Temperature-controlled rolling technology of magnesium alloy coiled sheet

Abstract

The invention discloses a temperature-controlled rolling technology of magnesium alloy coiled sheets. The steps comprise: (1) performing heating compensation on a magnesium coiled sheet and uncoiling the magnesium coiled sheet; (2) performing sheet heating compensation and adjusting turning directions of the magnesium alloy sheets; (3) measuring tension of the sheet and controlling a crimp force value; (4) performing integrated temperature control on a part which is to bite into the sheet; (5) performing gradient temperature control on the width direction of the part which is to bite into the sheet; (6) through a temperature-controlled roll, performing finishing rolling on the sheet and the sheet deforming; (7) measuring tension of the sheet and controlling a crimp force; (8) performing sheet heating compensation and adjusting turning directions of the magnesium alloy sheets; (9) performing sheet heating compensation and coiling the sheet in rolls; (10) if the thickness of the magnesium plate coil sheet does not reach the thickness (t0) of a target magnesium plate, reversely repeating the steps (1)-(9) on magnesium coiled sheets on a reversible temperature-controlled rolling mill according to the process steps, performing next temperature-controlled finish rolling processing; (11) if the thickness of the magnesium sheet reaches the thickness (t0) of the target magnesium plate, obtaining the magnesium alloy coiled sheet satisfying the thickness requirements.

Description

technical field [0001] The invention relates to the technical field of a coil rolling production process, in particular to a temperature-controlled rolling production process of coiled magnesium alloy strips and ultra-thin strips. Background technique [0002] The development of lightweight technologies in the fields of aerospace, automobiles and rail transit has continuously increased the demand for metal materials other than traditional steel, especially thin strips and ultra-thin strips of metal materials such as aluminum alloys, titanium alloys, magnesium alloys, and high-silicon steels. increase. However, due to the characteristics of the organization and crystal structure of these materials, the rolling process and equipment required for coil production are very different from traditional steel materials. [0003] Due to its close-packed hexagonal structure, magnesium alloy materials are different from traditional steel materials, and their deformation temperature is ...

AI Technical Summary

Problems solved by technology

The disadvantages of this process method are: the energy utilization rate is low, and the continuous temperature control of the rolls during the rolling process cannot be guaranteed; the efficiency is low, and the rolling must be stopped every once in a while to reheat the roll surface; it is difficult to uniform Control the temperature distribution in the width direction of the roll surface

In addition, due to the low ignition point of magnesium alloy and other materials (especially the debris of magnesium alloy is very easy to burn), this combustion heating method has certain dangers in practical industrial applications.

Another method is to roll several other high-temperature metal materials first, heat the roller table and the surface of the roller, and then carry out magnesium alloy rolling. The disadvantage of this method is the same as the previous method, and it is also impossible to achieve temperature-controlled rolling It is difficult to meet the requirements of fine temperature control production

The above two methods of roll heating cannot achieve precise control of the roll temperature, so neither is temperature-controlled rolling in the true sense.

[0007] Chinese patent 2011100661204.1 discloses a hot-rolling and warm-rolling device and method for metal sheet and strip, and its similar Chinese patent 201110349952.0 discloses a device and method for hot-rolling and warm-rolling thin metal strips and ultra-thin strips. A method of wrapping the metal pipe frame in the circumferential direction of the roll and energizing it to realize the on-line heating of the roll by induction heating, but this method does not consider the temperature uniformity and temperature gradient control of the roll surface along the width direction of the roll; In the method, the rolled piece is not preheated, and the warm rolling is only realized by accepting the heat transfer of the roll, because the preheating temperature of the rolled piece cannot be controlled, so the real temperature-controlled rolling process cannot be realized.

[0009] To sum up, the existing technology has not been able to fully consider the precise temperature-controlled rolling process technical problems to be solved in the process of uncoiling, continuous rolling and coiling of magnesium coils, and they only focus on individual problems in the production process of magnesium alloy plates. Partially solved the technical problems related to the warm rolling of magnesium alloys, failed to comprehensively solve the key technical problems in the continuous rolling process of magnesium alloy strips, and lacked a technical solution for temperature-controlled rolling of magnesium alloy strips in coils

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