A kind of high-strength copper-containing cold-rolled non-oriented silicon steel and manufacturing method

A technology of oriented silicon steel and a manufacturing method, applied in the field of steel processing, can solve the problems of high frequency iron loss, difficult realization of thin plate casting and rolling technology, etc., and achieve the effect of simple production process and strong process versatility
CN107130169BActive Publication Date: 2018-05-18UNIV OF SCI & TECH BEIJING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF SCI & TECH BEIJING
Publication Date
2018-05-18

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Abstract

The invention provides high-strength copper-contained cold-rolled non-oriented silicon steel and a manufacturing method, and belongs to the technical field of steel and iron machining. The silicon steel comprises the following components: 0.001-0.0015 wt.% of C, 2.5-3.0 wt.% of Si, 0.8-1.0 wt.% of Al, 0.5-0.8 wt.% of Mn, 1.5-2.0 wt.% of Cu, 0.75-1.5 wt.% of Ni, no more than 0.005 wt.% of Nb, and the balance of Fe and inevitable impurities; and through control of secondary cold rolling reduction, an annealing process and an aging process, the magnetic induction strength, the iron loss and the yield strength of the non-oriented silicon steel are balanced. After the steel is coldly rolled, annealed and aged, the magnetic induction strength B50 is 1.64-1.66 T, the iron loss W1.0 / 50 is 2.5-3.5 W / kg, W1.0 / 400 is 20.04-25.04 W / kg, the lower yield strength ReL is 750-810 MPa, the tensile strength Rm is 800-870 MPa, and the ductility is 15-20%; and the silicon steel reaches and exceeds the performance requirements of common high-strength non-oriented silicon steel.
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Description

technical field

[0001] The invention relates to the technical field of steel processing, in particular to a high-strength copper-containing cold-rolled non-oriented silicon steel and a manufacturing method thereof. Background technique

[0002] In recent years, with the rapid development of new energy vehicles, the performance requirements of non-oriented silicon steel as the core material of drive motors and micro motors are higher. As a high-efficiency drive motor, it needs to meet high-speed rotation and obtain high torque, and at the same time, it needs to ensure high magnetic induction intensity and low high-frequency iron loss. Therefore, in actual production and use, the drive motor is required to be stronger than traditional non-oriented electrical steel by more than 200 MPa, and it is necessary to ensure that its excellent magnetic properties cannot be damaged while increasing the strength.

[0003] So far, the goal of improving non-oriented magnetic induction is m...

Claims

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