Cylinder liner and preparation process thereof

A preparation process and cylinder liner technology, applied in the field of cylinder liner manufacturing, can solve problems such as poor bonding of cylinder liners and aluminum alloys

Active Publication Date: 2020-09-15
ZYNP GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, what the present invention is to solve is the defect that the existing cylinder liner and the aluminum alloy are poorly bonded, and then provides a cylinder liner with a tightly bonded cylinder liner and aluminum alloy and its preparation process

Method used

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  • Cylinder liner and preparation process thereof
  • Cylinder liner and preparation process thereof
  • Cylinder liner and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This embodiment provides a cylinder liner, such as figure 1 As shown, the outer surface of the cylinder liner is randomly distributed with depressions 1 and raised ribs 2 dividing adjacent depressions 1. The raised ribs 2 are enclosed to form depressions 1. The depressions 1 include mesh holes, and the outer There are closed meshes 1-1 accounting for at least 10% of the total meshes on the circular surface, and the remaining meshes are discontinuous meshes 1-2. Preferably, there are closed mesh holes 1-1 on the outer surface of the cylinder liner, accounting for 20-50% of the total mesh holes, and the remaining mesh holes are intermittent mesh holes.

[0058] Further, the mesh diameter of the recessed portion 1 is 0.5-4.0 mm, and the mesh depth is 0.1-0.6 mm. Preferably, as Figure 2-7 shown, the mesh depth is 0.2-0.4mm, more specifically, as image 3 shown, the mesh depth is 428 μm; as Figure 5 shown, the mesh depth is 328 μm; as Figure 7 As shown, the mesh dept...

Embodiment 2

[0064] The present embodiment provides a cylinder liner and a preparation process thereof. The preparation process of the low-circumferential as-cast honeycomb-like or hill-like cylinder liner adopts a centrifugal casting process, which specifically includes the following steps:

[0065] (1) Smelting raw materials: adjust the chemical composition of molten iron, specifically: weigh the specified raw materials in proportion, use an intermediate frequency induction furnace to smelt at 1550 ° C, and season according to the following weight raw material requirements: carbon: 3.3%; sulfur: <0.1% ; Silicon: 2.4%; Phosphorus: ≤0.4%; Manganese: 0.8%; Chromium: 0.25%; Copper: 1%, the balance is iron, and molten iron is obtained;

[0066] (2) tapping inoculation: the above-mentioned molten iron is inoculated by tapping, the tapping temperature is 1500 ° C, the inoculation adopts downstream inoculation, the inoculation amount is 0.5wt%, and the inoculant is silicon strontium zirconium;

...

Embodiment 3

[0073] The present embodiment provides a cylinder liner and a preparation process thereof. The preparation process of the low-circumferential as-cast honeycomb-like or hill-like cylinder liner adopts a centrifugal casting process, which specifically includes the following steps:

[0074] (1) Smelting raw materials: adjust the chemical composition of molten iron, specifically: weigh the specified raw materials in proportion, use an intermediate frequency induction furnace to smelt at 1480 ° C, and season according to the following weight raw material requirements: carbon: 3.5%; sulfur: <0.1% ; Silicon: 2.0%; Phosphorus: ≤0.4%; Manganese: 1.0%; Chromium: 0.1%; Copper: 1.5%, the balance is iron, and molten iron is obtained;

[0075] (2) tapping inoculation: the above-mentioned molten iron is tapped and inoculated, the tapping temperature is 1480 ° C, the inoculation adopts downstream inoculation, the inoculation amount is 0.7wt%, and the inoculant is silicon strontium zirconium; ...

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Abstract

The invention discloses a cylinder liner and a preparation process thereof. On the outer ring surface of the cylinder liner, there are randomly distributed recesses and protruding ribs dividing adjacent recesses, and the protruding ribs enclose a recess portion. The recess portion comprises meshes, the outer ring surface of the cylinder liner has closed meshes with the number of at least 10% of the total number of the meshes, and the remaining meshes are intermittent meshes. Through the special structure of the outer ring surface of the cylinder liner, it can be ensured that the aluminum alloyliquid can easily fill the surface during the casting process of the aluminum alloy liquid. After testing, the combination rate of the cylinder liner provided by the invention and the aluminum alloyliquid reaches 90% or more, and the combination rate of the outer round burr-shaped cylinder liner and the aluminum alloy liquid is less than 50%.

Description

technical field [0001] The invention belongs to the field of cylinder liner manufacture, and in particular relates to a cylinder liner and a preparation process thereof. Background technique [0002] The cylinder liner is a cylindrical part, which is placed in the cylinder barrel of the cylinder block of the machine body, and is pressed and fixed by the cylinder head. The cylinder liner, the piston and the cylinder head together form the combustion chamber, and the piston reciprocates in the inner hole of the cylinder liner. At present, the aluminum alloy embedded gray cast iron cylinder liner is generally used in the car engine. One type of the cylinder liner used is the thread type processed by the outer circle, and the other is the burr shape of the outer circle in the cast state. [0003] The surface of the external threaded cylinder liner is too smooth, and the combination with the aluminum alloy is not tight; the external burr-shaped cylinder liner has too high require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/00B22C23/02B22C3/00C22C37/10C22C37/06C09D1/00
CPCF02F1/004B22C23/02B22C3/00C22C37/10C22C37/06C09D1/00F02F7/0085F02F2200/06
Inventor 赵广华王勇王艳青张高宁
Owner ZYNP GRP
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