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Ferrite matrix ductile cast iron, fabrication method and shaft made of ductile cast iron

A technology of ductile cast iron and its manufacturing method, which is applied in the field of casting and can solve problems such as insufficient strength

Inactive Publication Date: 2010-07-07
ZHEJIANG JIALI WIND POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, although the plasticity and toughness can meet the requirements, the strength is not enough to meet the above requirements

Method used

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  • Ferrite matrix ductile cast iron, fabrication method and shaft made of ductile cast iron

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Experimental program
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Effect test

Embodiment 1

[0032] Ferritic matrix ductile iron is composed of the following components by mass: 3.3% C, 2.3% Si, 0.8% Ni, 0.3% Mn, 0.05% P, 0.02% S, 0.03% Mg , 0.02% RE, the rest is Fe and 0.1% impurity elements.

[0033] The mechanical properties of the ductile iron with this composition, the D-type attached casting test block reach: tensile strength 486Mpa, yield strength 360Mpa, elongation 23%, impact energy 16.3J (room temperature, average value), with high strength and high plasticity And high toughness excellent mechanical properties.

Embodiment 2

[0035] Ferritic matrix ductile iron is composed of the following components by mass: 3.4% C, 2.4% Si, 1.0% Ni, 0.04% P, 0.02% S, 0.04% Mg, 0.03% RE , and the rest are Fe and 0.09% impurity elements.

[0036] The ductile iron that the present invention obtains, the mechanical property of its D type attached casting test piece reaches: tensile strength 485Mpa, yield strength 361Mpa, elongation 22%, impact energy 15.7J (room temperature, average value), have high strength, Excellent mechanical properties of high plasticity and high toughness.

Embodiment 3

[0038] Ferritic matrix ductile iron is composed of the following components by mass: 3.5% C, 2.5% Si, 0.9% Ni, 0.2% Mn, 0.015% S, 0.05% Mg, 0.04% RE , and the rest are Fe and 0.07% impurity elements.

[0039] The ductile iron that the present invention obtains, the mechanical property of its D type attached casting test block reaches: tensile strength 488Mpa, yield strength 366Mpa, elongation 20%, impact energy 15.5J (room temperature, average value), have high strength, Excellent mechanical properties of high plasticity and high toughness.

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Abstract

The invention discloses a ferrite matrix ductile cast iron, belonging to the casting technical field. The existing ferrite ductile cast iron is hard to meet the demand for mechanical properties of high strength, high plasticity and high toughness. The ferrite matrix ductile cast iron of the invention is composed of the following mass portions of components: 3.3-3.7 percent of C, 2.3-2.7 percent of Si, 0.8-1.5 percent of Ni, less than or equal to 0.3 percent of Mn, less than or equal to 0.05 percent of P, less than or equal to 0.02 percent of S, 0.03-0.06 percent of Mg, 0.02-0.04 percent of RE, less than or equal to 0.1 percent of impurity, and the rest percent of Fe. The mechanical properties of the D-type attached test block of the ductile cast iron of the invention can reach 485MPa of tensile strength, 360MPa of yield strength, 20 percent of elongation, and 15J of impact work (room temperature). The ferrite matrix ductile cast iron of the invention has excellent mechanical properties of high strength, high plasticity and high toughness, applicable to casting of mechanical parts such as shafts.

Description

technical field [0001] The invention belongs to the technical field of casting, and specifically relates to a high-strength, high-plasticity, high-toughness ferrite matrix nodular cast iron and a shaft made of the cast iron. Background technique [0002] Ductile iron is a commonly used engineering material, widely used in automobile manufacturing, engineering machinery, machine tools and other industries. For engineering materials, mechanical properties are the most important properties. The mechanical properties of materials refer to the mechanical characteristics of materials when they are subjected to various external loads (such as tension, compression, bending, torsion, impact, alternating stress, etc.) under different environments (temperature, medium, humidity). There are many kinds of mechanical properties of materials, commonly used are strength, elasticity, plasticity and toughness and so on. In the practical application of ductile iron materials, the tensile str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/04F16C3/00
Inventor 苟华强
Owner ZHEJIANG JIALI WIND POWER TECH