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Method for manufacturing metal compound pipe by braze welding, hot rolling and continuous welding

A technology of welding metals and manufacturing methods, which is applied in the direction of manufacturing tools and other manufacturing equipment/tools, can solve the problems of high cost, affecting the performance of composite pipes, and low bonding strength, achieving huge economic and social benefits, and solving different problems. Element penetration problem, excellent effect of anti-corrosion performance

Inactive Publication Date: 2007-04-25
吉欣(英德)热轧不锈复合钢有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, it is more reasonable to use stainless steel pipes to manufacture pressure vessels and pipes that require corrosion resistance, but the cost is high; The thickness of the stainless steel pipe is only 2 to 10% of the overall thickness, which not only meets the corrosion resistance and high enough strength of the container, but also greatly reduces the cost
In addition, some metal materials with excellent heat resistance, corrosion resistance, electrical conductivity and thermal conductivity, such as copper, manganese, titanium or chromium, have the problem of scarcity of resources. If double-layer or multi-layer composite pipes are used, it will not only help save Resources, can also meet the special needs of many projects
[0003] At present, metal composite pipes are mainly processed and manufactured by mechanical composite methods, such as the welding composite method of different metals in the pipe making unit, hydraulic composite method, drawing composite method, etc., or the welding composite method of bending and welding composite steel plates, etc. The disadvantages of the composite pipes produced by different metal welding composite methods, hydraulic composite methods and drawing composite methods of the pipe unit are: the joint surface between the two layers of metal is physically bonded, its bonding strength is low, and the post-processing performance of the composite pipe is poor. (It cannot be bent, folded, welded, pressed, etc.); the disadvantages of the composite pipe produced by the welding composite method are: due to the penetration between different metal elements in the end face welding of the composite layer, the performance of the composite pipe is affected

Method used

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  • Method for manufacturing metal compound pipe by braze welding, hot rolling and continuous welding
  • Method for manufacturing metal compound pipe by braze welding, hot rolling and continuous welding

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Using 2.5mm carbon steel strip coil (carbon steel model is Q235) as base metal coil and 0.5mm stainless steel coil (stainless steel model is 316L) as multilayer coil to produce 25mm×3.0mm continuous welded composite steel pipe.

[0027] First, place the 2.5mm base carbon steel strip coil and the 0.5mm multilayer metal stainless steel strip coil in the uncoiler and then enter the cleaning machine for cleaning to remove the surface oil and surface oxides on the surface to be composited; then send them into the composite pipe Welding pipes are divided into the unit, and at the same time, the brazing material foil strip with a thickness of 3 microns is uncoiled by an uncoiler and then placed between the carbon steel strip of the base metal and the stainless steel strip of the cladding metal to obtain a continuous welded cladding The continuous welded clad tube is rapidly heated to 750°C by high frequency, and then directly enters the 12-pass horizontal and vertical continuou...

Embodiment 2

[0029] The 5mm carbon steel strip coil (carbon steel model is Q235) is used as the base pipe and the 2.5mm clad metal stainless steel strip coil is used to produce 176mm×7mm continuous welded composite steel pipe.

[0030] First, place the 5mm base carbon steel strip coil and the 2.5mm multilayer metal stainless steel strip coil in the uncoiler and then enter the cleaning machine for cleaning to remove the surface oil and surface oxides on the surface to be composited; then send them to the composite pipe making unit Inner sub-welding pipe, at the same time, the brazing material foil strip with a thickness of 3 microns is uncoiled by an uncoiler and then placed between the carbon steel strip of the base metal and the stainless steel strip of the clad metal to make a continuous welded clad pipe , the continuous welded clad pipe is heated to 950°C by high frequency, and then directly enters the 12-pass horizontal and vertical continuous rolling mill, and an adjustable diameter ex...

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Abstract

The invention offers a producing way to heat roll and connect the metal complex tube, which contains the following craft: base metal tape, complex metal tape open; wash the complex surface; separately roll; heat roll to complex; cool and cut. The rolling temperature in the invention is 750-950 degC. The metal complex tube made by this way has good features of machine, antisepses and reproduce, so it has large application.

Description

technical field [0001] The invention relates to a method for manufacturing a metal composite pipe, in particular to a method for producing a continuously welded metal composite pipe by using brazing material. Background technique [0002] The application of metal composite pipes is mainly based on the purpose of economy and resource conservation, as well as special uses on various equipment. For example, it is more reasonable to use stainless steel pipes to manufacture pressure vessels and pipes that require corrosion resistance, but the cost is high; The thickness of the stainless steel pipe is only 2-10% of the overall thickness, which not only meets the corrosion resistance and high enough strength of the container, but also greatly reduces the cost. In addition, some metal materials with excellent heat resistance, corrosion resistance, electrical conductivity and thermal conductivity, such as copper, manganese, titanium or chromium, have the problem of scarcity of resou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/087B23P23/04
Inventor 严孟杰
Owner 吉欣(英德)热轧不锈复合钢有限公司