Current assisted vacuum rolling method for preparing metal composite plate

Abstract

The invention relates to a current assisted vacuum rolling method for preparing a metal composite plate. The current assisted vacuum rolling method for preparing the metal composite plate specificallycomprises the steps that firstly, surface oxide layer removing treatment, surface fresh metal exposing treatment and surface oil contamination removing treatment are carried out on each tailored plate; then, the plates which are sequentially overlapped are subjected to sealing welding treatment, and air between composite plate assemblies is pumped to guarantee that plate contact surfaces cannot be oxidized when the plate contact surfaces are subjected to the pulse current action; next, the composite plate assemblies are put into a rolling mill, a pulse current is input to segments to be machined of the composite plate assemblies through an electric contact device, electrical plastic rolling bonding is carried out, multi-pass rolling is carried out by controlling the pulse current parameters and the rolling reduction rate, and the total reduction rate is 58%-72%; and after rolling, the appropriate homogenizing annealing temperature is selected according to the differences of the platesto treat the composite plate 30 min to 3 h. The current assisted vacuum rolling method for preparing the metal composite plate has the beneficial effects of being low in cost and energy consumption,high in plate bonding strength and especially suitable for rolling a titanium alloy, a nickel-cobalt high-temperature alloy, high-strength steel and other refractory materials at a relatively low temperature to prepare the composite plate.

Description

technical field [0001] The invention relates to a method for preparing a metal composite plate by current-assisted vacuum rolling, and belongs to the comprehensive technical field of metal composite materials and mechanical manufacturing. Background technique [0002] At present, the production methods of metal composite panels at home and abroad mainly include: explosive composite method, diffusion welding method, vacuum rolling composite method, etc. Due to the limitations of the thickness of the processing plate, the defects of the composite plate, the serious environmental pollution, the low degree of automation, and the high energy consumption of the explosive cladding method, its widespread use is severely limited; although the diffusion welding method is simple in process, the formed clad plate The strength is generally not high; the vacuum rolling composite method is developed from the ordinary hot rolling technology. In this composite method, the interface of the co...

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Problems solved by technology

Although this method solves the composite strength of the composite board very well, the composite billet needs to be heated to a high temperature of about 1,000 degrees Celsius, which takes a long time to heat, and the preparation process is cumbersome, and the production cost and equipment requirements are high.

Especially for hard-to-deform materials such as titanium alloys, nickel-cobalt superalloys, and high-strength steels, they need to be heated to thousands of degrees Celsius, which requires high production costs and equipment, so large-scale applications have not yet been realized.

[0004] Aiming at the disadvantages of the prior art, the metal plate rolling method combined vacuum rolling and electroplastic rolling adopted in the present invention overcomes the high composite temperature of common hot rolling, the poor processing plasticity, the grain growth of metal materials, and the surface Disadvantages such as easy oxidation

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