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Method for improving anti-erosion property of Ni-based coating

An anti-erosion and coating technology, which is applied in the direction of coating, metal material coating process, hot-dip plating process, etc., can solve the problems of poor bonding between hard phase and substrate, poor coating compactness, and coating efficiency. Low-level problems, to achieve the effect of good bonding state, controllable coating thickness and short coating time

Inactive Publication Date: 2012-05-09
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Surfacing and spray welding are simple and practical, especially suitable for production sites. Coating technologies such as spray coating, cladding and vacuum melting are stable and reliable in continuous operation, with a wide range of powder selection, flexible adjustment of coating thickness and mechanical properties, and simple operation and maintenance. It has been widely researched and applied in recent years, but the efficiency and cost of these coatings are low, the hard phase is not firmly bonded to the substrate and the distribution is uneven, and the compactness of the coating is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Will 45 # The steel is processed into a sample with a size of 200×150×7mm, and the surface is treated in two ways: ①The surface is treated by 100 # Sandpaper polishing→alkali cleaning (boiling with 10% NaOH for 10min)→water washing→pickling (cleaning with 36%HCl for 5min)→water washing→drying→flux treatment→drying. ②Surface sandblasting (5min)→water washing→drying→plating flux treatment→drying.

[0018] The nickel base alloy is melted in a 100KW intermediate frequency induction furnace with 15wt% cemented carbide, and the power selected for the melting process is 80KW. After the melting is completed, it is kept at a temperature of 1100 ° 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.

[0019] The surface treated 45 # The steel is immersed in the nickel-based alloy solution for hot-dip plating, and the immersion time is controlled between 5 ...

Embodiment 2

[0022] Will 45 # The steel is processed into a sample with a size of 200×150×7mm, and the surface is treated in two ways: ①The surface is treated by 100 # Sandpaper polishing→alkali cleaning (boiling with 10% NaOH for 10min)→water washing→pickling (cleaning with 36%HCl for 5min)→water washing→drying→flux treatment→drying. ②Surface sandblasting (5min)→water washing→drying→plating flux treatment→drying.

[0023] The nickel-based alloy is melted in a 100KW intermediate frequency induction furnace, and 17wt% hard alloy is added, and the power selected for 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.

[0024] The surface treated 45 # The steel is immersed in the nickel-based alloy solution for hot-dip plating, and the immersion time is controlled betwee...

Embodiment 3

[0027] Will 45 # The steel is processed into a sample with a size of 200×150×7mm, and the surface is treated in two ways: ①The surface is treated by 100 # Sandpaper polishing→alkali cleaning (boiling with 10% NaOH for 10min)→water washing→pickling (cleaning with 36%HCl for 5min)→water washing→drying→flux treatment→drying. ②Surface sandblasting (5min)→water washing→drying→plating flux treatment→drying.

[0028] The nickel base alloy is melted in a 100KW intermediate frequency induction furnace with 20wt% cemented carbide, and the power selected for the melting process is 80KW. After the melting is completed, it is kept at a temperature of 1200 ° 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.

[0029] The surface treated 45 # The steel is immersed in the nickel-based alloy solution for hot-dip plating, and the immersion time is controlled between 5 ...

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Abstract

The invention belongs to the technical field of steel surface coating protection and provides a method for improving anti-erosion property of Ni-based coating. The method comprises the following steps: steel surface is treated, Ni-based alloy is smelt under the protection of inert gas, 15wt%-20wt% of hard alloy is added, and the smelt temperature is controlled between 1100 DEG C and 1200 DEGC; the carbon steel and low alloy steel after surface treatment are dipped into the Ni-based alloy solution, and the hot dipping time is 5-20s; the carbon steel and the low alloy steel after hot dipping are placed in the air for stewing and natural cooling, and the surface of the workpiece can form Ni-based coating with the thickness of 0.5-10mm. The invention has the advantages of improving coating hardness, refining the texture and obtaining coating with fine anti-erosion property by the alloying method. The invention also features short preparation time for coating, high production efficiency, controllable coating thickness, good junction state between the coating and the basal body, no pollutant in the production process, simple process and low cost. The operation of the method is simple and feasible, which is applicable to actual production.

Description

technical field [0001] The invention relates to the technical field of steel surface coating protection, and particularly provides a method for improving the performance of nickel-based coatings. Background technique [0002] The wear of metal parts is an important form of material failure. About 75% to 80% of the failure of mechanical parts is caused by wear. In 2006, the loss caused by friction and wear in my country reached 960 billion yuan. The erosion and wear of materials caused by the impact or erosion of solid particles is an important reason for the damage and scrapping of many machinery and equipment and parts in industrial production. The erosion and wear of solid particles in engineering can be seen everywhere, such as dust and sand in the air can reduce the life of helicopter engines by 90%; the damage caused by the erosion of heat exchanger pipes by the exhaust gas of pulverized coal boilers in thermal power plants It roughly accounts for 1 / 3 of pipeline dama...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/04
Inventor 郭志猛刘祥庆王立生高治山林涛贾磊
Owner UNIV OF SCI & TECH BEIJING
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