Production method for copper-titanium composite tube

A production method and composite pipe technology, which is applied in the production field of copper-titanium composite pipe, can solve the problems of poor product quality, easy relative sliding, low yield, etc.

Inactive Publication Date: 2013-07-17
GOLDEN DRAGON PRECISE COPPER TUBE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Jiangsu Xingrong High-tech Co., Ltd. has applied for a patent "a production method of copper-aluminum composite pipe and copper-aluminum composite pipe manufactured by this method", patent number 200610076037.8. This patent also uses the planetary rolling method to produce composite pipe. This method The two materials of the produced composite pipe are easy to slide relative to each other and the head cracks, resulting in low yield and poor product quality

Method used

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  • Production method for copper-titanium composite tube

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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the production method of the copper-titanium composite pipe of the present embodiment comprises the following steps:

[0028] (1) Mill the copper tube billet produced by horizontal continuous casting to remove the oxide layer on the surface.

[0029] ⑵Use a steel brush to clean the surface to be compounded of the two materials, so that a new rough raised hardened layer is formed on the surface.

[0030] (3) Put the titanium tube inside the copper tube, and it is required to minimize the difference between the outer diameter of the titanium and titanium alloy tube and the inner diameter of the copper tube, because the mandrel head is placed inside the inner tube, the larger the gap between the two materials, the outer The more uneven the force on the tube.

[0031] ⑷ The two layers of material on the head are welded to form a composite tube blank. When welding, silver-based brazing material BAg72Cu is selected as the welding material of the c...

Embodiment 2

[0037] Such as figure 1 As shown, the production method of the copper-titanium composite pipe of the present embodiment comprises the following steps:

[0038] (1) Mill the copper tube billet produced by horizontal continuous casting to remove the oxide layer on the surface.

[0039] ⑵Use a steel brush to clean the surface to be compounded of the two materials, so that a new rough raised hardened layer is formed on the surface.

[0040] (3) Put the titanium tube inside the copper tube, and it is required to minimize the difference between the outer diameter of the titanium and titanium alloy tube and the inner diameter of the copper tube, because the mandrel head is placed inside the inner tube, the larger the gap between the two materials, the outer The more uneven the force on the tube.

[0041] ⑷ The two layers of material on the head are welded to form a composite tube blank. When welding, silver-based brazing material BAg72Cu is selected as the welding material of the c...

Embodiment 3

[0047] Such as figure 1 As shown, the production method of the copper-titanium composite pipe of the present embodiment comprises the following steps:

[0048] (1) Mill the copper tube billet produced by horizontal continuous casting to remove the oxide layer on the surface.

[0049] ⑵Use a steel brush to clean the surface to be compounded of the two materials, so that a new rough raised hardened layer is formed on the surface.

[0050] (3) Put the titanium tube inside the copper tube, and it is required to minimize the difference between the outer diameter of the titanium and titanium alloy tube and the inner diameter of the copper tube, because the mandrel head is placed inside the inner tube, the larger the gap between the two materials, the outer The more uneven the force on the tube.

[0051] ⑷ The two layers of material on the head are welded to form a composite tube blank. When welding, silver-based brazing material BAg72Cu is selected as the welding material of the cop...

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Abstract

The invention provides a production method for a copper-titanium composite tube. The method comprises the following steps: (1) sleeving a processed titanium tube in a copper tube and welding one end of the titanium tube and one end of the copper tube so as to form a composite tube blank; and (2) rolling the composite tube blank and carrying out composite drawing and annealing. According to the production method for the copper-titanium composite tube, ends of the two materials to be composited are welded before sleeve connection and rolling, so relative movement of the interior and exterior tubes during rolling is avoided; only one end of each tube are welded, so it is guaranteed that air between composite surfaces is effectively exhausted during rolling; because percentages of elongation of the two materials are different, lengths of the two materials may not be identical after rolling, so one-end welding allows free extension of metals along a length direction in the process of rolling to be realized and effective compositing of the two materials to be guaranteed.

Description

technical field [0001] The invention relates to a production method of a composite pipe, in particular to a production method of a copper-titanium composite pipe. Background technique [0002] Titanium and titanium alloys are widely used in heat exchange equipment due to their strong water impact resistance, such as shell and tube heat exchangers, coil heat exchangers, serpentine tube heat exchangers, condensers, evaporators and pipelines Wait. At present, many nuclear power industries use titanium tubes as the standard tubes for their units. [0003] At the same time, titanium tubes have high corrosion resistance to chlorides, sulfides and ammonia, and the corrosion resistance of titanium in seawater is higher than that of aluminum alloy, stainless steel, and nickel-based alloys. It is a future trend to replace other materials with titanium alloys for seawater desalination equipment. The multi-directional advantages of titanium materials determine the wide application sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06
Inventor 李红安郭宏林冯振国孟兆勇曹鲲鹏
Owner GOLDEN DRAGON PRECISE COPPER TUBE GROUP
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