Production method of totally-coated metal composite pipe

A metal composite pipe and production method technology, applied in the direction of pipe, rigid pipe, pipeline protection, etc., can solve the problems of difficult industrialized production, low production and yield, difficult production process, etc., to achieve convenient product use and controllable production scale , the effect of reducing costs

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Problems solved by technology

[0013] At present, the traditional method of manufacturing titanium-steel composite pipes is mainly explosive cladding, and it is possible to manufacture composite plates, but it is difficult to industrialize production due to the relatively difficult manufacturing process and low production and yield of titanium-steel-titanium composite pipes.

Method used

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  • Production method of totally-coated metal composite pipe

Examples

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Effect test

Embodiment 1

[0037] according to figure 1 The structure and production method of the fully clad metal composite tube blank of the present invention are described in detail. The production method of the fully clad metal composite pipe comprises the following steps:

[0038] Processing of composite tube billet structure: separately process or select Q235 steel pipe material 2 with connecting threads at both ends, pure titanium TA0 outer layer titanium tube 1 material and pure titanium TA0 inner layer titanium tube 3 material matching the inner and outer dimensions of Q235 steel pipe material , and the pure titanium TA0 metal pipe head 4 threaded with the two ends of the low-carbon steel pipe material. Then, from the outside to the inside, the inner pure titanium TA0 pipe material 3, the Q235 steel pipe material and the outer pure titanium TA0 pipe material 1 are combined together to form a composite pipe blank, in which the inner layer pure titanium TA0 pipe material The two ends of the ou...

Embodiment 2

[0042] According to the needs of the application field of the present invention, the titanium pipe materials are selected: pure titanium TA0, pure titanium TA1, pure titanium TA2; the materials of the low carbon steel pipe materials are selected: Q235, 16Mn, No. 20 steel, 20g boiler steel.

[0043] The structure of the fully clad metal composite tube blank in this embodiment is the same as in Example 1; and the production method of the fully clad metal composite tube of the present invention is as follows:

[0044] First select pure titanium TA2 titanium tube and 20g boiler steel steel tube for blanking (radial size: titanium tube D84 / d82--steel tube D82 / d72--titanium tube D72 / d70, length 1000)——Used at both ends of the steel tube The threaded connection method is matched with two titanium metal pipe heads - the joint surface is treated to ensure that the metal is fresh and clean - the billet is assembled (the radial dimension of the composite pipe blank is D84 / d70, and the len...

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Abstract

A production method of a totally-coated metal composite pipe is technically characterized by including the steps of hermetically nesting a titanium tube, a steel tube and another titanium tube, connecting titanium heads to two ends of the steel tube in a threaded manner, and welding the inner titanium tube and the outer titanium tube on the titanium heads to ensure the steel tube is completely coated with titanium integrally; performing rolling, combining, rounding, straightening, deheading and sizing to obtain a finished product. According to the method, the totally-coated metal composite pipe is manufactured by a cold-rolling method. In terms of oil exploitation, chemical industry, fine chemicals, heat exchangers and marine pipelining, the composite pipe is completely coated with the titanium to keep properties of the titanium, product strength is guaranteed by using a low-cost base steel tube as a structural portion, the titanium heads at two ends can be connected by welding, and a screw thread can also be made for mechanical connection. The totally-coated metal composite pipe has the advantages such that the performance is high, the cost is low, the service life is long, and applicable range is wide. The production method is insusceptible to seasons and free of environmental pollution, and production scale and product specification are controllable.

Description

technical field [0001] The invention relates to the technical field of metal composite pipes, in particular to a production method of fully covered metal composite pipes. Background technique [0002] Metal pipes are widely used, mainly for the transportation of gas and liquid, and some of them are used in metal structures. At present, the most widely used are steel pipes, stainless steel pipes, copper pipes, aluminum pipes and titanium pipes. Due to the wide use of pipes, there are also many problems. The most prominent are corrosion resistance and strength issues. [0003] In the oil extraction of oil fields, the corrosion of pipe fittings by acid ions in crude oil is a difficult problem that has not been solved for many years. The corrosion and fracture of steel oil well casings often cause oil wells to be scrapped, accounting for more than 30% of scrapped oil wells; oil pipeline leakage sometimes brings disasters Sexual damage, such as an explosion caused by a leak in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00F16L9/02F16L58/08
CPCB21C37/06F16L9/04F16L58/08
Inventor 宋洪海刘波孙得志阎东辉钟军
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