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Producing method of double-metal composite band

A manufacturing method and technology of composite strips, which are applied in metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of low cost, complicated process, and inability to popularize and apply.

Inactive Publication Date: 2003-11-05
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the above-mentioned methods are complex in process and increase the cost, and are not suitable for the production of low-cost and high-performance double-metal composite strips for common use. So far, they cannot be popularized and applied in industrial production.

Method used

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  • Producing method of double-metal composite band
  • Producing method of double-metal composite band
  • Producing method of double-metal composite band

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Example 1: Production of aluminum, steel, and aluminum three-layer composite tapes. The production process is as mentioned above. According to different product performance requirements, the metal composite surface is subjected to surface pretreatment and initial adsorption treatment respectively. The initial adsorption on the surface such as figure 2 As shown, spray N on the clean metal surface 2 . The rolling composite deformation is 10%-40%, using induction heating or direct current heating (the first and third methods), the heating temperature of the aluminum strip is 260-600℃, the temperature of the steel strip is 150-350℃, and the rolling speed is 0.2 ~0.5 m / sec, the tensile stress of the strip is 0.1 ~ 0.5σs. The composite belt is annealed in a bell-type annealing furnace with a protective atmosphere. The heat treatment system is: rising temperature 10-30°C / min, annealing temperature 280-600°C, annealing time 0.5-8 hours.

Embodiment 2

[0024] Example 2: Steel and stainless steel two-layer composite belt production: the production process is as described above. The width of the rolled composite strip is 300-500mm. The composite surface of the strip is subjected to surface pretreatment and initial adsorption treatment respectively. The tensile stress of the strip is 0.1~0.6σs, the deformation degree is 25%~40%, direct heating by high frequency (the second method), the current frequency is 440kHz, and the power 200-400kW, the heating temperature at the entrance of the deformation zone is 600-900℃, and the rolling speed is 0.2-0.5 m / s. The composite belt is annealed in a hood-type annealing furnace protected by hydrogen, the heating temperature is 700-900°C, and the holding time is 1-8 hours.

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Abstract

A method for manufacturing a bimetallic composite strip, comprising the steps of surface pretreatment, rolling composite, heat treatment of the composite strip, and the like. This method also adds surface initial adsorption after surface pretreatment, and nitrogen is sprayed on the clean metal surface to form a nitrogen adsorption film on the metal surface. The rolling compounding of this method adopts rapid electric heating and non-isothermal rolling compounding. This method has the advantages of simple process, convenient operation, significantly reduced cost, improved composite strength, favorable interface bonding, and improved reprocessing performance of the composite plate.

Description

Technical field [0001] The invention belongs to the field of metal processing, and particularly relates to a method for manufacturing a bimetal composite strip. Background technique [0002] As early as the 1950s, the American Metals and Controls Corporation invented the three-step solid phase composite technology of surface pretreatment (degreasing and brushing), rolling composite, and diffusion annealing. The success of this technology has promoted the development of bimetal composite technology. However, the surface-treated clean metal surface will quickly form a regenerated oxide film or adsorption film when it stays in the air for a short time, which increases the difficulty of interfacial bonding of dissimilar metals, and often requires more than 50% of a large deformation to achieve initial interfacial bonding. One-time large-deformation compounding not only puts forward higher requirements on the strength, stiffness and motor capacity of the compound rolling mill, but als...

Claims

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Application Information

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IPC IPC(8): B21B9/00B21B37/44B21B45/02B21B47/00
Inventor 于九明
Owner NORTHEASTERN UNIV
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