Classifications

• • C—CHEMISTRY; METALLURGY
  • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
  • C22C—ALLOYS
  • C22C38/00—Ferrous alloys, e.g. steel alloys
  • C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel

Definitions

• the invention relates to the use of an iron-nickel alloy for highly permeable soft magnetic components with a coercive field strength Hc of max. 12 A / m at one Saturation flux density greater than 1.35 T and one mechanical hardness HV10> 125, especially for yokes and Armature of electromagnetic relays with a hardness HV10> 140.
• the standard DIN 17745 "Wrought alloys made of nickel and iron" names the alloy Ni 48 (material numbers 1.3926 and 1.3927) with approx. 50 mass% Ni.
• the varieties RNi 12 and RNi 8 have a saturation flux density Bs of about 1.5 T.
• Table 1 on one side of the variety RNi 24, that alloys with about 36% by mass Nickel, and on the other hand the types RNi 5 and RNi 2, which correspond to alloys with about 80% by mass of nickel and with contents of the elements copper, chromium and molybdenum.
• the alloys with average nickel contents around 50% by mass differ from the alloys with low nickel contents around 36% by mass as well of the alloys with high nickel contents around 80% by mass, in particular due to a higher magnetic Induction at a field strength of 4000 A / m, which is the Saturation induction corresponds.
• Alloys with medium Nickel contents between about 45 and 50 mass% show that highest achievable in the two-substance system iron-nickel Saturation induction.
• the object of the invention is now an iron-nickel alloy for soft magnetic components, which contributes to the required low coercive force sufficient saturation induction and the highest possible Permeability, preferably for use as a core and Yoke material for electromagnetic relays owns and furthermore mechanical hardness values of HV10> 125 reached.
• a significant increase in strength can be achieved by Precipitation hardening can be achieved.
• nickel or Iron-based alloys this is due to the elements Ti, Al and Nb possible. These elements are in in these systems limited solubility, so that from a supersaturated Mixed crystal fine by suitable annealing treatment distributed excretions are generated in the matrix can.
• the due to this temperature dependent Excretions produced by solubility complicate the Movement of transfers.
• the strongest disability of the Movement of dislocations in a matrix with fine Distributed excretions exist if these a diameter of approx. Have 20 - 50 nm. The corresponds in alloys with approx.
• alloys with approximately 50% Ni a significant increase in mechanical To achieve hardness values without being too strong Loss of permeability is coming.
• the iron-nickel alloy to be used according to the invention achieves the standard values of the magnetic properties of the well-known relay material types RNi 12 and RNi 8.
• the magnetic properties are sufficient to this alloy as core and yoke material for apply electromagnetic relays. So the Iron-nickel alloy e.g. after a four hour Heat treatment at 1080 ° C with furnace cooling down to 450 ° C and subsequent cooling in air a maximum permeability of about 35,000. The coercive force Hc at around 11 A / m it is even lower than that in the standard DIN 17405 required for the RNi 12 grade maximum limit of 12 A / m. These values are average static magnetization measurements have been determined on rings made of 1.0 mm and 1.5 mm thick were carried out.
• An Fe-Ni alloy E to be used according to the invention the composition according to Table 2 was in a 30 t Arc furnace melted and after a block and Hot strip rolling to strips of test thicknesses 1.0 mm and 1.5 mm cold rolled.
• alloy E The magnetic properties of alloy E are listed in Table 3 in comparison to the values of the known materials RNi 8, RNi 12 and RNi 24.
• the higher mechanical hardness in the annealed condition increases the wear resistance of the surfaces of the components made from this material E.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Soft Magnetic Materials (AREA)

Applications Claiming Priority (2)

Publications (1)

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Citations (6)

• 1996
  • 1996-07-12 DE DE1996128138 patent/DE19628138C1/de not_active Revoked
• 1997
  • 1997-06-12 EP EP97109559A patent/EP0818551A1/fr not_active Withdrawn

Patent Citations (6)

Non-Patent Citations (2)

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