Welding assistant powder for cast iron spot welding

A welding powder and spot welding technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of poor fusion welding and spot welding process welding, etc., and achieve the effect of high welding strength and simple operation.

Inactive Publication Date: 2005-12-07
袁媛
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0002] At present, iron and steel materials can be welded by spot welding, but cast iron has poor fusion weldability due to its higher magnesium, manganese, carbon and other components than iron and steel. In the prior art, only special electrodes can be used to pass through the arc. welded or brazed with copper, but cannot be welded by spot welding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] The present invention will be further described below according to the embodiments.

[0007] The weight ratio of the various compositions that embodiment adopts is:

[0008] Graphite powder 35%

[0009] Nickel 15%

[0010] Copper Powder 15%

[0011] Iron powder 35%

[0012] The particles of various powders are between 100-200 mesh.

[0013] When welding, clean the surface of the object to be welded, sprinkle this flux powder, and weld between the electrodes of the spot welding machine. The high temperature generated by the current will oxidize the graphite powder to CO 2 gas, CO 2 The gas has a protective effect on the solder joints and prevents the oxidation of the material. The alloy formed by melting nickel powder, copper powder and iron powder penetrates into the cast iron material to form a firm alloy welding layer, which has high strength after cooling and achieves the purpose of welding.

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PUM

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Abstract

The invention relates to a welding flux used to cast iron and point welding. It is formed by mixing graphite powder, nickel powder, copper powder and iron powder together with each element's weight ratio: graphite powder 30-40úÑ, nickel powder10-20úÑ, copper powder10-20úÑ and iron powder 30-40úÑ. It locates the welding flux between the two parts waiting for welding, and uses the welding high temperature of the point welding machine to oxide graphite powder and changes it into CO.2. gas which has protecting function; the alloy which is formed by fusing the nickel powder, copper powder and iron powder can diffuse into cast iron material to form welding layer.

Description

technical field [0001] The invention relates to welding technology, in particular to a welding flux material for cast iron spot welding process. Background technique [0002] At present, iron and steel materials can be welded by spot welding, but cast iron has poor fusion weldability due to its higher magnesium, manganese, carbon and other components than iron and steel. In the prior art, only special electrodes can be used to pass through the arc. welding or copper brazing, but cannot be welded by spot welding. Contents of the invention [0003] The object of the present invention is to provide a welding flux material to realize spot welding of cast iron materials. [0004] The scheme of the present invention is: the welding flux powder that is used for cast iron spot welding is mixed by graphite powder, nickel powder, copper powder, iron powder, and the ratio (weight ratio) of various compositions is graphite powder 30-40%, Nickel 10-20%, copper powder 10-20%, iron pow...

Claims

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Application Information

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IPC IPC(8): B23K35/24
Inventor 袁媛
Owner 袁媛
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