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Wear-resistant cast iron coating and production method

A wear-resistant cast iron and coating technology, which is applied in coating, metal material coating process, hot-dip plating process, etc., can solve problems such as cracks and surface roughness, and achieve simple process, short coating time, and simple and easy operation line effect

Inactive Publication Date: 2009-07-29
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with thermal spraying, surfacing welding is simpler and more convenient, but it also has many problems, such as cracks caused by residual stress, rough surface, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Will 45 # The steel is processed into a sample with a size of φ30×200mm, and the surface is treated in two ways: ①The surface is treated by 100 # Sanding → alkali washing (boiling with 10% NaOH for 10 minutes) → water washing → pickling (washing with 36% HCl for 5 minutes) → water washing → drying at room temperature. ②The surface is sandblasted for 5 minutes.

[0014] The wear-resistant cast iron is heated and melted in a medium-frequency induction furnace with a power of 100KW, and the power used in the melting process is 80KW. After the melting is completed, it is kept at a temperature of 1150 ° C, and nitrogen or argon is passed into it for protection. A small amount of Al is added to the melt for deoxidation, and then the scum on the surface of the melt is removed.

[0015] The surface treated 45 # The steel is immersed in the molten cast iron for hot-dip plating, and the immersion time is controlled between 5 and 30s.

[0016] 45 after hot dip plating # Stee...

Embodiment 2

[0018] Will 45 # The steel is processed into a sample with a size of φ30×200mm, and the surface is treated in two ways: ①The surface is treated by 100 # Sanding → alkali washing (boiling with 10% NaOH for 10 minutes) → water washing → pickling (washing with 36% HCl for 5 minutes) → water washing → drying at room temperature. ②The surface is sandblasted for 5 minutes.

[0019] The wear-resistant cast iron is heated and melted in a medium-frequency induction furnace with a power of 100KW, and the power used in the melting process is 80KW. Insulate at a temperature of 1200 ° C, during which nitrogen or argon protection is introduced. A small amount of Al is added to the melt for deoxidation, and then the scum on the surface of the melt is removed.

[0020] The surface treated 45 # The steel is immersed in the molten cast iron for hot-dip plating, and the immersion time is controlled between 5 and 30s.

[0021] 45 after hot dip plating # Steel cools naturally in still air. ...

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Abstract

The invention provides an abrasion resisting cast iron coating and a preparation method thereof, belonging to the technical field of steel surface coating protection. The technique comprises: treating the steel surface; melting the abrasion resisting cast iron raw material under the protection of inactive gas in a furnace with the melting temperature of 1080-1200 DEG C; dipping the 45 steel after surface treatment into the abrasion resisting cast iron solution, wherein the hot dip coating lasts 5-30s and the abrasion resisting cast iron comprises the following composition by weight percentage: 5% of Ni, 2% of Cr, 3.1-3.3% of C, 0.8% of Si, 1.5% of B, 0.9% of Mn and the rest being Fe; cooling naturally in static air after the hot dip coating to form an abrasion resisting cast iron layer with the thickness of 0.5-10mm on the work-piece surface. The invention has the advantages of short period of coating preparation, high production efficiency, low requirement for equipment, no pollution in production process, simple technique, low cost and simple and easy operation, and is suitable for actual production.

Description

technical field [0001] The invention relates to the technical field of steel surface coating protection, and in particular provides a hot-dipping method for wear-resistant cast iron. Background technique [0002] Wear is one of the main forms of component failure, which can result in reduced equipment operation efficiency, frequent workpiece replacement or maintenance, increased energy consumption, etc., resulting in huge economic losses. At present, the methods to improve the wear resistance of parts are mainly surface modification and coating technology. Among them, the coating technology can use a very small amount of materials to play a role that is difficult for a large amount of expensive overall materials, which greatly reduces the cost of the product. [0003] Wear-resistant cast iron is widely used in mining, building materials, electric power and other industries because of its excellent wear resistance. There are many kinds of wear-resistant cast iron. Among the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/04C23C2/02C22C37/10
Inventor 郭志猛王立生林涛高治山郝俊杰邵慧萍罗骥
Owner UNIV OF SCI & TECH BEIJING
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