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Preparation method for achieving strong metallurgical bonding on dissimilar metal interface

A technology for metallurgical bonding and dissimilar metals, applied in metal rolling and other directions, can solve the problems of no diffusion effect at the interface of dissimilar metals, weak metallurgical bonding at the interface of dissimilar metals, and low interface bonding strength, etc. Low, short cycle effect

Active Publication Date: 2018-11-16
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during cold rolling and compounding, there is almost no diffusion effect at the interface of dissimilar metals, and it is difficult to achieve complete metallurgical bonding
Therefore, a long time (generally about 10 hours, or even longer) high-temperature diffusion heat treatment is often applied after cold rolling and compounding, so that atomic diffusion occurs at the interface of dissimilar metals to realize the metallurgical bonding of the interface; the existence of the long-time diffusion heat treatment process can not only The consumption is large, the cycle is long, and it is easy to generate brittle intermetallic compounds at the interface of dissimilar metals, resulting in a weak degree of metallurgical bonding at the interface of dissimilar metals, and the interface bonding strength is not high, which seriously affects the development and production of dissimilar metal composite materials prepared by cold rolling composite method. application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Parallel to the length direction of the pure aluminum slab and the pure copper slab, mechanically grind the surface of the cleaned pure aluminum slab and pure copper slab at room temperature for 1 minute; Aluminum slabs and pure copper slabs are laminated to form a combined slab; then within 5 minutes, the combined slab is sent to a rolling mill with tension at the entrance and exit for room temperature rolling to obtain a composite slab whose interface is mechanically bonded; then heated The composite slab is heated in the furnace at 520°C for 10 minutes for a short time; finally, within 1 minute, the heated composite slab is sent to a rolling mill with tension at the exit for high-temperature rolling to obtain a strong metallurgical bond at the interface. Pure copper / pure aluminum / pure copper composite sheet.

Embodiment 2

[0021] Parallel to the length direction of the 1060 pure aluminum slab and the 6061 aluminum alloy slab, the surface of the 1060 pure aluminum slab and the 6061 aluminum alloy slab to be composited are mechanically polished at room temperature for 10 minutes; Layers of 1060 pure aluminum slabs and 6061 aluminum alloy slabs are laminated to form a combined slab; then the combined slab is sent to a rolling mill with tension at the entrance and exit for room temperature rolling within 15 minutes to obtain a composite plate with a mechanically bonded interface Then, the composite slab is heated in a heating furnace at 550°C for 40 minutes for a short time; finally, within 5 minutes, the heated composite slab is sent to a rolling mill with tension at the exit for high-temperature rolling to obtain an interface 1060 pure aluminum / 6061 aluminum alloy composite plate that realizes strong metallurgical bonding.

Embodiment 3

[0023] Parallel to the length direction of Q235B carbon steel slabs and pure aluminum slabs, mechanically grind the surface of Q235B carbon steel slabs and pure aluminum slabs with clean surfaces at room temperature for 2 minutes; The slab and the pure aluminum slab are stacked to form a combined slab; then within 5 minutes, the combined slab is sent to a rolling mill with tension at the entrance and exit for room temperature rolling to obtain a composite slab with a mechanically bonded interface; then in a heating furnace The composite slab is heated at 480°C for 40 minutes for a short time; finally, within 2 minutes, the heated composite slab is sent to a rolling mill with exit tension for high-temperature rolling to obtain a Q235B with a strong metallurgical bond at the interface Carbon steel / pure aluminum composite panels.

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Abstract

The invention relates to a preparation method for achieving strong metallurgical bonding on a dissimilar metal interface and belongs to the technical field of dissimilar metal composite materials. Thepreparation method is characterized in that the high performance dissimilar metal composite material achieving strong metallurgical bonding on the interface is obtained by fully exerting the advantages of existing hot rolling composite method and cold rolling composite method and overcoming the defects of the methods, combining steps of polishing, laminating, room temperature rolling, short-timeheating, high-temperature rolling and the like and controlling times and temperatures in the preparation process of the dissimilar metal composite material cooperatively. The preparation method provided by the invention has the advantages that the preparation method is simple in process, low in energy consumption, short in period, less in equipment investment, low in cost and high in efficiency, and can achieve strong metallurgical bonding on the dissimilar metal interface by using existing polishing equipment, heating furnace and rolling mills (one rolling mill or arbitrarily arranged two rolling mills); compared with the interfacial bonding strength of the dissimilar metal composite material prepared by the existing hot rolling composite method and cold rolling composite method, the interfacial bonding strength is improved by over 20-50%, and the application range of the high performance dissimilar metal composite metal is wider.

Description

technical field [0001] The invention belongs to the technical field of preparation of dissimilar metal composite materials, and in particular relates to a preparation method for realizing strong metallurgical bonding at dissimilar metal interfaces. Background technique [0002] Through the combination of dissimilar metals, giving full play to the advantages of each component metal, obtaining excellent comprehensive properties that a single metal does not have, and developing high-performance dissimilar metal composite materials is one of the research hotspots and important development trends in the frontier field of new materials. [0003] At present, the bonding methods of dissimilar metal interfaces mainly include metallurgical bonding and mechanical bonding. Metallurgical bonding refers to the bonding formed by interdiffusion of atoms between the interfaces of dissimilar metals, and mechanical bonding refers to the bonding formed between the interfaces of dissimilar metal...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B3/00
CPCB21B1/38B21B3/00B21B2001/386
Inventor 刘雪峰石章智白于良张丹丹王浩杨智研
Owner UNIV OF SCI & TECH BEIJING
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