Preparing method for spliced combined structure composite metal sheet and composite metal sheet of preparing method

Abstract

The invention discloses a preparing method for a spliced combined structure composite metal sheet and the composite metal sheet of the preparing method. At least two kinds of heterogeneous metal materials are subjected to solid-phase composition, and a non-side-face composite structural layered composite initial blank is obtained; the layered composite metal initial blank is subjected to plastic forming machining, straightening and cutting treatment, and a non-side-face composite structural layered composite metal long strip is manufactured; a slicing type cutting technology is adopted on the obtained non-side-face composite structural layered composite metal long strip, and multiple composite metal sheet blanks are manufactured; and the composite metal sheet blanks are subjected to machining and surface treatment, and the composite metal sheet is formed. The manufactured spliced metal sheet is formed in the manner that at least two kinds of metal sheets are tightly combined through mutual contact side faces in a firm physical metallurgy bonding manner. The spliced composite metal sheet has more reliable welding characteristics, and the production cost is obviously reduced while the performance requirements for good electric conduction, heat dissipation, weight reduction, transition connection and the like of overall parts are met.

Description

technical field [0001] The patent of the invention relates to a preparation method of a composite metal sheet with a combined structure and the composite metal sheet, which can be widely used in electric power, batteries, automobiles, electronics and other industrial fields. Background technique [0002] At present, in the electric power, battery, automobile, electronics and other industrial fields, a large number of metal parts of different materials need to be paired and connected, such as bus bars, positive and negative connections of multiple single cells, automotive structural parts, packaged heat sinks, etc. For example, aluminum has the characteristics of relatively abundant resources, low density, and good electrical conductivity and heat dissipation. At the same time, its low strength and difficult welding (including soldering tin and difficulty in welding with other non-aluminum metals) limit its larger-scale use. Therefore, the reliable connection design between a...

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Problems solved by technology

Therefore, the patent No. 200910110705.8 "a conductive connecting piece of a side composite metal structure and its production method" proposes a scheme for a conductive connecting piece punched out laterally by a side composite metal strip made of different metals, but especially for Similar to the combination of light metal materials such as aluminum, magnesium, titanium, lithium and other heterogeneous materials under the condition of thermal diffusion, it is easy to form intermetallic compounds. Engineering practice shows that such combination materials should directly prepare plates and strips with side composite structures. The processing technology is quite difficult: on the one hand, when continuous high-energy beams (such as lasers and electron beams) are used to directly act on the contact sides of heterogeneous metals, the instantaneous high-temperature diffusion makes it easy to generate intermetallic compounds between the two materials and directly destroy the bonding of the interface. ; On the other hand, even if the rolling composite process is adopted, when the dissimilar metal strips enter the rolling mill side by side, the sides that are in contact with each other mainly form a fresh bonding interface through the horizontal extrusion force generated by limiting the material width in the rolling deformation zone Obviously, generally speaking, the dimension of the width direction of the metal strip is much larger than the dimension of the thickness direction. At this time, the extrusion force in the horizontal direction of the strip is actually prone to stiffness instability at the interface to be bonded, that is, the necessary interface bonding. The energy is difficult to introduce, resulting in recombination failure

All of these make the preparation and application of side clad metal strips combined with light metal and other materials and their conductive connecting pieces difficult to be widely promoted.

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