Method for thermally spraying Babbitt-metal coating on surface of crosshead

A Babbitt alloy and crosshead technology, which is applied in the field of thermal spraying Babbitt alloy coating on the surface of the crosshead, can solve the problems of complex and bulky structure, oxide inclusions, etc.

Inactive Publication Date: 2013-04-03
上海大豪纳米材料喷涂有限公司
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  • Abstract
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Problems solved by technology

But the structure is complex and heavy...

Method used

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Embodiment 1

[0023] A method for thermally spraying a babbitt metal coating on the surface of a crosshead, the method comprising the following steps:

[0024] Step (1) Decontaminate the surface of the crosshead substrate, and wipe it with an organic solvent.

[0025] Step (2) Perform sandblasting and texturing treatment on the decontaminated crosshead substrate, using alumina corundum sand with a particle size of 0.5mm~1.5mm, and blasting air pressure of 0.6~0.7Mpa. The roughness after sandblasting is controlled at 50~120um.

[0026] Step (3) Thermal spray nickel-aluminum primer on the textured surface, use arc spraying equipment to prime the textured stainless steel surface with nickel-aluminum alloy wire, spraying air pressure 0.6Mpa, the thickness of the primer is 0.03~0.08mm .

[0027] Step (4) Thermally spray the babbitt alloy working layer on the primer layer, and use flame wire spray equipment to spray the babbitt alloy coating on the primer layer, with a coating thickness of 1.2 ...

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Abstract

The invention relates to a method for thermally spraying Babbitt metal coating on the surface of a crosshead, comprising the following steps: (1) decontaminating the surface of the crosshead; (2) sandblasting and roughing the decontaminated surface of the crosshead; (3) thermally spraying nickel and aluminum on the roughed surface of the crosshead to form a priming coating; and (4) thermally spraying Babbitt metal work coating to cover the nickel-aluminum priming coating. Due to the characteristics of the Babbitt metal, the Babbitt-metal coating formed on the surface of the crosshead by thermally spraying the Babbitt metal can be well used as an anti-friction coating. The crosshead coated with the Babbitt metal on the surface can be used for an air cylinder to store oil and reduce the coefficient of friction. The hardness of the crosshead is lower than that of the cylinder material, and the crosshead can be used as a friction pair.

Description

technical field [0001] The invention relates to a method for thermally spraying Babbitt alloy coating on the surface of a cross head. Background technique [0002] Thermal spraying technology is a fine and dispersed metal or non-metallic coating material, which is deposited on the surface of a prepared substrate in a molten or semi-molten state to form a certain spray deposition layer. It uses some kind of heat source (such as electric arc, plasma spraying or combustion flame, etc.) to heat powdery or filamentous metal or non-metallic materials to a molten or semi-molten state, and then sprays them at a certain speed by means of the flame itself or compressed air. The pretreated substrate surface is deposited to form a surface coating with various functions. [0003] Structural characteristics of thermal spray coating: The formation process of thermal spray coating determines the structural characteristics of the coating. The spray coating is a layered structure with countl...

Claims

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Application Information

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IPC IPC(8): C23C4/12C23C4/02C23C4/08C23C4/06C23C4/129C23C4/131
Inventor 赵华明徐文华王耀昇张铭
Owner 上海大豪纳米材料喷涂有限公司
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