Centrifugal casting process of high-performance engine alloy cylinder sleeve

A technology of centrifugal casting and engine, which is applied in the field of casting, can solve the problems that the precision of castings cannot be effectively guaranteed, the hardness and toughness are not enough, and the casting process is cumbersome, so as to achieve high raw material utilization, improve production efficiency, and optimize mold design.

Inactive Publication Date: 2015-07-01
QINGDAO YUGUANG PRECISION CASTING FACTORY
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Problems solved by technology

In the current engine alloy cylinder liner casting process, the hardness and toughness of the finished cylinder liner castings are far from enough, and further processing is required. Not only the casting process is cumbersome, which affects the production capacity, but the accuracy of the castings cannot be effectively guaranteed, and the scrap rate is high. high

Method used

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Embodiment

[0017] The high-performance engine alloy cylinder liner centrifugal casting process of the present embodiment comprises the following steps:

[0018] (1) Optimizing the design of the machining allowance of the blank to improve the uniformity of the section structure of the formed part. The machining allowance of the outer circle of the blank is 3 mm on one side, and the inner cavity allowance is 3.5 mm on one side;

[0019] (2) On the basis of meeting the basic chemical composition of the material in terms of weight percentage: C 3.5, Si 2.2, Mn 0.8, P 0.4, S 0.12, Cr 0.4, Cu 0.3, and the balance is iron, add 0.15 wt.% tin alloying;

[0020] (3) Inoculation: the total inoculation amount is controlled at 0.5wt.%, among which, the inoculation amount of ladle inoculation is equal to 0.1%;

[0021] (4) When pouring, the thickness of the coating in the inner cavity of the mold is controlled at 1.2 mm;

[0022] (5) The interval between pouring and water release is 20 seconds; the ...

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Abstract

The invention discloses a centrifugal casting process of a high-performance engine alloy cylinder sleeve; the radiating condition in the condensation of a casting melt is improved through optimizing the mold design; tin is added in a traditional cylinder jacket material for alloying; and meanwhile, the total inoculation quantity is reduced, and ladles are properly added for inoculating, so that graphite is more refined, the pearlite stability is improved, and the wear resistance of the cylinder jacket material is improved.

Description

[0001] technical field [0002] The invention belongs to the technical field of casting, and in particular relates to a centrifugal casting process of a high-performance engine alloy cylinder liner. [0003] Background technique [0004] The casting process of the engine alloy cylinder liner at least includes the steps of designing blank machining allowance, inoculation, pouring and so on. In the current engine alloy cylinder liner casting process, the hardness and toughness of the finished cylinder liner castings are far from enough, and further processing is required. Not only the casting process is cumbersome, which affects the production capacity, but the accuracy of the castings cannot be effectively guaranteed, and the scrap rate is high. high. [0005] Contents of the invention [0006] In order to overcome the above-mentioned technical problems existing in the prior art, the object of the present invention is to provide a high-performance engine alloy cylind...

Claims

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Application Information

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IPC IPC(8): B22D13/00C22C37/10
CPCB22D13/00C22C37/06C22C37/10
Inventor 陈玉光
Owner QINGDAO YUGUANG PRECISION CASTING FACTORY
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