DE2823599C2 - Use of a nickel-based alloy for the manufacture of magnetostrictive transducers - Google Patents

Description

60 to 96% nickel, 1 to 27% manganese, not more than 38% of at least one of the elements
0 to 20% iron, 0 to 9% vanadium, 0 to 5% silicon, 0 to 7% titanium, 0 to 8% molybdenum, 0 to 6% aluminum, 0 to 6% chromium, 0 to 9% tungsten, 0 up to 11% antimony, 0 to 10% tin, 0 to 22% cobalt and 0 to 10% copper.

From US-PS 20 48 166 is a hardenable alloy with 50 to 80% nickel, 1 to 10% titanium, the remainder copper, known, whereby manganese up to 5% and vanadium up to 1% can also be included as optional components.

While the specified alloy according to DE-OS 14 58 557 soft magnetic and the alloy according to the US-PS 20 48 166 is curable, the object of the present invention is to provide one for the production magnetostrictive transducer usable alloy. tion indicated by high magnetostriction particularly suitable for this use.

This is achieved by the use characterized in the claim.

The alloys to be used are characterized by a magnetostriction of up -50x 10 ^-6 after annealing at a temperature of 700 to 1200 ° C and a 0.2-proof stress 6.5 to 20 kgf / mm ² in.

When choosing the alloy components and determining the most favorable content, one should consider be guided by the fact that the magnetostriction according to the alloy structure and the size of the Magnetostriction constants (they are maximum for pure nickel). When alloying nickel change the two influencing factors. The choice of alloying elements and their content in the alloy are through the following considerations:

The additions may contain the constants λιοο λ
Do not influence possibility too much.

2. It is necessary to have a very strong hardening of the alloy.

3. When annealing in air, a form solid oxide skin, which is characterized by high electrical resistance and good adhesion to the Metal distinguishes itself.

Based on these considerations, copper and manganese were used as basic alloying elements, which the constants λιοο λπι (according to absolute value) miniiaal decrease, as well as titanium, vanadium, molybdenum, Chromium, tungsten, niobium and tantalum as high-melting elements for the desired strengthening of the alloy chosen

The minimum content of the additives was based on the properties of the aforementioned oxide skin and determined by the annealing strength of the alloy structure, in such a way that the higher the

ίο the annealing stone temperature is, the greater this content will be should. The maximum additional contents were chosen so that there was a sufficiently high magnetostriction and yield strength can be achieved.

It has been found that if the alloy contains more than 6.5% by weight of manganese and 0.01% by weight of copper, if one or more refractory elements (Ti, V, Mo, Cr, W, Nb , Ta) are contained in a proportion of more than 5% by weight, the magnetostriction drops ^{to - (20 to 25) χ 10 ~ 6.}

At the same time the required stable alloy structure after annealing at 1100 to 1150 ⁰ C is maintained at said maximum values. In addition, it has been experimentally proven that with an increase in the copper content of the alloy up to 6% by weight, the heat resistance of the alloy structure increases; However, if the copper content is above this value, the heat resistance of the structure practically no longer changes.

If an alloy is used in the less

jo contain as 0.05 wt.% Mn, less than 0.01 wt.% Cu and less than 0.01 wt ⁰ C inconsistent, which results in a sharp decrease in magnetostriction. In addition, when the specified minimum amount of additives in the alloy is reduced, the mechanical properties of the latter are no longer superior to those of pure nickel, ie the alloy has a low yield strength.

The alloy to be used according to the invention, in which 0.05 to 6.5% by weight Mn, 0.01 to 6% by weight Cu and 0.01 to 5% by weight Ti and / or V and / or Mo and / or Cr and / or W and / or Nb and / or Ta, the balance is contained (to 100 wt .-%) Ni, has a magneto · riktion of -5Ox 10 ^-6 after annealing at a temperature of 700 to 1200 ^° C. and a 0.2 yield point of 6.5 to 15 or 20 kp / mm ² . By heating a herges'eilten therefrom strip to a temperature from 700 to 1200 ⁰ C at its surface becomes coated with a solid oxide skin, which permit to make it !, magnetostrictive transducers as layered band packages. It should also be noted that in the production of powerful, heavily loaded transducers, an alloy with a maximum content of alloying elements (predominantly high-melting elements) is to be used, although the magnetostriction is reduced. For lightly loaded vibrators, on the other hand, economical alloying is indicated, because this enables high magnetostriction values and a yield strength of 6.5 to 8 kp / mm ^{2 to be} achieved.

example 1

b5 An alloy with a content of 95.5% by weight Ni, 2, C wt .-% Cu, 2.0 wt .-% Mn, 0.5 wt .-% Ti is in the induction furnace with a protective gas (argon) in melted in a magnesite crucible. Cathode nickel

and copper are added to the crucible as suction, the mixture is melted and then then the melt is deoxidized in the usual way Weighed amounts of Mn and Ti are added, after which the alloy is poured into a cast iron mold.

The bar with a thickness of 110 mm is ^{rolled down to a thickness of 12 mm on a hot rolling mill at ItOO 0} C, milled and rolled on cold rolling mills to a thickness of 0.2 mm with intervening annealing at 750 ° C

Samples 200 10 χ 0.2 mm for determining the magnetostriction are made from the tape produced and the yield point cut.

To measure the magnetostriction, strain gauges connected in series with a resistance of 200 ohms each in a bridge circuit are glued to a sample on both sides. The sample is placed in a solenoid in which there is a magnetic field with a strength of 20 to 500 Oe. The magnetostriction of the sample causes a detuning in the bridge circuit, which is registered by a photoelectric amplifier and a galvanometer. The deterioration size AR is measured by further bridge adjustment with the aid of the resistance magazine.

In the saturation field the bridge detuning AR was 375x10- "ohms. The magnetostriction is calculated according to the following formula:

The yield strength of the tested sample was 9.5 kp / mm ² .

Example 2

An alloy with a content of 93.48% by weight Ni, 0.01% by weight Cu, 6.5% by weight Mn and 0.01% by weight Nb is melted in an induction furnace in a magnesite crucible under a layer of flux. Cathode nickel and copper are added to the crucible as charge, the mixture is melted, and then weights of Mn and Nb are added to the melt. The alloy is then cast in a cast iron mold.

The 110 mm thick billet is rolled to a thickness of 12 mm on a hot rolling mill at a temperature of HOO ⁰ C, milled and then rolled on cold rolling mills to a thickness of 0.2 mm with intermediate anneals at 750 ° C.

From the tape produced, samples 20 × 10 × 0.2 mm are used to measure the magnetostriction and the yield point cut.

The measurement of the Α size is carried out according to the method described in Example 1.

The magnetostriction of the tested sample was - 25 χ 10- ⁶ and the yield strength of 17 kgf / mm ^2.

Example 3

An alloy with einetr. Content of 94.8% by weight Ni, 0.1% by weight Cu, 0.1% by weight Mn and 5.0% by weight Cr is placed in a magnesite crucible in the induction furnace Vacuum melted. Cathode nickel and copper are added to the crucible as charge and melted, after which manganese and chromium weights are added. The alloy is then cast in a cast iron mold.

The 110 mm thick billet is made on a hot rolling mill Milled at a temperature of 1100 ° C to a thickness of 12 mm and milled on cold rolling mills rolled down to 0.2 mm with intermediate anneals at a temperature of 750 ° C

The produced tape becomes samples 200 × 10 × 0.2 mm for measuring the magnetostriction and the yield point cut.

The measurement of the λ size is carried out according to the method described in Example 1.

The magnetostriction of the tested sample was -23 × 10 " ^e and the yield strength was 26 kp / mm ²

Example 4

An alloy in which 93.45 wt% Ni, 6.0 wt% Cu, 0.05 wt% Mn and 0.5 wt% W are melted in an induction furnace in a magnesite crucible in an argon atmosphere. Cathode nickel and copper are placed in the crucible as charge and melted, after which the Melt is deoxidized in the usual way. Then you enter the manganese and tungsten weights. the Alloy is then poured into a cast iron mold.

The 110 mm thick ingot is rolled down mm on a hot-rolling mill at a temperature of 1100 ⁰ C to a thickness of 12, milled and cold rolling mills to a thickness of 0.2 mm with intermediate annealing at 750 ⁰ C rolled down.

Samples with dimensions of 200 10 χ 0.2 mm for measuring the magnetostriction are made from the tape and the yield point cut out.

The measurement of the λ size is carried out according to the method described in the example.

The magnetostriction of the tested sample was -48 × 10 ⁶ and the yield strength 10 kp / mm ² .

Example 5

An alloy with a content of 99.84% by weight Ni, 0.01% by weight Cu, 0.05% by weight Mn and 0.1% by weight V is melted in an induction furnace in a magnesite crucible under vacuum. Cathode nickel and copper are added to the crucible as feed and melted, after which the melt in the usual way is deoxidized. Then the manganese and vanadium weights are entered. You shed them Alloy then into a cast iron mold.

The 110 mm thick ingot is rolled mm on a hot-rolling mill at a temperature of 1100 ⁰ C to a thickness of 12, milled and cold rolling mills to a thickness of 0.2 mm rolled down with intermediate annealings at 750 ⁰ C.

The produced tape becomes samples 200 × 10 × 0.2 mm for measuring the magnetostriction and the yield point cut out.

The measurement of the Α size is carried out according to the method described in Example 1.

The magnetostriction of the tested sample is - 52 χ 10- ⁶ and the yield strength 5.5 kp / mm ² .

Example 6

An alloy with a content of 96.5% by weight Ni, 2.0% by weight Cu, 1.0% by weight Mn and 0.5% by weight Mo is melted in an induction furnace in a magnesite crucible under a layer of flux. Kathodennikkei and copper are added to the crucible as charge and melted, after which the melt in is usually deoxidized. You enter the manganese and molybdenum weights and cast the alloy in a cast iron mold.

The 110 mm thick ingot is on a rolling mill mm When rolled, milled and cold rolling mills to a thickness of 0.2 mm further rolled with intermediate annealings at 750 ° C at a temperature of 1100 ⁰ C to a thickness of 12th

Samples 200 χ 10 × 0.2 mm are made from the produced tape to determine the magnetostriction and the yield point cut out.

The value of λ is measured according to the method described in Example 1. ι ο

The magnetostriction of the tested sample amounts to -48 χ 10 ~ ⁶ and the yield strength of 6.5 kgf / mm ^2.

Example 7
(Comparative example)

15th

An alloy with a content of 99.98% by weight Ni, 0.005% by weight Cu, 0.01% by weight Mn, 0.005% by weight W is melted in an induction furnace with an argon atmosphere in a magnesite crucible. Cathode nickel and -copper are added as a batch to the crucible and melted, after which the metal in the usual way is deoxidized. You enter the manganese and tungsten weights and cast the alloy in one Cast iron shape.

The ingot of a thickness of 110 mm is rolled mm on a hot-rolling mill at 1100 ⁰ C to a thickness of 12, milled and cold rolling mills to a thickness of 0.2 mm with intermediate Giühungen at 750 ° C rolled down.

Samples 20 × 10 × 0.2 mm for measuring the magnetostriction are made from the tape produced and the yield strength

The measurement of the A value is carried out according to the method explained in Example 1.

The magnetostriction of the tested sample amounts to -38x 10 ~ ⁶ and the yield strength at 4.0 kgf / mm ^2.

Example 8
(Comparative example)

An alloy in which 92.94 wt% Ni, 0.05 wt% Cu, 7.00 wt% Mn and 0.01 wt% Cr are melted in an induction furnace with an argon atmosphere in the magnesite crucible. Cathode nickel and copper are added to the crucible as feed and melted, after which the Metal is deoxidized in the usual way. You enter manganese and chromium weights and cast them Alloy in a cast iron mold.

The 110 vnm thick ingot is rolled mm on a hot-rolling mill at 1100 ⁰ C to a thickness of 12, milled and cold-rolling machines to 0.2 mm rolled down under intermediate annealing at 750 ° C.

Samples 200 10 χ 0.2 mm for measuring the magnetostriction are made from the produced tape and the yield strength.

The measurement of the Α size is carried out according to the method described in Example 1.

The magnetostriction of the tested sample amounts to - 2Ox 10 ~ ⁶ and the yield strength to 16 kp / mm ² .

Example 7

60

An alloy with a content of 97.94 wt .-% NiI ₁ O wt .-% of Cu, 1.0 wt .-% Mn, 0.01 wt ° / o Ti and 0.05 wt .-% Mo is melted in an induction furnace with a protective argon atmosphere in a magnetic crucible. Cathode nickel and copper are added to the crucible as a batch and melted, after which the metal is deoxidized in the usual way. You then enter the manganese, molybdenum and titanium weights and pour the material into a cast iron mold.

The 110 mm thick ingot is rolled mm on a hot-rolling mill at 1100 ⁰ C to a thickness of 12, milled and cold rolling mills to a thickness of 0.2 mm rolled down under Zwischenglühungeo at 750 ⁰ C.

Samples 200 10 χ 0.2 mm for measuring the magnetostriction are made from the produced tape and the yield point cut out.

The measurement of the magnetostriction takes place according to the method set out in Example 1.

The magnetostriction of the tested sample is -46 χ 10 ~ ⁶ and its yield strength 7.0 kgf / mm ^2.

Example 8

An alloy with a content of 97.1% by weight Ni, 2.0% by weight Cu, 0.5% by weight Mn, 0.1% by weight Mo, 0.3 Weight% Cr is melted in an induction furnace in a magnesite crucible under a layer of flux. Cathode nickel and copper are added to the crucible as charge and melted, then Manganese, molybdenum and chromium weights are added to the melt, followed by casting follows the alloy into a cast iron shape.

The 110 mm thick ingot is to a hot rolling mill mm rolled, milled and cold rolling mills to a thickness of 0.2 mm rolled down with intermediate annealings at 750 ⁰ C at a temperature of 1100 ° C to a thickness of 12th

From the tape produced, samples 20 × 10 × 0.2 mm are used to measure the magnetostriction and the yield strength.

The measurement of λ is carried out according to the method described in Example 1.

The magnetostriction of the tested sample is -47 χ 10 ~ ⁶ and its yield strength 7 kp / mm ^2.

Example 9

An alloy containing 96.85 wt% Ni, 0.1 wt% Ni Cu, 2.0 wt% Mn, 1.0 wt% Cr and 0.05 wt% Nb contains, is melted in an induction furnace in a magnesite crucible under vacuum. Cathode nickel and -copper are added to the crucible as a charge and melted, after which the metal is deoxidized. You enter manganese, chromium and niobium weights and then pour the material into a cast iron mold.

The 110 mm thick ingot is rolled down mm on a hot-rolling mill at a temperature of 1100 ⁰ C to a thickness of 12, milled and cold-rolling machine to a thickness of 0.2 mm with intermediate annealing at 750 ° C rolled down.

Samples 100 χ 10 χ 0.2 mm for measuring the magnetostriction are made from the tape produced and the yield point cut out.

The Α value is measured according to the method described in Example 1.

The magnetostriction of the tested sample amounts to -44 × 10 " ⁶ and its yield strength to 10.0 kp / mm ² .

Claims (1)

Claim use of an alloy of 0.05% to 6.5% manganese; 0.01 to 6% copper; 0.01 to 5.0% at least one of the elements: titanium, vanadium, molybdenum, chromium, tungsten, niobium, tantalum; rest Nickel for the manufacture of magnetostrictive transducers. The invention relates to the use of an alloy from 0.05 to 6.5% manganese, 0.01 to 6% copper, 0.01 to 5% at least one of the elements titanium, vanadium, Molybdenum, chromium, tungsten, niobium, tantalum and nickel as the remainder, for the manufacture of magnetostrictive transducers. From DE-OS 14 58 557 a soft magnetic alloy with the following composition is known: