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Isothermal welding method for producing copper-steel composite material

A technology of composite material and welding method, which is applied in the field of warm welding method, can solve the problems of low composite quality, expensive equipment, and increased cost, and achieve the effect of good composite quality, small production site and short construction period

Inactive Publication Date: 2003-12-17
何桂馥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods of producing copper-steel composite materials at home and abroad mainly include the copper casting method, which pours copper water into the gap reserved between the graphite ingot mold and the steel mandrel to make a copper-clad steel billet, and then hot-rolls it. Drawing into rods (wires), the steel mandrel of this method needs to be pickled, copper-plated and high-frequency preheated, the process is complicated, and pollutes the environment; moreover, due to the ingot mold and The steel mandrel absorbs heat and the temperature drops quickly, and the copper water cannot effectively cover the steel mandrel at the bottom of the component, which seriously affects its yield; third, this method does not form a metallurgical bond between copper and steel, and its composite quality is not high.
[0003] Recently, foreign manufacturers also adopt the hot-dip coating method to produce copper-steel composite materials. It passes the steel rod through the copper water from bottom to top, and strictly controls the temperature of the copper water, the temperature of the steel rod and the lifting speed of the steel rod. The difficulty of this method lies in the coordination of the temperature of copper water, the temperature of the steel rod and the lifting speed of the steel rod, which requires a high degree of self-control, so the equipment is expensive and complex For thick copper layer products, a second hot-dip coating is required, which further increases the cost

Method used

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  • Isothermal welding method for producing copper-steel composite material
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  • Isothermal welding method for producing copper-steel composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: one, preparation: make composite blank, refer to figure 1 It can be seen that the composite blank is composed of an outer wall 2 with a steel mandrel 1 inside, a hopper 3 fixed above the outer wall 2, a suspender 4 at the top of the steel mandrel 1, and a positioning rib 5 welded between the outer wall 2 and the top of the steel mandrel 1 .

[0021] 2. Heating, melting, cooling

[0022] First, add solid granular sodium chloride into the gap of the composite blank, and then add a small amount into the hopper to ensure that the molten sodium chloride can submerge the steel mandrel, and then add electrolytic copper blocks into the hopper. Hoist the fed composite billet into the heated well-type electric furnace and heat it to 1150°C. During the heating process, sodium chloride first melts to protect it; the iron oxide on the surface of the steel core rod melts and floats to the liquid surface; After the electrolytic copper melts, it sinks and squeezes the m...

Embodiment 2

[0027] Example 2: The difference between this example and Example 1 is that the protective agent used is barium chloride, and the composite blank is put into a well-type electric furnace and heated to 1130°C.

Embodiment 3

[0028] Embodiment 3: The difference between this example and Embodiment 1 is that no electrolytic copper block is added in the hopper, but when the composite blank and the protective agent boric acid are heated above the melting temperature of copper, copper water is poured into the steel of the composite blank. In the gap between the mandrel and the outer wall.

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Abstract

The present invention relates to an isothermal welding method for producing copper-steel composite material. Protective agent is first filled into the gap between the steel core rod and the outer wall; electrolytic copper is filled into the bin of composite blank; the composite blank is then set inside wall-type electric furnace to heat to 1130-1150 deg.c for electrolytic copper to smelt completely; and the power of the electric furnace is finally turned off section by section from the bottom to the top so that the composite blank is cooled to 1050 deg.c successively from bottom to top before discharge and air cooling. The present invention has simple technological process, high finished product rate and high product yield.

Description

technical field [0001] The invention relates to a production method of copper-steel composite material, in particular to an isothermal welding method for producing copper-steel composite material. Background technique [0002] Copper-steel composite material is a new type of material. It is a material that combines two metals, copper and steel, so that they can exert their respective characteristics. At present, the methods of producing copper-steel composite materials at home and abroad mainly include the copper casting method, which pours copper water into the gap reserved between the graphite ingot mold and the steel mandrel to make a copper-clad steel billet, and then hot-rolls it. Drawing into rods (wires), the steel mandrel of this method needs to be pickled, copper-plated and high-frequency preheated, the process is complicated, and pollutes the environment; moreover, due to the ingot mold and The steel mandrel absorbs heat and the temperature drops quickly, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16
Inventor 何桂馥何澍
Owner 何桂馥