GB/T 19345.2-2017 English PDF (GBT19345.2-2017)

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GB/T 19345.2-2017: Amorphous and nanocrystalline alloy -- Part 2: Fe-based nanocrystalline soft magnetic alloy strips
GB/T 19345.2-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.40,77.140.99
H 58
Partially replacing GB/T 19345-2003
Amorphous and nanocrystalline alloy –
Part 2. Fe-based nanocrystalline soft magnetic alloy strip
ISSUED ON. OCTOBER 14, 2017
IMPLEMENTED ON. JULY 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Classification and designation display method ... 6 
The designation of the strip uses a combination of five fields and a connector.
The definition of each field is as follows... 6 
5 General requirements ... 7 
6 Technical requirements ... 8 
7 Inspection and testing ... 12 
8 Packaging, storage, marks and quality certificate ... 15 
9 Order content ... 16 
Annex A (informative) Part of the basic physical parameters of Fe-based
nanocrystalline soft magnetic alloy strip ... 17 
Foreword
GB/T 19345 Amorphous and nanocrystalline alloys consists of several parts.
- Part 1. Fe-based amorphous soft magnetic alloy strips;
- Part 2. Fe-based nanocrystalline soft magnetic alloy strip.
This Part is Part 2 of GB/T 19345.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces the part of Fe-based nanocrystalline soft magnetic alloy strip
in GB/T 19345-2003.
Compared with GB/T 19345-2003, the main changes in this Part are as follows.
- modified the name to “Amorphous and nanocrystalline alloy - Part 2. Fe-
based nanocrystalline soft magnetic alloy strip”;
- added terms (see Clause 3 of this Edition);
- added the classification, product designation naming rules of the strip
(see Clause 4 of this Edition);
- modified the magnetic performance indicators of strips (see 6.1 of this
Edition, 4.3 of Edition 2003);
- refined the strip specifications, and respectively specified the allowable
size deviation (see 6.2 of this Edition, Clause 3 of Edition 2003);
- modified the relevant provisions on sampling, sample preparation and
testing (see 7.1, 7.2, 7.3, 7.4 of this Edition, 6.2, 6.3 and Clause 5 of
Edition 2003);
- added the requirements and inspection method for strip lamination factor
(see 6.3.2, 7.3.3.1 of this Edition);
- modified the inspection method and requirements for toughness of strips
(modified 6.3.3, 7.3.3.2 of this Edition, 4.4, 6.3.3 of Edition 2003);
- refined the requirements for packaging, storage, quality certificate (see
Clause 8 of this Edition, Clause 7 of Edition 2003).
This Part was proposed by China Iron and Steel Association.
Amorphous and nanocrystalline alloy –
Part 2. Fe-based nanocrystalline soft magnetic alloy strip
1 Scope
This Part of GB/T 19345 specifies the classification and designation display
method, general requirements, technical requirements, inspection and testing,
packaging, marks and quality certificate of Fe-based nanocrystalline soft
magnetic alloy strip manufactured with fast quenching process.
This Part is applicable to the iron cores used for medium and high frequency
transformers, common mode inductors, magnetic amplifiers, peak suppressors,
current transformers, filter inductors and sensors, as well as Fe-based
nanocrystalline soft magnetic alloy strip of sheet used for magnetic shielding
and permeability (hereinafter referred to as the strip).
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 2900.1, Electrotechnical terminology Fundamental terms
GB/T 9637, Electrotechnical terminology - Magnetic materials and
components
GB/T 13012, Methods of measurement of d.c. magnetic properties of
magnetically soft materials
GB/T 15019, Designation and classification of rapidly quenched metals
GB/T 19345.1-2007, Amorphous and nanocrystalline alloys - Part 1. Fe-
based amorphous soft magnetic alloy strips
GB/T 19346.1, Amorphous and nanocrystalline alloys measurement
methods - Part 1. AC magnetic properties by the use of ring specimens
GB/T 19346.2, Methods of measurement for amorphous and nanocrystalline
alloys - Part 2. Lamination factor of amorphous alloy strips
5.2.5 The strips shall be wound tightly, no local relaxation, no wrinkles, no
collapse, no falling off during handling due to self-weight, no lateral offset during
unwinding.
5.2.6 The strips may be spliced by removing defects. The front and back parts
of splicing shall be of same designation, same nominal width. The part of
splicing shall be marked. The connection shall be neat and not affect the normal
operation of subsequent processing. If the part of splicing uses other materials
to connect, the material quality of the connecting material shall not damage the
properties of the strips before and after heat treatment. If the strips are in
contact with the liquid during the final use, the connecting material shall not
chemically react with the liquid in contact.
5.2.7 The particular requirements for strip delivery form shall be determined
by the supplier and the purchaser.
5.3 Delivery conditions
The strips are normally delivered in non-sheared semi-processed state
(prepared state) with the absence of a top coat. The particular requirements for
strip delivery form shall be determined by the supplier and the purchaser.
5.4 Surface quality
5.4.1 The surface of the strips shall not have rusts, greases, fingerprints,
foreign materials or the continuous visible oxidation.
5.4.2 The surface of the strips is allowed to have pinholes not larger than 1.0
mm in diameter but not more than 1 per square centimeter.
5.4.3 The strips shall be smooth; there shall be no slivers, burrs, potholes,
wrinkles, folds or other defects affect the use. The edge of the strips shall have
no visible cracks and burrs.
5.5 Shear adaptability
When using suitable equipment for cutting, any part of the strips shall be able
to be cut into the usual shape.
6 Technical requirements
6.1 Physical properties
6.1.1 The strips delivered in the semi-processed state (prepared state) shall
be heat-treated properly to obtain the desired magnetic properties. But the
magnetic properties of the strips and related to the sampling and sample
preparation methods, sample shape and size, sample heat treatment system
increasing the sampling and testing frequency.
7.2 Sampling
7.2.1 It shall extract a sample respectively on the head, the end of each batch
of the strips. When more than one coil is continuously produced in a casting
furnace, a sample shall be taken at the end of each coil. The particular
requirements shall be determined by the supplier and the purchaser.
7.2.2 The sample shall not have folds, pits, cracks and other defects due to
mechanical damage. The surface of the sample shall be clean.
7.2.3 When sampling in the coil, in order to prevent surface contamination or
mechanical damage and other factors interfering with the measurement results,
sampling shall start from the second layer of the head and the tail of the coil.
7.2.4 By reasonably arranging the measurement sequence, the same sample
can be used to measure a variety of characteristics.
7.3 Sample preparation