A kind of grain-oriented silicon steel with self-adhesive performance and its preparation method

Abstract

A self-adhesive oriented silicon steel, its components and wt% are: C: 0.015-0.095%, Si: 2.80-3.60%, Als: 0.020-0.035%, N: 0.0050-0.0100%, Mn: 0.010 ~1.00%, S: 0.0030~0.03%. Preparation method: cast into billets after smelting; low-temperature or high-temperature hot rolling; coiling after conventional cooling; normalization; one-time cold rolling; decarburization annealing; nitriding treatment; Conventional high-temperature annealing; stretching and flattening annealing; coating organic self-adhesive insulating coating containing epoxy resin mixed with latent curing agent and conventional drying. Under the premise of ensuring the magnetic induction intensity B800≥1.80T, P17≤1.60W / kg, and T-type peel strength≥0.50N / mm, the present invention eliminates the magnesium silicate layer and coats the organic insulating coating containing epoxy resin to obtain Self-adhesive performance, and the punching performance, that is, the number of punching pieces of the blade die at one time, is 5 to 12 times higher than that of the existing technology.

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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