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Copper and steel bimetal bridging welding method

A welding method and bimetallic technology, applied in welding equipment, metal processing equipment, welding/welding/cutting items, etc., can solve the problems of poor air tightness of workpieces, low tensile strength of joints, high requirements for welding personnel, etc., and achieve good welding , easy to standardize operation, combined with tight effect

Inactive Publication Date: 2014-04-30
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a copper-steel bimetallic bridging welding method, which changes the traditional direct welding method of steel / copper dissimilar metals by utilizing the "bridge" welding of two materials of steel and copper , so as to improve the welding strength and material properties of steel / copper bimetal, the purpose is to solve the problems of poor air tightness of the workpiece after welding, low joint tensile strength and high requirements for welding personnel in the existing copper-steel brazing method

Method used

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  • Copper and steel bimetal bridging welding method
  • Copper and steel bimetal bridging welding method
  • Copper and steel bimetal bridging welding method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In this embodiment, 304 stainless steel and aluminum bronze are bridge welded, and the specific steps are:

[0025] (1) Pickle the 304 stainless steel barrel and remove the surface oil, prepare the aluminum bronze material with the same composition as the aluminum bronze to be welded, cut it into blocks, and prepare charcoal accounting for 0.5% of the total weight of the aluminum bronze;

[0026] (2) Mix the aluminum bronze material with charcoal and put it into the steel drum. The total volume of aluminum bronze and charcoal is 20% of the total volume of the inner space of the steel drum. The stainless steel with the same composition as the stainless steel to be welded The stainless steel cover is welded and fixed on the 304 stainless steel barrel, and the round hole is connected with the inside of the 304 stainless steel barrel, and then the steel barrel is placed in a heating furnace, heated to 1050 ° C, kept for 60 minutes, and a melt is formed in the 304 stainle...

Embodiment 2

[0032] In this embodiment, 20# steel and tin bronze are carried out for bridging welding, and the specific steps are:

[0033] (1) Pickle the 20# steel drum and remove the surface oil, prepare the tin bronze material with the same composition as the tin bronze to be welded, cut it into blocks, and prepare charcoal accounting for 1% of the total weight of the tin bronze;

[0034] (2) Put tin bronze and charcoal into the steel drum, the total volume of copper and charcoal is 40% of the total volume of the inner space of the steel drum, weld and fix the 20# steel cover with a round hole in the center to the 20 #On the steel drum, the round hole is connected to the inside of the 20# steel drum, and then the steel drum is placed in a heating furnace, heated to 1200 ° C, kept for 30 minutes, and a melt is formed in the 20# steel drum;

[0035] (3) Put the 20# steel drum containing the melt into the centrifuge, turn on the centrifuge and rotate at a speed of 500rpm, the melt is gradu...

Embodiment 3

[0040] Present embodiment is that 20# steel and brass are carried out bridge welding, concrete steps are:

[0041] (1) Pickle the 20# steel drum and remove the surface oil, prepare the brass material with the same composition as the brass to be welded, cut it into blocks, and prepare charcoal accounting for 2% of the total weight of the brass;

[0042] (2) Put the brass material and charcoal into the steel drum after mixing. The total volume of the copper material and charcoal is 60% of the total volume of the inner space of the steel drum. Weld and fix the 20# steel cover with a round hole in the center On the 20# steel drum, the round hole is connected to the inside of the 20# steel drum, and then the steel drum is placed in a heating furnace, heated to 1350 ° C, kept for 10 minutes, and a melt is formed in the 20# steel drum;

[0043] (3) Put the 20# steel drum containing the melt in the centrifuge, turn on the centrifuge and rotate at a speed of 650rpm, the melt is gradually...

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Abstract

The invention belongs to the technical field of metal welding, and particularly relates to a copper and steel bimetal bridging welding method. The method includes firstly adding copper material and charcoal into a steel drum, then placing the steel drum in a heating furnace to form flux inside, placing the steel drum with the flux into a centrifuge, turning on the centrifuge to rotate in the speed of 400 to 800 rpm, allowing the flux to cool till solidifying as copper alloy, allowing the middle of the copper alloy to form a sump, obtaining a bimetal drum, then placing the bimetal drum into casting sand to cool till room temperature, obtaining a bimetal combined drum, rolling, extruding, tensioning, forging and cutting the bimetal combined drum, obtaining a steel and copper welding bridge, welding steel to be welded to the steel side of the welding bridge, welding copper to be welded to the copper side of the welding bridge, and finishing steel and copper welding. According to the technical scheme, the atomically-bound copper and steel bimetal serves as a bridge, copper and copper, steel and steel can be welded easily, and copper and steel bimetal welding can be realized.

Description

technical field [0001] The invention belongs to the technical field of metal welding, in particular to a copper-steel double-metal bridge welding method. Background technique [0002] In the research and application of traditional industries, due to the large differences in physical and chemical properties of steel and copper alloys, they are classified as ferrous metals and non-ferrous metals respectively; but in aerospace, nuclear power plants, electromechanical, chemical, metallurgical and other industrial manufacturing Welding joints of composite components formed between steel and copper or copper alloys can be seen. On the one hand, the connection of steel and copper or copper alloy can form a metal structure that meets various special needs, especially workpieces that require both high strength and high electrical and thermal conductivity; on the other hand, copper alloy surfacing on steel It can improve the performance of the workpiece surface, such as improving wea...

Claims

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Application Information

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IPC IPC(8): B23K31/02
CPCB23K28/00B23K2103/22B23P15/00
Inventor 陈进耿王群骄崔建忠
Owner NORTHEASTERN UNIV
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