SU735654A1 - Magnetically soft alloy - Google Patents

Description

(54) MAGNETIC-SOFT ALLOY

I The invention relates to metallurgy, in particular to iron-silicon alloys having a texture (10O) in a sheet, and is intended for the cores of the magnetic circuits of the electrical and electronics industries. Known magnetic material of the following chemical composition, wt.%: Silicon-7. Phosphorus. Oh, 1-5 Iron Others This alloy does not have a cubic texture, since phosphorus is involved in texture formation only in the presence of nickel. The magnitude of the magnetic induction for this alloy does not exceed 1.56 T. The closest to the invention according to its technical essence and the achieved result is a soft magnetic alloy following its chemical composition, wt.%: Silicon 2.7-4.0 Ma apa 0.1 -0.3, Nickel-0.5-1.5 IronOther 2 The alloy may contain carbon in an amount of not more than 0.02 wt.%. The known alloy has a high level of magnetic properties due to the nickel introduced into it, leading to the formation of a cubic texture. But obtaining a high level of magnetic properties is achieved after annealing in a hydrogen atmosphere with a high dew point (-6.0 C) or high vacuum (mm Hg), which is not ensured under industrial conditions. The purpose of the invention is to increase the magnetic properties in the plane of the sheet and their isotropy, to create structural homogeneity, to increase eye resistance, corrosion resistance and plasticity. This goal is achieved by the fact that the soft magnetic alloy containing silicon, nickel and iron additionally contains phosphorus in the following ratio of Components, wt.%:

Silicon 2,5-6,0

Nyksh0,2-1,0

Phosphorus, O2-O, 3

IronErest

The introduction of 0.02-0.3% of phosphorus with the presence of 5 other elements of the alloy makes it possible to control the grain size in the Finished strip, respectively, in the range of 200.3 mm with its preferential orientation (100) 001 or (I00), 10 to increase the magnetic properties due to the creation of a more homogeneous fine-grained structure of the alloy, to increase the plasticity during rolling, corrosion resistance, to reduce the formation of holes in the mountains - 15 times rolling and reduce the requirements for the final annealing,

The nickel content up to 1.0% nickel favorably influences the process of the formation of a cubic texture in cold-rolled {{ferrous} 20

steel, expanding the region of the y - phase in the Fe-S system (and lowering the surface energy of the {1OO) plane. The beneficial effect of nickel on the formation of a cubic texture manifests itself at a concentration close to the conversion region, i.e. its effect is similar to the effect of reducing the silicon concentration. The content of impurities that influence the texture of the row (carbon, sulfur,, oxygen, aluminum, titanium, manganese) is limited.

The limitation of the content of impurities is achieved, firstly, by using a sufficiently pure charge, and secondly, by smelting in a vacuum-hinduction furnace and heating in the process of intermediate annealing in a controlled reducing atmosphere or vacuum. Such measures limit the content of the above impurities within the following limits, wt.%: Carbon0.001-0.025

Sulfur0, OOO5-0, O1

Nitro 0.0003-0.01

Oxygen0,6003-О, 01 5

Aluminum0,0005-0,015

Manganese, OOO5-0,5

TitanO, 0005-0, b1

Under the conditions of the experimental plant of the TsNIICHM, an alloy of 50 Kylo- 50 gram vacuum-inductive fines was made,

The mixture contains iron composition, wt.%: Silicon 0.03;, aluminum 0.05} phosphorus 0.003gluerode 0.008} sulfur 0.005}, oxygen 0.03} manganese 0.006; 55 nickel 0, OZ and silicon crystalline composition, wt.%: Silicon 99.0; iron j 0.5 {aluminum 0.5.

At melting point, crucibles of MgO and CaO are used.

The resulting ingots are forged on billows, which are further Subjected to hot rolling followed by normalization. annealing at a hydrogen atmosphere with a dew point not higher than -2СРС.

Next, the alloy is subjected to cold rolling with a different number of intermediate annealing and final annealing, which are conducted in a hydrogen medium with a point of casting from -2O to -30 ° C or vacuum with a residual pressure not higher than 1O mm Hg. at 1100-1400 ° C.

To obtain a (100) bcb texture, one-sided cold rolling with a reduction of more than 90% is used. In order to obtain the texture (SO) 001, at least 3-fold rolling with reductions of 40-80% and intermediate annealing at 950-1100 in hydrogen with a dew point not higher than -20 ° C is required.

Table 1 gives examples of the chemical composition of the alloys, wt.%:

Magnetic alloyed alloys are shown in Table 2,

The magnetic properties of the known alloy Bai for a tape with a thickness of 0, O8 mm in the middle: the appearance with an alloy of N 2 having a similar texture (10 Å) O01 for a slit O, 08 mm is much higher.

Alloys 1 and 3 have a (100) Wt planar cubic texture. provide the isotropy of the magnetic properties and the plane of the sheet along all directions mi, which allows them to use them.

In addition, alloying of the alloy with phosphorus allows for increased induction and significantly reduced losses. The positive effect of phosphorus on corrosion resistance and scaling resistance is checked by the degree of oxidation of the metal after hot rolling onto a sheet of 2.5 mm and after heat treatment of cold-rolled metal with a thickness of 80 µm in hydrogen with a dew point of –ZO C. The experimental data are given in Table. 3, /

The proposed alloy allows to obtain in the O, O8-0.5 mm tape a perfect cubic text and a planar cubic texture with good magnetic properties along and across the rolling direction. For alloy 2 with a cubic (lOO) OOl texture, magnetic induction and a field of 25 A / cm for a sheet thickness of 0.08-0.5 mm is in the range of 1.92-1.85 T with a coercive force of 0.07-0.09 E. Specific losses when reversing. since

5 7356546

Tricky 5O and 40O Hz and the value of industrial electrical silicon silicon, 1.5 T are made for ribbons of thick steel along the rolling direction.

0.8 mm Pi.e / Aod W / kg; for 0.15 mm - In addition, the proposed alloy is Pp / oo W / kg; for O, 3 mm - Rd / W / kg: good technological properties of 0.5 mm. Rd / ddI W / kg. It is very s mi: it has a small scale when heated under

high properties, and they are maintained along and across the rolling direction. Whereas according to GOST 9925-61 for grades E360 for thicknesses of 0.08 and 0.15 mm, 82 T with a coercive force of 0.28-0.26, Yuroshuyu reproducibility of high magnetA / cm and lost Ux G 5 / doo W / kg vs properties, increased corrosion and 19 W / kg, respectively. Resistance compared to conventional cream. The best domestic grades of silicon steel, the ability to carry out that steel with a rib texture is found — the final high-temperature ss at the level of the best foreign analogues, industrial conditions - hydrogen sludge tape thickness 0.35 mm and 0.5 mm with a dew point t -20 to -ZO-C or wiendukdi is 1.9 T at an intensity of 1 O mm Hg. losses x P ,, 5o / 1.1 W / kg and the expected economic effect of 1.75 W / kg. embed tape with cubic texture

Thus, magnetic properties20 are only for creating parametric

The proposed alloy along and across .transformers is 38O.t. of the rolling direction better than the properties of the pr (-lea. 12.5 0.02 0.2 23.02 0.2O, 4 36.0 O, 31 Known3, O1 Oh, 01 O, S

  .-; -; -. -burned Rolling, has good plasticity during cold rolling, uniform structure of hot rolled strip and finished sheet, providing a table of 1 O, OO5 O, 004 0, O1 0.007 0.01 O, 0016 0, O06 O, 015 0, OO4 O , 008 0.05 OOOOb 0, OO15 0.005 O, 0130 0.002 0.01 0.03 0.01 0, OOO8 0, OO2. . 0,012 O, OO4 p, O1 ODO, O5 b, OO2 T a b l and c a 2

LimeAlloy is not a texture0, 09 0.006 Route, many

Option 1 0, O17 0, OO08 Texture

Version 0.015 0.0007

735654

8 Continued table. 2

Table

oxygen

(1oo) ike

73565410

Ph op of the invention Silicon 2.5-6

.Nickel 0.2-1

Mapgatyo-mkyyplav containing cream-, Phosphorus 0.02-0.3

mi nickel in iron, about tl and h

W and ft so that, in order to increase j

magnetic properties in the plane of the sheet and sources of information,

T / C isotropy, creating a structured focus in the examination

homogeneity, increase scaling resistance-1. Japan Patent No. 12O45i

TI | corrosion resistance and plastic-cl. 1AA 61, 1965., it contains smelt phosphorus at about 2, USSR Author's Certificate with the total weight of components, wt%: Ni 166722 Cl, C 22 C 38/08, 1964.

Claims (1)

Claim Soft magnetic alloy containing silicon; nickel and iron, the fact is that, in order to increase the magnetic properties in the plane of the sheet and dx isotropy, to create structural uniformity, increase scaling resistance, corrosion resistance and ductility. it additionally contains phosphorus in the following ratio of components, wt.%: YU Silicon 2.5-6 Nickel 0.2-1 Phosphorus 0.02-0.3 ' Iron Else