graphite grade used in a mold is also determined by a multitude of factors. The main factor is the composition of the alloy to be cast. For example, for a gray iron, or a high-nickel alloy, a graphite resistant to wear is required, while for brass, a relatively dense graphite with enough open porosity to allow zinc to evaporate would be a better choice. 
Designing graphite molds for continuous casting requires consideration of all these factors and applying them to your specific application.

 

 

Our graphite dies for continuous casting are ideal for casting precious metals, copper alloy and casting-iron products. Graphite is used in the metal-casting process and allows the metal processing to be monitored continuously, melting from the liquid state to the solid state, to produce wires, tubes, bars and strips or plates.

During casting, temperature is increased to decrease the tensile and yield strength of the metal alloys being cast. The temperature at which metals melt varies depending on the type of metal. Factors that influence casting are the temperature of the alloy being cast and the temperature of the crucible. Graphite crucibles are exceptionally capable of providing the proper vessel for casting due to their high resistance to the effects of increases in temperature, regardless of the type of metal alloy.

 

Continuous casting is a casting process for production of high-quality ferrous and non-ferrous alloys semi-finished products such as tubes, wires, bars and strips. During continuous casting, liquid metal is continuously poured into a bottomless cooled die. Inside the die, the metal stream shell solidifies, with the core still be liquid, then will be drawn off upwards or downwards.

Our graphite dies and molds have excellent thermal conductivity, chemical and thermal resistance, and high strength.
 

Advantages:

•Good thermal Conductivity

•High Strength

•High thermal resistance

•High chemical resistance

•Excellent thermal shock resistance

•Good lubrication properties

•Low thermal expansion

Advanced Equipments: 
 

Graphtie Material Property: 

Property (Typical Value)	TSK	GSK	Unit
Apparent Density	≥1.68	≥1.72	g/cm^3
Max Grain Size	≤2	≤0.8	mm
Specific Electrical Resistivity	8-10	≤8.5	μΩm
Flexural Strength	≥12.5	≥15	Mpa
Compressive Strength	≥28	≥35	Mpa
Porosity	≤24	≤20	%
Ash value	≤0.3	≤0.3	%

 

Property (Typical Value)	HTG-4	HTG-5	Unit
Apparent Density	≥1.78	≥1.85	g/cm^3
Max Grain Size	≤43	≤43	µm
Ash value	≤500	≤500	ppm
Specific Electrical Resistivity	≤12	≤10	μΩm
Flexural Strength	≥35	≥40	Mpa
Compressive Strength	≥60	≥70	Mpa
Shore Hardness	≥40	≥45	HSD
Thermal Expansion (room temperature to 600ºC)	≤4.5	≤4.4	10-6/ºC

 

Property (Typical Value)	HTD-5	HTD-6	HTD-7	HTD-8	HTD-9	Unit
Apparent Density	1.85	1.90	1.82	1.90	1.82	g/cm^3
Max Grain Size	13-15	8-10	8-10	8-10		µm
Ash Content	≤500	≤500	≤500	≤500	≤500	ppm
Purified ASH Content	50	50	50	50	50	ppm
Specific Electrical Resistivity	8-10	8-9	11-13	11-13	11-13	μΩm
Flexural Strength	46	55	51	60	59	Mpa
Compressive Strength	85	95	115	135	121	Mpa
Shore Hardness	48	53	65	70	70	HSD
Thermal Expansion (room temperature to 600ºC)	4.75	4.8	5.8	5.85	5.85	10-6/ºC

Our Services:

Efficiency: Your einquiry will be replied with 24 hours 

Fast Delivery: Our produciton capability and enough mateiral stocks will make sure fast devevery
Customization: We provided OEM services based on your design and drawings

Design Service: Our professional and experienced enigneers team can disign for you, if you need
Quality and Price: We offer you high quality graphite products with the most competitive price

After-sales Services: Tracking service for feedbacks of our graphite products, and we will be responsilbe for quality problem.  

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