A method of applying induction normalizing to prepare laminated materials with grain gradient

Abstract

The invention provides a method for preparing a laminated material with a grain gradient by using induction normalizing, comprising the following steps: using induction heating to partially normalize the surface of the steel plate, keeping it warm, and air cooling to room temperature to obtain a steel plate; Heating to the recrystallization zone, and then rolling the steel plate, each time the rolling pressure is 0.7-1.2mm, and the total pressure is 60-90%, to obtain the final rolled steel plate; the final rolled steel plate is recrystallized as a whole Annealing heat treatment, the temperature is 30-50°C above Ac3 or Acm, heat preservation, cooling with the furnace, to obtain laminated materials. The invention utilizes the method of induction heating, adopts appropriate heating process parameters, and sequentially induces normalizing treatment on the front and back sides of the steel plate, and then undergoes rolling treatment and recrystallization annealing, and realizes the high-strength plastic product without relying on alloying. The laminated material with grain gradient solves the problems of high cost, complicated equipment and difficult organization regulation in the prior art.

Description

technical field [0001] The invention belongs to the technical field of laminated material preparation, and in particular relates to a method for preparing laminated materials with grain gradients by applying induction normalizing. Background technique [0002] Lightweight and high safety are the basic requirements for materials of modern transportation and other high-end equipment and basic components. Lightweight can be achieved by increasing the strength of the material and reducing the density of the material; while high safety requires the material to have high strength and high toughness, so as to avoid the large deformation caused by the low strength of the parts during the collision or the sudden failure of the service due to insufficient toughness. Fractures cause catastrophic accidents. [0003] For decades, by continuously adding various alloying elements to steel, according to the transformation-induced plastic deformation effect (TRIP), twin crystal-induced plas...

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Problems solved by technology

[0005] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a method of applying induction normalizing to prepare laminated materials with grain gradients, using the method of induction heating, adopting suitable heating process parameters, and sequentially heating the front and back of the steel plate Double-sided induction normalizing treatment, followed by rolling treatment and recrystallization annealing, realizes a laminated material with high strength and plastic product without relying on alloying, which solves the high cost, complicated equipment and structure control of the existing technology Difficulty and other issues

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