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Nonoriented magnetic steel sheet, member for rotary machine and rotary machine

An electromagnetic steel sheet, non-directional technology, applied in the direction of inorganic material magnetism, magnetic circuit characterized by magnetic material, metal rolling, etc., can solve the problems of different requirements and difficult to satisfy two characteristics

Inactive Publication Date: 2004-12-22
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In this way, even if it is the electromagnetic steel sheet used for the same motor, the required properties of the steel sheet used for assembling the rotor (hereinafter referred to as "rotor material") and the steel sheet used for assembling the stator (hereinafter referred to as "stator material") are the same. different, it is difficult to satisfy both characteristics at the same time

Method used

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  • Nonoriented magnetic steel sheet, member for rotary machine and rotary machine
  • Nonoriented magnetic steel sheet, member for rotary machine and rotary machine

Examples

Experimental program
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Effect test

Embodiment 1

[0129] A slab having the composition shown in Table 4 and the remainder being iron and unavoidable impurities was produced by the continuous casting method. In addition, the amounts of Ti, Nb, V, S, and O are reduced to the above-mentioned appropriate ranges. These slabs were heated at 1110° C. for 40 minutes, and then hot-rolled to obtain 2.5 mm hot-rolled sheets. The produced hot-rolled plate is pickled, descaled, and cold-rolled to produce a cold-rolled steel plate with a plate thickness of 0.50 mm. Next, finish annealing was performed at 780° C. for 10 seconds in an atmosphere having a capacity ratio of hydrogen:50% to nitrogen:50%. The semi-organic coating solution composed of dichromate and resin is coated on the finished annealed board, and fired at 300°C to make a product board.

[0130] In addition, the amount (number density) of ductile non-metallic inclusions that inhibit particle growth varies with changes in the thickness of the slab and changes in the rolli...

Embodiment 2

[0137] A continuously cast slab having a thickness of 210 mm having the composition shown in Table 6, the remainder being iron and unavoidable impurities was produced. In this process, by properly adjusting the composition of the slab in the steelmaking process and adjusting the rolling conditions, the amount of ductile non-metallic inclusions that hinder the growth of particles is kept at 1000 pieces / cm 2 the following range.

[0138] As in the case of Example 1, the produced slabs were treated to produce products and tested. The finish annealing of steel mark 58 is carried out at 680°C, and the finish annealing of steel mark 59 is carried out at 850°C.

[0139] The obtained results are shown in Table 7. As shown in Table 7, the samples with the composition and average grain size of the present invention all have good stress relief annealing crystal grain growth ratio and strength and magnetic properties, so they are suitable for simultaneous punching and manufacturi...

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Abstract

A nonoriented magnetic steel sheet which has a chemical composition in mass % wherein contents of Si and Mn are 0.1 to 1.2 % and 0.005 to 0.30 %, respectively, and the contents of C, Sol.Al and N are limited to 0.0050 % or less, 0.0004 % or less, and 0.0030 % or less, respectively, all including 0 %, and has a number density of grain growth inhibiting ductile non-metallic inclusions dispersed in the steel sheet of 1000 pieces / cm<2> or less including 0, wherein a grain growth inhibiting ductile non-metallic inclusion means an inclusion contained in a steel sheet having been subjected to finishing annealing which has a length of 3 x D to 9 x D, D representing an average particle diameter of re-crystallized grains in the steel sheet. The nonoriented magnetic steel sheet allows the production, from one steel sheet, of a rotor material exhibiting a high magnetic flux density and a high strength and a stator material exhibiting a high magnetic flux density and a low iron loss after it is subjected to strain removing annealing.

Description

technical field [0001] The present invention relates to a non-oriented electrical steel sheet for rotating machine assembly. The present invention also relates to a component for a rotating machine and a rotating machine assembled using the non-oriented electrical steel sheet. Background technique [0002] In order to reduce the energy consumption of the rotating machine, it is effective to increase the magnetic flux density of the iron cores of the rotating machine, that is, the rotor and the stator, and at the same time reduce the iron loss of these iron cores. As a measure to reduce iron loss, it is generally possible to increase the content of Si, Al, Mn, etc. to increase the resistance of the core material. In addition to these measures, known methods include, for example, the method of adding B disclosed in JP-A-58-151453, the method of adding Ni disclosed in JP-A-3-281758, and the like. Also, by making the collective organization of the electromagnetic steel plate, ...

Claims

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Application Information

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IPC IPC(8): B21B3/02C21D8/12C22C38/00C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/60H01F1/16H02K1/02
CPCC22C38/002C22C38/02C22C38/004C22C38/12H02K1/02C22C38/04C21D2211/004C22C38/60C21D8/12H01F1/16
Inventor 中西匡高宫俊人河野正树
Owner JFE STEEL CORP
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