CN104575912A

CN104575912A - High-saturation magnetic intensity, low-consumption, stress-resistant and high-rigidity magnetically soft alloy

Info

Publication number: CN104575912A
Application number: CN201410851004.0A
Authority: CN
Inventors: 雷成辉; 陈岳; 王兵
Original assignee: BEIJING BEIYE FUNCTIONAL MATERIALS Corp
Current assignee: BEIJING BEIYE FUNCTIONAL MATERIALS Corp
Priority date: 2014-12-31
Filing date: 2014-12-31
Publication date: 2015-04-29

Abstract

The invention provides high-saturation magnetic intensity, low-consumption, stress-resistant and high-rigidity magnetically soft alloy, and belongs to the technical field of magnetically soft materials. The alloy is prepared from following chemical components in percentage by mass: 43.0 to 45.0% of nickel, 0.001 to 0.02% of carbon, 0.001 to 0.20% of silicon, 0.001 to 0.40% of manganese, less than 0.015% of sulphur, 0.01 to 0.5% of one or a plurality of molybdenum, copper, chromium and vanadium, and the balance of iron and inevitable impurities. The magnetically soft alloy can be prepared by melting though a vacuum induction furnace and general heat processing and cold processing; the magnetically soft alloy can be prepared into bars and belts and have the characteristics of being high in saturation magnetic intensity, low in consumption, stress resistant and high in rigidity after heat processing; the initial magnetic conductivity Mu0 of 0.1 to 0.3mm belt is not less than 8.0mH/m, the maximum magnetic conductivity Mu m is not less than 100mH/m, the saturation magnetic intensity Bs is not less than 1.56T, and the consumption P (0.7/ 3KHZ) is not greater than 30W/Kg; the initial magnetic conductivity Mu0 of the bar is not less than 7.0mH/m, the maximum magnetic conductivity Mu m is not less than 90mH/m, the coercivity Hc is not greater than 8A/m, and the saturation magnetic intensity Bs is not less than 1.56T.

Description

The non-retentive alloy of high saturated magnetic strength, low-loss, proof stress, good rigidity

Technical field

The invention belongs to soft magnetic materials technical field, particularly relate to the non-retentive alloy of high saturated magnetic strength, low-loss, proof stress, good rigidity.

Background technology

Along with the development of electronics, communication, industrial automation technology, more and more higher to the requirement of non-retentive alloy, alloy has good alternating current characteristic not only to require the DC performance of alloy also to require, and has good stable performance characteristic and physical strength in a state of use.In traditional non-retentive alloy, though FeCo series has high saturation induction density, permeability is on the low side again, and cost is very high; FeAl, FeCr series the saturated magnetic strength of non-retentive alloy and magnetic permeability lower, in FeNi non-retentive alloy, middle nickel non-retentive alloy has high saturated magnetic induction, but it is not high that alloy generally exchanges performance, and exchanging the nickelic non-retentive alloy that performance is good, loss is low, its saturated magnetic strength is low again, proof stress poor performance, require high to using state, be only applicable to static lower use.But along with the expansion of non-retentive alloy Application Areas, in use need non-retentive alloy device to bear certain stress, at this moment stress not only causes the decay of non-retentive alloy performance but also uses because the rigidity of material causes part deformation to affect not.In sum, study and a kind ofly there is high saturated magnetic induction, low-loss, proof stress and the novel non-retentive alloy of good rigidity to meet the needs of growing industrial automation technology development.

Summary of the invention

The object of the present invention is to provide the non-retentive alloy of high saturated magnetic strength, low-loss, proof stress, good rigidity.Non-retentive alloy provided by the invention, overcome existing alloy there is the decay of non-retentive alloy performance in the application but also cause the defect of part deformation not because of the rigidity of material, the service requirements to the higher magnetic of material, rigidity or communication environment under some specified conditions such as electronics, communication can be better met.

The design of alloy scheme that the present invention relates to is: control between 43.0 ~ 45.0% by nickel (massfraction, %) content, ensure that alloy has high saturation induction density; Carbon 0.001 ~ 0.02%, silicon 0.001 ~ 0.20%, manganese 0.001 ~ 0.40%, by the control to carbon, silicon, Fe content, suppress the gas content of alloy, reduce the generation of oxide compound, carbide; Sulphur is less than 0.015%, to reduce the impact that alloy causes magnetic because of sulfide; Simultaneously containing one or more in 0.01 ~ 0.5% molybdenum, copper, chromium, vanadium, by adding the magnetic property that the elements such as a small amount of molybdenum, copper, chromium, vanadium suppress ordered structure, control thermal treatment process, improve alloy, put forward heavy alloyed rigidity and compressive property.

The chemical composition of the non-retentive alloy of the saturated magnetic strength of height of the present invention, low-loss, proof stress, good rigidity is (massfraction, %) nickel 43.0 ~ 45.0%, carbon 0.001 ~ 0.02%, silicon 0.001 ~ 0.20%, manganese 0.001 ~ 0.40%, sulphur is less than 0.015%, also comprise in 0.01 ~ 0.5% molybdenum, copper, chromium, vanadium one or more, all the other are iron and inevitable impurity.

Mo, Cu, Cr, V that this alloy comprises are no more than 0.5wt% at most.

The present invention makes the in-fighting Q of alloy bar material ^-1be less than or equal to 2 × 10 ^-3.

Non-retentive alloy provided by the invention can adopt vacuum induction furnace smelting mode and conventional hot-work, cold working preparation and obtaining.Bar, band can be processed into, through thermal treatment, there is the characteristics such as high saturated magnetic strength, low-loss, proof stress, good rigidity.Wherein 0.1 ~ 0.3mm band initial permeability μ ₀>=8.0mH/m, maximum permeability μ _m>=100mH/m, elastic magnetic inductivity μ ' _1KHZ>=6.0mH/m, μ ' _3KHZ>=5.0mH/m, saturation induction density Bs>=1.56T, loss P _(0.7/3KHZ)≤ 30W/Kg; Bar: μ ₀>=7.0mH/m, maximum permeability μ _mat>=90mH/m, coercivity H≤8A/m, saturation induction density Bs>=1.56T, 300 ~ 500K temperature, in-fighting Q ^-1≤ 2 × 10 ^-3.

Non-retentive alloy provided by the invention is preferred preparation method comprise the steps:

1, smelt: Ni plate, Si block, Mn block, C grain are put into vacuum induction furnace with one or more and the Fe block in micro-Mo, Cu, Cr, V and smelted into steel ingot;

2, conventional forging and hot-rolling method processed finished products is adopted to forge rod or forging stock, if need forging stock can be rolled into the torrid zone through hot rolls;

3, cold rolling: different thickness finished product is processed into through cold-rolling mill, preferably 0.1 ~ 0.3mm thickness in the torrid zone.

4, thermal treatment: standard (GB) sample is put into heat treatment furnace; hydrogen or vacuum protection is adopted to carry out 1 heating, insulation, cooling process; the internal stress produced in the elimination alloy course of processing, removal impurity, uniform formation, the characteristic required for acquisition.

The novel non-retentive alloy preparation method of the saturated magnetic strength of above-mentioned height, low-loss, proof stress, good rigidity, in heat treatment step, Heating temperature is 1120 DEG C ~ 1200 DEG C, soaking time is 4 ~ 8 hours, cool with 100 ~ 250 DEG C/h speed, be cooled to 500 DEG C ~ 600 DEG C, then continue to be cooled to 20 ~ 200 DEG C with the cold true speed being not less than 400 DEG C/h and come out of the stove.

Non-retentive alloy provided by the invention had not only had high saturated magnetic induction, low-loss but also had possessed the feature of proof stress, good rigidity.Wherein band (thickness 0.1 ~ 0.3mm) performance is in table 1; Performance test is in table 2

Table 1 band performance

Alloy is frequency sweeping within 1000Hz, acceleration 1 ~ 10g vibration after, μ ^'velocity of variation < 5%.

Table 2 performance test

The advantage that non-retentive alloy provided by the invention has relative to prior art is: can meet the AC and DC magnetic property that alloy is good, and alloy can be made again to have, and loss is low, the characteristic of anti-vibration, good rigidity; By rational chemical composition, give full play to each alloys producing, adopt vacuum induction melting technique, produce the type material of a kind of high saturated magnetic strength, low-loss, proof stress, good rigidity, stable performance.

Embodiment

Technical scheme of the present invention is further illustrated below by embodiment.

Embodiment 1:

Composition (wt%) is the alloy of C 0.003%, Si 0.08%, Mn 0.36%, Ni 43.23%, Cr more than 0.15%, Mo0.2%, Cu0.15% Fe.Smelt in vacuum induction furnace, through 1200 DEG C of heating, forge hot becomes 40 × 200mm forging stock, is rolled into 5 × 210mm torrid zone after figuring of surface, then through being cold worked into 0.25mm strip.Material heat treatment system: 1180 DEG C × 5h, is cooled to 550 DEG C to be as cold as room temperature soon with the cooling rate of 200 DEG C/h and comes out of the stove, and H2 protects.Obtain as following table 3 performance:

Table 3

After acceleration 10g vibrates, μ ' _1KHZ, μ ' _3KHZvelocity of variation is respectively 3.7% and 4.3%.

Embodiment 2:

Composition (wt%) is C 0.002%, Si 0.15%, Mn 0.29%, Ni 44.01%, Mo0.2%, the alloy of Fe more than Cu0.1%.Smelt in vacuum induction furnace, through 1200 DEG C of heating, forge hot becomes 40 × 200mm forging stock, after figuring of surface, is rolled into 5 × 210mm torrid zone through 1150 DEG C, then through being cold worked into 0.13mm band.Material heat treatment system: 1120 DEG C × 8h, is cooled to 580 DEG C to be as cold as room temperature soon with the cooling rate of 100 DEG C/h and comes out of the stove, and H2 protects.Obtain performance as shown in table 4:

Table 4

After acceleration 3g vibrates, μ ' _1KHZ, μ ' _3KHZvelocity of variation is respectively 2.7% and 3.5%.

Embodiment 3:

Composition (wt%) is the alloy of Fe more than C 0.01%, Si 0.20%, Mn 0.12%, Ni 44.92%, V0.2%.Smelt in vacuum induction furnace, through 1200 DEG C of heating, forge hot becomes 90 × 90mm base, after figuring of surface, is directly forged into Ф 55mm bar, through 1200 DEG C × 4h, is cooled to 600 DEG C to be as cold as room temperature soon comes out of the stove with the cooling rate of 100 DEG C/h, and H2 protects.Obtain performance as follows:

Claims

1. one kind high saturated magnetic strength, low-loss, proof stress, good rigidity non-retentive alloy, it is characterized in that, the chemical composition quality % of this non-retentive alloy is nickel 43.0 ~ 45.0%, carbon 0.001 ~ 0.02%, silicon 0.001 ~ 0.20%, manganese 0.001 ~ 0.40%, sulphur is less than 0.015%, also comprise in 0.01 ~ 0.5% molybdenum, copper, chromium, vanadium one or more, all the other are iron and inevitable impurity.

2. non-retentive alloy according to claim 1, is characterized in that, Mo, Cu, Cr, V that this alloy comprises are no more than 0.5wt% at most.

3. non-retentive alloy according to claim 1, is characterized in that, make the in-fighting Q of alloy bar material ^-1be less than or equal to 2 × 10 ^-3.

4. non-retentive alloy according to claim 1, is characterized in that, the technical parameter of processing step prepared by this non-retentive alloy and control is as follows:

(1) smelt: Ni plate, Si block, Mn block, C grain are put into vacuum induction furnace with one or more and the Fe block in micro-Mo, Cu, Cr, V and smelted into steel ingot;

(2) forging and hot rolling finished product forge rod or forging stock, or forging stock is rolled into the torrid zone through hot rolls;

(3) cold rolling: not 0.1 ~ 0.3mm thickness is processed into through cold-rolling mill in the torrid zone;

(4) thermal treatment: Heating temperature is 1120 DEG C ~ 1200 DEG C, and soaking time is 4 ~ 8 hours, with the cooling of 100 ~ 250 DEG C/h speed, is cooled to 500 DEG C ~ 600 DEG C, then continues to be cooled to 20 ~ 200 DEG C with the cold true speed being not less than 400 DEG C/h and come out of the stove.