Oriented silicon steel with self-bonding performance and preparation method thereof

Abstract

The invention provides oriented silicon steel with self-bonding performance. The oriented silicon steel comprises the following components in percentage by weight: 0.015%-0.095% of C, 2.80%-3.60% of Si, 0.020%-0.035% of Als, 0.050%-0.0100% of N, 0.010%-1.00% of Mn, and 0.0030%-0.03% of S. The preparation method comprises the following steps of casting to form a blank after smelting; performing low-temperature or high-temperature hot rolling; rolling after conventional cooling; normalizing; carrying out primary cold rolling; performing decarburizing annealing; performing nitriding treatment; coating with a high-temperature annealing isolator to remove a magnesium silicate bottom layer; performing conventional high-temperature annealing; drawing, smoothing and annealing; and coating with organic self-bonding insulated coating containing epoxy resin and mixed with a latent hardener and performing conventional drying. On the premise of ensuring that the magnetic induction intensity B800 islarger than or equal to 1.80 T, P17 is smaller than equal to 1.60 W / kg, and the T-peeling strength is higher than or equal to 0.50 N / mm, by removing the magnesium silicate layer and coating with theorganic insulated coating containing the epoxy resin, the self-bonding performance is obtained, and the punching performance, that is the one-time punching quantity of an edge die, is improved by 5-12times in comparison with the prior art.

Description

technical field [0001] The invention relates to a cold-rolled oriented silicon steel and a preparation method thereof, specifically belonging to an oriented silicon steel with self-adhesive performance and a preparation method thereof. Background technique [0002] In the manufacturing process of generator motors, in order to improve the iron loss of the iron core and reduce the energy consumption of the product, the customer plans to develop and use oriented silicon steel instead of non-oriented silicon steel to manufacture the stator core, so as to improve the magnetic permeability of the yoke and teeth. In terms of magnetic performance, it is required that the typical magnetic induction design value can reach more than 1.7T, so that the grain-oriented silicon steel has complete advantages. In terms of mechanical properties, the rolling tensile strength is required to reach 350N / mm2, and the bigger the better, so the thicker the grain-oriented silicon steel is (the higher ...

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Problems solved by technology

Although this document can provide a production method of low-temperature high-magnetic-induction grain-oriented silicon steel that reduces the fluctuation of the iron loss curve, it adopts a rolling process of low-temperature hot rolling and nitriding treatment, but it also does not control the interface between the coating and the steel base. The existing problems are solved (the surface is the traditional oriented silicon steel magnesium silicate bottom layer + T2 tension coating mode, which is not conducive to stamping processing and has no self-adhesiveness)

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