GB825692A - Improvements in or relating to a method of treating silicon-iron alloys - Google Patents

Improvements in or relating to a method of treating silicon-iron alloys

Info

Publication number
GB825692A
GB825692A GB8127/58A GB812758A GB825692A GB 825692 A GB825692 A GB 825692A GB 8127/58 A GB8127/58 A GB 8127/58A GB 812758 A GB812758 A GB 812758A GB 825692 A GB825692 A GB 825692A
Authority
GB
United Kingdom
Prior art keywords
heat treatment
iron alloys
carried out
deformation
relating
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
GB8127/58A
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.)
Vacuumschmelze GmbH and Co KG
Original Assignee
Vacuumschmelze GmbH and Co KG
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 Vacuumschmelze GmbH and Co KG filed Critical Vacuumschmelze GmbH and Co KG
Publication of GB825692A publication Critical patent/GB825692A/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
    • C21D8/1216—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
    • C21D8/1244—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

Abstract

In the heat treatment of silicon-iron alloys as described in the parent Specification, (a) the cold deformations are followed by introducing heat treatments, (b) the percentage reduction of the section of the workpiece produced by the last deformation (40-85%) is greater than that produced by the penultimate deformation (8-40%) and (c) the heat treatment between the last two stages is carried out at a temperature between 750 and 950 DEG C. The final heat treatment may be preceded by an additional heat treatment the temperature (500-800 DEG C.) and duration (at least 10 minutes) of which are such that more than 90% complete primary recrystallization takes place with less than 10% secondary recrystallization with cubic texture. This additional heat treatment may be carried out in a non-oxidizing or gently oxidizing atmosphere preferably containing hydrogen, and the workpiece may or may not be cooled to room temperature before the final heat treatment.
GB8127/58A 1957-03-27 1958-03-13 Improvements in or relating to a method of treating silicon-iron alloys Expired GB825692A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE825692X 1957-03-27

Publications (1)

Publication Number Publication Date
GB825692A true GB825692A (en) 1959-12-23

Family

ID=6747601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8127/58A Expired GB825692A (en) 1957-03-27 1958-03-13 Improvements in or relating to a method of treating silicon-iron alloys

Country Status (1)

Country Link
GB (1) GB825692A (en)

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