Product Introduction

65-45-12 ductile iron lost wax investment casting parts

QT65-45-12 ductile iron QT65-45-12 alloy ductile iron

Material grade: QT65-45-12

Standard: GB/T 1348-2009 ductile iron parts

Steel group: ductile iron

QT65-45-12 is ductile iron (according to user requirements agreed to select other elements: refining alloy iron ball)

Ductile iron is carbon in the form of spherical graphite, its mechanical properties are far better than gray iron and close to steel, it has good casting, cutting and wear resistance, there is a certain degree of elasticity,

Features and Scope of application

It is pearlescent ductile iron with high strength, wear resistance and low toughness (low plasticity). Suitable for high strength requirements of parts, such as diesel and gasoline engine crankshaft, camshaft, part of the grinder, milling machine, lathe spindle, ball mill shaft, small turbine spindle.

Mechanical properties:

Tensile strength σb (MPa):≥700

Conditional yield strength σ0.2 (MPa):≥420

Elongation δ (%):≥2

Hardness :225~305HB

Heat treatment specification and metallographic structure:

Heat treatment specification :(determined by the supplier, the following is the heat treatment specification of a sample, for reference) 800℃, normalizing

Metallographic structure: graphite + pearlite + a small amount of ferrite

Grey cast iron. The carbon content is high (2.7% ~ 4.0%), the carbon mainly exists in the form of flake graphite, and the fracture is gray.

Gray iron for short. Low melting point (1145 ~ 1250℃), small shrinkage during solidification, compressive strength and hardness close to carbon steel,

Good shock absorption. Used to manufacture machine tool bed, cylinder, box and other structural parts.

White cast iron. The content of carbon and silicon is low, the carbon mainly exists in the form of cementite, and the fracture is silver-white. Large shrinkage during solidification,

Easy to produce shrinkage holes and cracks. High hardness, brittleness, can not withstand the impact load. It is often used as a blank for malleable cast iron and to make wear-resistant parts.

Malleable cast iron. Obtained from white cast iron after annealing treatment, the graphite is distributed in clumps and flocculation, referred to as tough iron. Its tissue properties are uniform.

Wear resistance, good plasticity and toughness. It is used to manufacture parts with complex shapes that can withstand strong dynamic loads.

Ductile iron. Gray cast iron molten iron is obtained by spheroidizing treatment, and the precipitated graphite is spherical, referred to as ductile iron.

Compared with ordinary gray cast iron, it has higher strength, better toughness and plasticity. Used in the manufacture of internal combustion engines, auto parts and agricultural machinery.

Vermicular graphite cast iron. The graphite precipitated from gray cast iron molten iron was worm-like. Mechanical properties are similar to ductile iron,

Casting properties between gray cast iron and ductile cast iron. Used to make parts for cars.

Alloy cast iron. Ordinary cast iron is obtained by adding appropriate alloying elements (such as silicon, manganese, phosphorus, nickel, chromium, molybdenum, copper, aluminum, boron, vanadium, tin, etc.).

Alloying elements make the matrix structure of cast iron change, so that it has the corresponding heat resistance, wear resistance, corrosion resistance, low temperature resistance or no magnetic properties. Used in the manufacture of mining, chemical machinery and instruments, instruments and other parts.

Features: Complete product specifications, preferential prices, intact packaging, pure copper, good straightness, large inventory, can provide material certification and SGS report.

Zhongwei Precision has the following services

Detection Systems

Copper Silica Sol Investment Casting

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