GB400395A - Improvements relating to processes for improving ferromagnetic alloys - Google Patents

Improvements relating to processes for improving ferromagnetic alloys

Info

Publication number
GB400395A
GB400395A GB24096/32A GB2409632A GB400395A GB 400395 A GB400395 A GB 400395A GB 24096/32 A GB24096/32 A GB 24096/32A GB 2409632 A GB2409632 A GB 2409632A GB 400395 A GB400395 A GB 400395A
Authority
GB
United Kingdom
Prior art keywords
nickel
per cent
stretching
stretched
iron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB24096/32A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB400395A publication Critical patent/GB400395A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1272—Final recrystallisation annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1233—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1238—Flattening; Dressing; Flexing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
    • C21D8/1266—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest between cold rolling steps

Abstract

In a process for improving ferro-magnetic alloys which have been treated by repeated rolling or stretching, preferably with intermediate heating between the initial stretching steps, the alloys are subjected after the final rolling or stretching step to a prolonged heating at 100-250 DEG C. The process may be applied to iron-nickel alloys containing 30-80 per cent of nickel or to an alloy containing 40 per cent of nickel, 60 of iron and 3 of aluminium. In an example, rods of an iron-nickel alloy containing 50 per cent of nickel are homogenized by heating at 800-900 DEG C. for an hour, stretched to obtain a reduction of 10 per cent in cross section, annealed for an hour at 900 DEG C., stretched in the cold and then annealed, the stretching and intermediate annealing being repeated three times. After the final annealing the material is stretched in the cold to obtain a reduction in cross section of 60-70 per cent and is heated for 24 hours at 130 DEG C. and then allowed to cool slowly. Specifications 363,697, [Group XXXVI], is referred to. Reference has been directed by the Comptroller to Specification 364,696, (as open to inspection under Sect. 91 of the Acts).
GB24096/32A 1931-08-28 1932-08-29 Improvements relating to processes for improving ferromagnetic alloys Expired GB400395A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE400395X 1931-08-28

Publications (1)

Publication Number Publication Date
GB400395A true GB400395A (en) 1933-10-26

Family

ID=6399793

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24096/32A Expired GB400395A (en) 1931-08-28 1932-08-29 Improvements relating to processes for improving ferromagnetic alloys

Country Status (1)

Country Link
GB (1) GB400395A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230118A (en) * 1961-08-15 1966-01-18 Screw & Bolt Corp Of America Method of developing high physical properties in ferrous material and product produced thereby
US11462358B2 (en) * 2017-08-18 2022-10-04 Northeastern University Method of tetratenite production and system therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230118A (en) * 1961-08-15 1966-01-18 Screw & Bolt Corp Of America Method of developing high physical properties in ferrous material and product produced thereby
US11462358B2 (en) * 2017-08-18 2022-10-04 Northeastern University Method of tetratenite production and system therefor

Similar Documents

Publication Publication Date Title
GB425439A (en) Improvements in or relating to screw-threaded metal parts
DE1966231C3 (en) Process for the production of transformer sheets
DE1181256B (en) Process for the manufacture of oriented silicon steel
GB400395A (en) Improvements relating to processes for improving ferromagnetic alloys
US1660790A (en) Process of preparing alloy steel for die blocks and other purposes
DE1264476B (en) Process to reduce the power loss and to increase the permeability of silicon steel sheet
US3008857A (en) Process for the production of grain oriented magnetizable strips and sheets
US2076383A (en) Process for improving the magnetic properties of silicon steel
US2082041A (en) Process for producing permanent magnets
US2102683A (en) Method of heat treating nickel-iron alloys
GB848512A (en) Improvements in or relating to a process for producing silicon steel
US1677139A (en) Process for increasing the permeability of silicon steel
GB474544A (en) Improvements in and relating to methods of increasing the permeability of silicon iron
US2533394A (en) Method of obtaining large grain size in silicon steel
DE602751C (en) Process for reducing the electrical resistance of aluminum
GB352964A (en) Process for improving iron-titanium alloys
GB870220A (en) Non oriented silicon-iron sheet stock and process of making it
GB285814A (en) Process for the manufacture of steel
DE556045C (en) Quenching and tempering of cobalt-molybdenum alloys
DE977648C (en) Process for improving the properties of magnetically stressed objects made of iron-silicon alloys
GB431511A (en) Improvements in and relating to magnetic alloys
GB496730A (en) Improvements in or relating to the production of alloys for permanent magnets
DE908624C (en) Process for improving the magnetic and mechanical properties of transformer and dynamo sheets made of silicon steel
GB392711A (en) Process for improving the mechanical and magnetic properties of iron-nickel-beryllium alloys
US1685877A (en) Heat treatment of permanent magnets