GB/T 14986.3-2018 Soft magnetic alloys - Part 3: Iron-cobalt alloys
1 Scope
This part of GB/T 14986 specifies the terms and definitions, classification, order contents, dimensions, shape, technical requirements, test methods, inspection rules, packaging, marking and quality certification of 1J21, 1J22 and 1J27 soft magnetic iron-cobalt alloy products with high saturation magnetic induction intensity and high magnetostriction coefficients.
This part is applicable to cold-rolled strips, cold-drawn wires, hot-rolled flat billets and hot-rolled (forged) bars made of 1J21, 1J22 and 1J27 iron-cobalt alloys (hereinafter referred to as "alloy products").
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.11 Iron steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method
GB/T 223.13 Methods for chemical analysis of iron, steel and alloy - The ammonium ferrous sulfate titration method for the determination of vanadium content
GB/T 223.18 Methods for chemical analysis of iron, steel and alloy - The sodium thiosulfate separation iodimetric method for the determination of cupper content
GB/T 223.20 Methods for chemical analysis of iron, steel and alloy - The potentiometric titration method for the determination of cobalt content
GB/T 223.23 Iron, steel and alloy - Determination of nickel content - The dimethylglyoxime spectrophotometric method
GB/T 223.59 Iron, steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
GB/T 223.64 Iron steel and alloyed - Determination of manganese content - Flame atomic absorption spectrometric method
GB/T 223.79 Iron and steel - Determination of multi-element contents - X-ray fluorescence spectrometry (Routine method)
GB/T 223.85 Steel and iron - Determination of sulfur content - Infrared absorption method after combustion in an induction furnace
GB/T 223.86 Steel, iron and alloy - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace
GB/T 4162 Forged and rolled steel bars - Method for ultrasonic testing
GB/T 14986.1-2018 Soft magnetic alloys - Part 1: General requirements
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
GB/T 20123 Steel and iron - Determination of total carbon and sulfur content - Infrared absorption method after combustion in an induction furnace (routine method)
GB/T 20125 Low-alloy steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 14986.1-2018 apply.
4 Classification
Iron-cobalt alloys are sub-classified into the following three categories according to cobalt content:
a) F1: With cobalt content of 49.0%~51.0% and vanadium content of 0.8%~2.0%;
b) F2: With cobalt content of 34.5%~36.0%;
c) F3: With cobalt content of 26.5%~28.5%.
Note: They are also referred to as "iron-cobalt-vanadium alloys" in some publications.
5 Order contents
Order contracts made based on this part shall cover the following items:
a) No. of this part;
b) Alloy designations;
c) Dimensions and precision groups (see Clause 6);
d) Weight (or quantity);
Foreword I
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Order contents
6 Dimensions and shapes
7 Technical requirements
8 Test methods
9 Inspection rules
10 Packaging, marking and quality certification
Annex A (Informative) Recommended heat treatment regimes for samples
Annex B (Informative) Basic physical parameters of alloys and typical properties of alloy products
