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As-cast malleable cast iron cylinder sleeve produced through centrifugal casting and production process of as-cast malleable cast iron cylinder sleeve

A technology of centrifugal casting and production process, applied in the field of cylinder liner, can solve the problems of inability to meet the production requirements of energy saving and environmental protection cylinder liner, high scrap rate, complex casting process, etc., and achieves low cost, short production cycle, elongation and resistance. The effect of high tensile strength

Active Publication Date: 2016-03-16
ZYNP GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the material of small-bore cylinder liners is mostly ordinary gray cast iron or alloy cast iron. This type of cylinder liner mainly relies on reducing carbon equivalent and alloy strengthening to meet the requirements of strength and wear resistance. The casting process is complicated and the scrap rate is high.
Therefore, ordinary gray cast iron or alloy cast iron can no longer meet the production requirements of energy-saving and environmentally friendly cylinder liners

Method used

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  • As-cast malleable cast iron cylinder sleeve produced through centrifugal casting and production process of as-cast malleable cast iron cylinder sleeve
  • As-cast malleable cast iron cylinder sleeve produced through centrifugal casting and production process of as-cast malleable cast iron cylinder sleeve
  • As-cast malleable cast iron cylinder sleeve produced through centrifugal casting and production process of as-cast malleable cast iron cylinder sleeve

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Embodiment 1

[0018] A kind of as-cast malleable cast iron cylinder liner produced by centrifugal casting, in terms of weight percentage, its material chemical composition is:

[0019]

[0020] The production method of the as-cast malleable cast iron cylinder liner produced by above-mentioned centrifugal casting comprises the following steps:

[0021] 1) Ingredients and smelting: smelting in a 500kg intermediate frequency induction furnace, weighing 0.5% of the total mass of raw materials except Ce, Bi and Al and smelting raw materials in proportion to silicon carbide (carbon content 40% ~ 45%, silicon content 55% ~ 60%, particle size 1 ~ 2mm) to prepare raw materials, and then melted into molten iron in a 500kg intermediate frequency induction furnace, the melting temperature is 1470 ° C; A mixture of Ce and Bi (silicon carbide particle size 0.5-1mm);

[0022] 2) Casting: Cylinder liner castings are produced by water-cooled metal-type wet paint centrifugal casting process. The casting ...

Embodiment 2

[0026] A kind of as-cast malleable cast iron cylinder liner produced by centrifugal casting, in terms of weight percentage, its material chemical composition is:

[0027]

[0028] The production method of the as-cast malleable cast iron cylinder liner produced by above-mentioned centrifugal casting, it comprises the steps:

[0029] 1) Ingredients and smelting: smelting in a 500kg intermediate frequency induction furnace, weighing 3% of the total mass of raw materials except Ce, Bi and Al and smelting raw materials in proportion to silicon carbide (carbon content 40% to 45%, silicon content 55% to 60%, particle size 1-2mm) to prepare raw materials, and then smelt it into molten iron in a 500kg medium-frequency induction furnace at a melting temperature of 1520°C; Mixture with Bi (silicon carbide particle size 0.5 ~ 1mm);

[0030] 2) Casting: Cylinder liner castings are produced by water-cooled metal type wet paint centrifugal casting process, the casting temperature is 1460...

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Abstract

The invention relates to an as-cast malleable cast iron cylinder sleeve produced through centrifugal casting and a production process of the as-cast malleable cast iron cylinder sleeve. The as-cast malleable cast iron cylinder sleeve comprises the following chemical compositions in percent by weight: 2.7-3.2 percent of C, 1.8-2.2 percent of Si, more than 0 percent and less than 0.1 percent of P, more than 0.03 percent and less than 0.06 percent of S, 0.3-0.8 percent of Mn, 0.005-0.01 percent of B, 1.5-1.7 percent of Cu, 0.06-0.08 percent of Bi, 0.06-0.08 percent of rare earth, 0.002-0.004 percent of Al, and the balance of Fe. The metallographic phases of the cylinder sleeve adopt bulk graphite, more than 95% of pearlite and a small amount of ferrite. The cylinder sleeve is 500 MPa above in tensile strength, is larger than 230 HB in hardness, is larger than 2.0% in elongation, and has the advantages of short production cycle, low cost, high elongation, high tensile strength, and good abrasion resistance.

Description

technical field [0001] The invention belongs to the technical field of cylinder liners, and in particular relates to an as-cast malleable cast iron cylinder liner produced by centrifugal casting and a production process thereof. Background technique [0002] At present, the small-bore cylinder liner is mostly made of ordinary gray cast iron or alloy cast iron. This type of cylinder liner mainly relies on reducing carbon equivalent and alloy strengthening to meet the requirements of strength and wear resistance. The casting process is complicated and the scrap rate is high. Therefore, ordinary gray cast iron or alloy cast iron can no longer meet the production requirements of energy-saving and environment-friendly cylinder liners. Contents of the invention [0003] The purpose of the present invention is to provide an as-cast malleable cast iron cylinder liner produced by centrifugal casting and its production process. The cylinder liner has high elongation, tensile strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08B22D13/04C21D9/00
CPCB22D13/04C21D9/0068C21D2211/005C21D2211/006C21D2211/009C22C33/08C22C37/10
Inventor 张亮亮刘栋赵广华王勇
Owner ZYNP GRP
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