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Hot spray surface reinforcing process for nodular cast iron plunger

A ductile iron and surface strengthening technology, applied in metal material coating process, coating, melt spraying and other directions, can solve the problems of difficult chrome plating, limit the application of ductile iron, etc., to achieve easy operation, improve wear resistance, a wide variety of Effect

Active Publication Date: 2006-10-25
广州市天河区金棠表面工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to chrome-plate the surface of ductile iron, thus limiting the application of ductile iron as a plunger material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Surface purification of the workpiece

[0041] The surface of the nodular cast iron substrate is purified by combining flame baking and solvent, and the nodular cast iron substrate is flame-baked with an oxygen-acetylene flame gun. After the surface of the cast iron substrate is purified, there is no visible oil stain on the surface;

[0042] 2. Surface pretreatment

[0043] Use 20# brown corundum to sandblast the ductile iron substrate, and the compressed air pressure is 0.5kg / cm 2 kg / cm 2 , the surface roughness after blasting reaches Sa3 level.

[0044] 3. Spraying metal ceramic coating

[0045] Use a supersonic flame spray gun to spray cermet coating on the nodular cast iron substrate, the material is WC-12Co spray powder; the flame center line of the spray gun intersects the axis of the workpiece perpendicularly, with an error of ±5°; the spray distance is 250mm; the parameter control is O 2 : 15SCFM, C 3 h 6 : 200SCFH; the workpiece temperature is contro...

Embodiment 2

[0052] 1. Surface purification of the workpiece

[0053] The surface of the ductile iron substrate is purified by combining flame baking and solvent, and the ductile iron substrate is flame-baked with an oxygen-acetylene flame gun. After the surface of the cast iron substrate is purified, there is no visible oil stain on the surface;

[0054] 2. Surface pretreatment

[0055] Use 20# brown corundum to sandblast the ductile iron substrate, and the compressed air pressure is 0.7kg / cm 2 , the surface roughness after blasting reaches Sa3 level.

[0056] 3. Spraying metal ceramic coating

[0057] Use a supersonic flame spray gun to spray cermet coating on the nodular cast iron substrate, the material is WC-12Co spray powder; the flame center line of the spray gun intersects the axis of the workpiece perpendicularly, with an error of ±5°; the spray distance is 200mm; the parameter control is O 2 : 18SCFM, C 3 h 6 : 240SCFH; the workpiece temperature is controlled below 200°C duri...

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PUM

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Abstract

The invention discloses the gushing the surface using the heating intensifying process of the nodular cast iron pole stuff, the process is showed below: the nodular cast iron base body is cleaned using the firing and the solvent, the nodular cast iron is roasted by the fire; the nodular cast iron base body is cleaned with removing the oil, the cleaned nodular cast iron base body is clear, the naked eye can't see the oil trace on the surface; and the nodular cast iron base body is gushed with emery and the cermet coat; the gushed nodular cast iron is milled and polished to gain the finished product. The invention has many merits such as taking the nodular cast iron substitute the forging steel, taking the heat gushing layer substitute the chromeplated layer in order to the milling-resisting of the surface of the pole stuff, the easy handling, the agility, the efficiency and the saving energy.

Description

technical field [0001] The invention relates to a process for strengthening the surface of a nodular cast iron plunger by high-speed flame thermal spraying, in particular to a process for strengthening the surface of a nodular cast iron plunger for a ceramic automatic hydraulic brick press. Background technique [0002] The ceramic automatic hydraulic brick press is a high-tech key equipment in the world's ceramic wall and floor tile production lines. It is preceded by a raw material processing process and followed by a drying and firing process. During the production process, if the press stops, the whole line will stop working, which will directly affect the production efficiency and economic benefits of the enterprise. [0003] The ceramic hydraulic brick press is the equipment with the worst working conditions and high reliability requirements among all kinds of existing mechanical equipment. When a machine goes online, it is in the state of standby ...

Claims

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Application Information

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IPC IPC(8): C23C4/02B24C1/00C23C24/00C23G5/00
Inventor 李运初谢家浩曾良高海青
Owner 广州市天河区金棠表面工程技术有限公司