Payment & Shipping Terms:
|Material:||Ductile Iron GGG40||Process:||Green Sand Casting Process|
|Machining:||CNC Machining||Surface:||Shot Blasting|
|Used For:||Tractor||Packing:||Plywood Crate|
nodular cast iron,
spheroidal cast iron
Wheel Castings For Tractor Cast Ductile Iron Components Dynamic Balance Machining Parts
Product Description and Process
1. Wheel Castings For Tractor Cast Ductile Iron Components Dynamic Balance Machining Parts
2. Production process:
|green sand molding process|
|precoated sand molding process|
|resin sand molding process|
3. we can produce iron castings from 50 gram to 2000 kilograms
4. making sand molds by:
|shell molding machines|
|automatic molding production line|
5. Machining process: CNC machine, machining center, lathe, mill machine, drill machine, dynamic balancing machine etc.
6. Surface treatment process: paint coating, electrophoretic coating, electrogalvanizing coating, black oxide coating, phosphate coating, powder coating, etc.
Product Material and Uses
1. Normally produce with gray iron HT200, HT250, ductile iron 65-45-12, 60-40-18, 80-55-06, 80-60-03, etc.
2. The ductile iron casting products are widely used for Auto-cars, trains, trucks, vehicle components, mining machinery components, agricultural machinery parts, textile machinery parts, construction machinery parts, etc.
Nodular cast iron identification
Nodular cast iron otherwise popularly known as ductile cast iron varies from the rest of the cast iron varieties with its nodular graphite spherical structures. These graphite spheres differ in their size, quantity and the arrangement pattern. The main difference is the spherical shape of these graphite molecules unlike the graphite flakes found in grey iron. Ductile iron or nodular cast iron differs in its chemical composition due to the presence of these graphite inclusions formed by the influence of magnesium, cerium and other particles. Therefore nodular cast iron or ductile iron has more tensile strength, high elasticity and toughness than any other cast iron types. Since it has a high stiffness equal to that of a cast steel, it serves as a suitable choice for the manufacturing of parts like propeller shafts.
Nodular cast iron is produced by melting the metal initially. This molten metal is then inoculated with smaller quantities of magnesium and cerium. The free carbons present in the final product form a surface of the round graphite nodules or spheres which are surrounded by ferrite. This adds to the elasticity of the metal.
2. Mechanical properties:
The mechanical properties of nodular cast iron are greatly influenced by the arrangement patterns of the graphite nodules. This determines the various grades of ductile iron offering a wide range of choice for various purposes. The various mechanical properties of nodular cast iron include toughness, tensile strength, elasticity, ductility, hardness and fatigue strength.
3. Physical properties:
The various physical properties of a nodular cast iron include density, thermal expansion, conductivity, magnetic properties, electrical properties and heat capacity. In comparison to grey iron, nodular cast iron has a very high tensile strength up to 90k psi. It is also very strong than grey iron and has good fracture resistance. It has good resistance to any pressure than grey iron.
4. Chemical composition:
Nodular cast iron has a chemical composition of several elements including Carbon, Silicon, Manganese, Phosphorous, Sulfur and Magnesium. Carbon is present up to 3.8%, Silicon is up to 3.2, Magnesium up to 0.06. Manganese less than 0.5, Phosphorous less than 0.08, Sulfur less than 0.08 and copper less than 0.40%.
Common Ductile Iron Grades
While there are many different ductile iron specifications, foundries routinely offer 3 common grades;
|Physical and Mechanical Properties||ASTM A536, Grade 60-40-18||ASTM A536, Grade 65-45-12||ASTM A536, Grade 80-55-06|
|Tensile Strength, min, psi||60,000||65,000||80,000|
|Tensile Strength, min, MPa||414||448||552|
|Yield Strength, min, psi||40,000||45,000||55,000|
|Yield Strength, min, MPa||276||310||379|
|Elongation in 2 in. or 50 mm, min %||18||12||6|
|Melting Temperature (Degrees F)||2,100 – 2,190||2,100 – 2,190||2,100 – 2,190|
|Melting Temperature (Degrees C)||1,150 - 1,200||1,150 - 1,200||1,150 - 1,200|
|Compressive Strength Ksi||429||429||429|
|Compressive Strength MPa||2960||2960||2960|
Shell Molding Castings Process
Probably the earliest most automated and most rapid of mold and core making processes was the heat-curing technique known as the Shell Molding process.
Resin-bounded silica sand is placed onto a heated pattern for a predetermined time. Ejector pins enable the mold to be released from the pattern and the entire cycle is completed in seconds depending upon the shell thickness. The two halves of the mold, suitably cored, are clamped together prior to the pouring of the metal.
Shell molds may be stored for long periods if desired. Because of pattern cost this method is best suitable for volume production.
Shell Molding molds may be stored for long time. Good casting detail, appearance and dimensional accuracy. Sand molds is light in weight.
High pattern cost, higher material cost compared to green sand molding. Not suitable for big castings.
Contact Person: Mr. James Wang
Tel: +86 13213152686