CN102528402A - Method for processing long-distance copper-clad steel tube - Google Patents

Abstract

The invention relates to a method for processing a long-distance copper-clad steel tube. The method is characterized by comprising the following steps of: 1) performing finish rolling, washing, derosination and thermal treatment; 2) electroplating, wherein a copper-plated layer is 30 to 60 mu m thick; 3) performing stability thermal treatment; and 4) selecting the number of unit copper-clad steel tubes according to a length of a required long-distance tube, wherein copper and a copper alloy welding wire are used as filling materials; an arc welding process adopts cold metal transition; the welding speed is 6 m/min; the welding protection gas is pure argon; and a weld joint between two steel tubes is controlled between 0.8 and 1.0 millimeter and simultaneously and continuously welded at high speed, so that the long-distance copper-clad steel tube is prepared. Manufacturing and processing of long-distance copper-clad steel tubes are realized; and the method is simple and practical, and the long-distance copper-coated steel tube is firm and reliable.

Description

A kind of processing method of growing apart from the copper-clad steel pipe

 

Technical field

The present invention relates to a kind of processing method of growing apart from the copper-clad steel pipe, relate in particular to the processing method of a kind of length that makes through the lead welding of high speed electric arc apart from the copper-clad steel pipe.

 

Background technology

At present, global copper resource reduces day by day, and the high always enterprise of copper price is not down; The refrigerator, the Air-conditioning Enterprise that belong to copper pipe consumption rich and influential family; Seeking cheap, reliable quality substitute always, price competitiveness is being arranged, also at the various new products of active development for making product.Various new technologies, new technology, new material emerge in an endless stream, and at present, on air-conditioning, bring into use various copper pipe substitute materials.

The copper-clad steel pipe adopts advanced metal composite process technology, coats at the precision seamless steel tubes surfaces externally and internally to form, and makes between steel and the copper and form interatomic the combination, has possessed the corrosion-resistant and antioxygenic property of copper, and has had following characteristics:

1, the copper clad steel pipe has good anti-corrosion, and steel is more perishable than copper under the normal condition, but because the steel in the copper-clad steel pipe is coated by copper is complete, has improved steel and be prone to oxidation, the characteristic of corrosion.

2, the copper-clad steel pipe adopts advanced technologies, and the combining closely of its copper and steel can be according to the actual operating position of user, but processing is crooked or once more moulding also thermal-flame weld, its surperficial copper can not come off, and has kept the character of copper pipe.

3, to have a relative cost low for the copper clad steel pipe, and price is relatively stable, and it is expensive to overcome copper pipe, and the price unstability.

Usually adopt galvanoplastic to produce the copper clad steel pipe in the prior art, yet because equipment is limit, said method is difficult to the Direct Production long-distance pipe.General long-distance pipe in the prior art; Be again that it is welded together through the pipeline for preparing a plurality of unit lengths; Yet traditional induction welding welding method can't weld the copper-clad steel pipe; Because the fusing point of copper is lower than carbon steel, copper steel dissolves the back and forms fully not solid solution, therefore can't guarantee the stability and the corrosion resistance of a plurality of copper-clad steel pipes weld seam each other.

 

Summary of the invention

To above problem of the prior art, the object of the present invention is to provide the processing method of a kind of length of processing through high-speed welding apart from the copper-clad steel pipe, it can realize the butt joint between a plurality of copper-clad steel pipes, and is simple and practical and solid and reliable.

The present invention has adopted following technical scheme: a kind of processing method of growing apart from the copper-clad steel pipe, it is characterized in that, and make by following steps:

1) common steel tube of selection unit's length carries out finish rolling, and cleaning and degreasing carries out 500 ℃ of-1000 ℃ of heat treatments more then, is being incubated more than 1 hour under the protection of reducibility gas;

2) finish dealing with after, adopt built-in electrode to add anti-contact mat, add convection tube, electroplate, copper coating thickness is 30 μ m-60 μ m;

3) electroplate the processing hot in nature of the laggard line stabilization of completion, heat treatment temperature is 300 ℃-800 ℃, and insulation made unit length copper-clad steel pipe more than 1 hour after coming out of the stove under the reducibility gas protection;

4) as required the number of length selection unit copper-clad steel pipe of long distance pipe; Add and fill material employing copper and copper alloy welding wire, arc welding process adopts the cold metal transition, and speed of welding adopts 6m/min, and protection-gas welding adopts pure argon, and the weld gap between steel pipe is controlled between the 0.8-1.0mm; Weld seam between each adjacent steel pipe is carried out the high-speed and continuous welding simultaneously, thereby make long apart from the copper-clad steel pipe.

Compared with prior art, length of the present invention has the following advantages apart from the high speed electric arc lead welding method of copper-clad steel pipe:

A. adopt copper and copper parent metal to connect together, realize that the steel in the copper-clad steel pipe is coated by copper fully, guarantee that liquid can't infiltrate in the steel, and weld strength has reached and adds the intensity of filling material and have good anti-corrosion as the copper layer of lead material with adjacent steel pipe;

B. existing high-speed welding technology, protection gas adopts ternary or quaternary gas more, and the present invention adopts the protective gas of pure argon as High Speed Welding, and the with low cost and 5-10 that can reach conventional inert gas-shielded arc welding speed of welding is doubly;

C. this electric arc lead welding method can make carbon steel not melt, and the fusing of copper layer stoped the generation of copper steel intermetallic compound effectively, guaranteed welding quality;

D. cold metal transition welding method has reduced hot input quantity, has reduced the deflection of postwelding workpiece effectively.

 

The specific embodiment

The application has selected following preferred step and parameter through a large amount of experiments,

1) common steel tube of selection unit's length carries out finish rolling, and cleaning and degreasing carries out 500 ℃ of-1000 ℃ of heat treatments more then, is being incubated more than 1 hour under the protection of reducibility gas;

2) finish dealing with after, adopt built-in electrode to add anti-contact mat, add convection tube, electroplate, copper coating thickness is 30 μ m-60 μ m;

3) electroplate the processing hot in nature of the laggard line stabilization of completion, heat treatment temperature is 300 ℃-800 ℃, and insulation made unit length copper-clad steel pipe more than 1 hour after coming out of the stove under the reducibility gas protection;

4) as required the number of length selection unit copper-clad steel pipe of long distance pipe; Add and fill material employing copper and copper alloy welding wire, arc welding process adopts the cold metal transition, and speed of welding adopts 6m/min, and protection-gas welding adopts pure argon, and the weld gap between steel pipe is controlled between the 0.8-1.0mm; Weld seam between each adjacent steel pipe is carried out the high-speed and continuous welding simultaneously, thereby make long apart from the copper-clad steel pipe.

Adopt this manufacturing approach; Especially after passing through high-speed welding, the weld strength that the drawn test records between the adjacent cells steel pipe is 160 ~ 180MPa, has reached and has added the intensity of filling material; And the steel in the copper-clad steel pipe is coated by copper fully; Reached the serviceability of corrosion resistance etc., thereby guaranteed long performance, and can select the length of said steel pipe as required apart from the copper-clad steel pipe.

Claims (1)

1. one kind long processing method apart from the copper-clad steel pipe is characterized in that, is made by following steps:

1) common steel tube of selection unit's length carries out finish rolling, and cleaning and degreasing carries out 500 ℃ of-1000 ℃ of heat treatments more then, is being incubated more than 1 hour under the protection of reducibility gas;

2) finish dealing with after, adopt built-in electrode to add anti-contact mat, add convection tube, electroplate, copper coating thickness is 30 μ m-60 μ m;

3) electroplate the processing hot in nature of the laggard line stabilization of completion, heat treatment temperature is 300 ℃-800 ℃, and insulation made unit length copper-clad steel pipe more than 1 hour after coming out of the stove under the reducibility gas protection;

4) as required the number of length selection unit copper-clad steel pipe of long distance pipe; Add and fill material employing copper and copper alloy welding wire, arc welding process adopts the cold metal transition, and speed of welding adopts 6m/min, and protection-gas welding adopts pure argon, and the weld gap between steel pipe is controlled between the 0.8-1.0mm; Weld seam between each adjacent steel pipe is carried out the high-speed and continuous welding simultaneously, thereby make long apart from the copper-clad steel pipe.