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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

Active Publication Date: 2018-05-18
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the mechanical properties and magnetic induction strength of this patent are high, the high frequency iron loss is high and the thin plate casting and rolling technology is difficult to realize in the original industrial production

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The chemical composition (by mass percentage) is: 0.0013% C, 0.53% Mn, 0.80% Al, 2.84% Si, 0.0030% N, 0.0027% Nb, 0.0018% S, 0.0045% P, 1.8% Cu, 1.2% Ni, The rest is iron and unavoidable impurities.

[0028] After being held at 1150°C for 1.5h, the forged billet was rolled for 7 passes through the rolling mill. The total reduction rate was 94%, the reduction rate for each pass was 31%, and the final rolling temperature was 870°C. Keep the temperature at 650°C for 1 hour and then cool with the furnace. Then the hot-rolled sheet was dried at 980°C and 100% N 2 Incubate for 5 min under a protective atmosphere and take it out to cool to room temperature. After the normalized sheet is pickled to remove the scale, it is cold-rolled to 0.5mm, and then the cold-rolled sheet is dried at 850°C and 25%H 2 +75%N 2 Insulate for 3 min under a protective atmosphere, then remove and air cool to room temperature. The annealed sheet is subjected to a second cold rolling to 0.35mm, a...

Embodiment 2

[0031] The chemical composition (by mass percentage) is: 0.0015% C, 0.62% Mn, 0.91% Al, 2.92% Si, 0.0030% N, 0.0025% Nb, 0.0018% S, 0.0045% P, 1.5% Cu, 0.8% Ni, The rest is iron and unavoidable impurities.

[0032] After the forged billet is heated at 1150°C, it is rolled through the rolling mill for 7 passes, the total reduction rate is 94%, the reduction rate of each pass is 31%, the final rolling temperature is 870°C, and then the hot-rolled sheet is rolled at 600°C Under the condition of heat preservation for 1h, it was cooled with the furnace. Then the hot-rolled sheet was dried at 1030°C and 100% N 2 Insulate for 3 minutes under a protective atmosphere and then take it out to air-cool. After the normalized sheet is pickled to remove the scale, it is cold-rolled to 0.5mm, and then the cold-rolled sheet is dried at 800 ° C and 25% H 2 +75%N 2 Insulate for 5 minutes under a protective atmosphere, then take it out and cool it to room temperature. Then the annealed plate...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/16C22C38/08C22C33/04C21D8/12
CPCC21D8/1222C21D8/1261C21D8/1266C22C33/04C22C38/02C22C38/04C22C38/06C22C38/08C22C38/16
Inventor 罗海文黄俊
Owner UNIV OF SCI & TECH BEIJING
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