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A DC casting device and method for producing steel-aluminum composite pipes

A technology for steel-aluminum composite pipes, applied in the field of DC casting devices for the production of steel-aluminum composite pipes, which can solve the problems of low bonding strength at the matrix/composite layer interface, difficulty in ensuring the metallurgical quality of the composite layer, and long procedures for the extrusion composite method. Achieve the effects of guaranteed eccentricity, high productivity, and simple production equipment

Active Publication Date: 2017-12-01
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extrusion composite method has a long process and low productivity and yield. In recent years, some people have used cold spraying or thermal spraying methods to produce composite pipes, but the composite pipes prepared by this method have low bonding strength at the matrix / composite layer interface and low productivity. , the metallurgical quality of the composite layer is not easy to guarantee

Method used

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  • A DC casting device and method for producing steel-aluminum composite pipes
  • A DC casting device and method for producing steel-aluminum composite pipes
  • A DC casting device and method for producing steel-aluminum composite pipes

Examples

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Effect test

Embodiment 1

[0033] A DC casting device for producing steel-aluminum composite pipes, such as figure 1 As shown, 1. Fixed end, 2. Guide rod, 3. Guide slider, 4. Steel pipe, 5. Hot top, 6. Aluminum or aluminum alloy melt, 7. Graphite ring, 8. Crystallizer, 9 , Steel-aluminum composite pipe, 10, dummy block, 11 spray holes.

[0034] The affiliated device includes a guide bar 2, a guide slider 3, a hot top 5, a graphite ring 7, a crystallizer 8 and a dummy block 10. The guide slider 3 is inserted on the guide bar 2, and the hot top 5 is located on the crystal Directly above the crystallizer 8, the hot top 5 is fixed on the crystallizer 8 by pressing rods; the graphite ring 7 is embedded on the inner wall of the crystallizer 8 by thermal packing, and the dummy block 10 is arranged directly below the crystallizer 8, and The dummy block is fixed on the platform of the casting machine, and the upper end of the guide bar 2 has a connecting screw hole for connecting the fixed end 1 .

[0035] The...

Embodiment 2

[0050] A DC casting device for producing steel-aluminum composite pipes. The structure of the device is the same as in Embodiment 1, except that the length of the guide bar is 4.1 m, and the guide slider is made of A3 steel.

[0051] The DC casting method for producing steel-aluminum composite pipes by using the above-mentioned device comprises the following process steps:

[0052] (1) The outer surface of the 16Mn low-alloy structural steel with a size of 1.5mm×Φ80mm×4m is derusted and polished in sequence until the fresh metal surface is exposed, and all the treated steel is immersed in flux, and the temperature is 90°C for 5 minutes. Take it out and cool naturally until the outer surface of the steel pipe forms a hoarfrost coating;

[0053] The interval between (2) and step (1) should not exceed 4 hours. Insert the flux-coated pipe into the crystallizer and seat on the dummy block, insert the guide slider into the guide rod, the slider contacts the pipe and keep the pipe v...

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Abstract

The invention provides a DC casting device and method for producing a steel / aluminum composite pipe. The device comprises a guide leading rod, a guide sliding block, a hot top, a graphite ring, a crystallizer and a dummy ingot block. The method includes the technological steps that (1) the outer surface of a steel pipe is coated with soldering flux; (2) the pipe coated with the soldering flux is inserted into the device; (3) aluminum or aluminum alloy liquid is lead in the device to be cast; and (4) casting is stopped after the tail of the steel pipe enters and passes through the hot top. Compared with a traditional method, the DC casting method for producing the steel / aluminum or aluminum alloy composite pipe through the device has the beneficial effects that no air hole looseness or inclusion exists in steel / aluminum or aluminum alloy composite interfaces, the interface bonding strength is high, conductivity is high, a composite layer is compact, and the accuracy of the composite pipe is high; and production equipment and the technology are simple, productivity is high, the interface resistance of the prepared steel / aluminum composite pipe ranges from 0.240 milliohm to 0.340 milliohm, and the interface shear strength of the prepared steel / aluminum composite pipe ranges from 24.6 Mpa to 28.6 Mpa.

Description

technical field [0001] The invention relates to a DC casting device and method, in particular to a DC casting device and method for producing steel-aluminum composite pipes. Background technique [0002] Composite materials can give full play to the advantages of each component to form new materials with high comprehensive performance, among which layered composite materials are the most widely used in industry. Layered composite metal materials are mostly sheets, which are mainly produced by rolling composite methods. Recently, casting composite technology has also appeared, which can produce composite ingots of the same but different alloys to roll composite sheets. Most of the composite pipes are produced by extrusion composite method, and the high temperature and high pressure during extrusion are used to form a metallurgical bond of each component. However, the extrusion composite method has a long process and low productivity and yield. In recent years, some people ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16
CPCB22D19/0081B22D19/16
Inventor 崔建忠张海涛
Owner NORTHEASTERN UNIV LIAONING
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