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Carbon steel / stainless steel composite material and preparation

A composite material and stainless steel technology, applied in metal material coating process, hot-dip plating process, coating, etc., can solve the problems of expensive equipment, low production efficiency, insufficient research on processing technology, etc., and achieve simple operation and high production efficiency. The effect of short time and simple process

Inactive Publication Date: 2009-07-22
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they also have some disadvantages. For example, the material range of extrusion compounding is limited, a high-power extruder is required, and continuous production is not possible; rolling compounding generally requires a deformation rate as high as 60% to 70%. The main disadvantages of diffusion bonding are: high requirements on the quality of the welding surface, low production efficiency, expensive equipment, and unstable welding quality; ultrasonic welding can only be used for extremely thin materials at present; research on the follow-up processing technology of explosive welding composite materials Insufficient, resulting in limited application of explosive welding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) will 45 # Surface treatment of steel: surface after 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.

[0014] (2) Stainless steel is heated and melted in a medium-frequency induction furnace with a power of 100KW, and the power is set to 80KW during melting. After the melting is completed, it is kept at a temperature of 1450°C, and nitrogen or argon is used for protection during the melting process. 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] (3) 45 after surface treatment in (1) # The steel is immersed in the molten stainless steel in a vertical manner, and the immersion time is controlled between 1 and 10s.

[0016] (4) 45 after hot-dip stainless steel # Steel cools naturally in still air. In this way, stainless steel with a thickness between 0.5 and...

Embodiment 2

[0018] (1) will 45 # Surface treatment of steel: surface after 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.

[0019] (2) Stainless steel is heated and melted in a medium-frequency induction furnace with a power of 100KW, and the power is set to 80KW during melting. After the melting is completed, it is kept at a temperature of 1500 ° C, and nitrogen or argon is used for protection during the melting process. 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] (3) 45 after surface treatment in (1) # The steel is immersed in the molten stainless steel in a vertical manner, and the immersion time is controlled between 1 and 10s.

[0021] (4) 45 after hot-dip stainless steel # Steel cools naturally in still air. In this way, stainless steel with a thickness between 0.5 a...

Embodiment 3

[0023] (1) will 45 # Surface treatment of steel: surface blasting for 5 minutes.

[0024] (2) Stainless steel is heated and melted in a medium-frequency induction furnace with a power of 100KW, and the power is set to 80KW during melting. After the melting is completed, it is kept at a temperature of 1450°C, and nitrogen or argon is used for protection during the melting process. A small amount of Al is added to the melt for deoxidation, and then the scum on the surface of the melt is removed.

[0025] (3) 45 after surface treatment in (1) # The steel is immersed in the molten stainless steel in a vertical manner, and the immersion time is controlled between 1 and 10s.

[0026] (4) 45 after hot-dip stainless steel # Steel cools naturally in still air. In this way, stainless steel with a thickness between 0.5 and 3 mm is formed on the surface of the workpiece. 45 # The interface between steel and stainless steel is a metallurgical bond.

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Abstract

The invention relates to a preparation method of carbon steel or stainless steel composite, which belongs to the technical field of metal composites. The components of the stainless steel (wt percent) are as follows: less than or equal to 0.15 percent of C, 17 percent to 19 percent of Cr, 8 percent to 10 percent of Ni, less than or equal to 1 percent of Si, less than or equal to 2 percent of Mn, less than or equal to 0.035 percent of P, less than or equal to 0.030 percent of S and the balance of ferrite. The processes comprises surface treatment of 45 steel, melting of the stainless steel under the protection of the inert gas in a medium frequency induction furnace and the melting temperature is between 1400 DEG C and 1500 DEG C, immersion into the stainless steel molten of the 45 steel for 1 to 10 seconds after the surface treatment and natural cooling in the standing air. A stainless steel layer of the thickness between 0.5 to 3mm can be formed on the surface of the 45 steel. The method has the advantages of short production time, high efficiency, simple equipment with little effect on the service life, continuous production, and simple and easy operation, being suitable for practical production, simple process and low cost.

Description

technical field [0001] The invention relates to the technical field of metal composite materials, in particular to a method for preparing a carbon steel / stainless steel composite material. Background technique [0002] Carbon steel is one of the most widely used structural materials. However, it is easy to corrode during use, while stainless steel has excellent corrosion resistance. It can be used without reducing the strength of the material and requires good corrosion resistance on the surface. The two are made of carbon steel / stainless steel composite material, thereby reducing the amount of stainless steel and reducing the cost of materials. [0003] The preparation methods of carbon steel / stainless steel composite materials mainly include extrusion composite method, rolling uniform method, diffusion welding method, ultrasonic welding and explosive composite method. The common advantages of these methods are: the material does not melt, there is no welding zone, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/40C22C38/58C23C2/04C23C2/02
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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