GB/T 13560-2017 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 13560-2017 | English | 185 |
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Sintered neodymium iron boron permanent magnets
| Valid |
| GB/T 13560-2009 | English | 70 |
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Materials for sintered neodymium iron boron permanent magnets
| Obsolete |
| GB/T 13560-2000 | English | 359 |
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Materials for sintered neodymium iron boron permanent magnets
| Obsolete |
| GB/T 13560-1992 | English | RFQ |
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Materials for sintered Nd-Fe-B permanent magnets
| Obsolete |
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GB/T 13560-2017: Sintered neodymium iron boron permanent magnets---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT13560-2017
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.99
H 65
Replacing GB/T 13560-2009
Sintered neodymium iron boron permanent magnets
Issued on. OCTOBER 14, 2017
Implemented on. MAY 01, 2018
Issued by. General Administration of Quality Supervision Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Material classification and grades... 7
5 Requirements... 8
6 Test methods... 11
7 Inspection rules... 11
8 Marking, packaging, transportation, storage and quality certificate... 12
Appendix A (Normative) Size and shape & position deviation of sintered
neodymium iron boron permanent magnets... 14
Appendix B (Informative) Additional magnetic properties and main mechanical
and physical properties of sintered neodymium iron boron permanent magnets
... 15
Appendix C (Informative) Chemical composition, manufacturing process and
application of sintered neodymium iron boron permanent magnets... 17
Appendix D (Informative) Magnetic properties unit system, conversion table and
grade magnetic properties comparison of sintered neodymium iron boron
permanent magnets... 19
1 Scope
This standard specifies the requirements, test methods, inspection rules and
markings, packaging, transportation, storage and quality certificates of sintered
neodymium iron boron permanent magnets.
This standard applies to sintered neodymium iron boron permanent magnets
produced by powder metallurgy.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1.
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 3217 Permanent magnet (magnetically hard) materials - Methods of
measurement of magnetic properties
GB/T 8170 Rules of rounding off for numerical values & expression and
judgement of limiting values
GB/T 9637 Electrotechnical terminology - Magnetic materials and
components
GB/T 15676 Terms for rare earths
GB/T 24270 Method of measurement of temperature coefficient of magnetic
properties of permanent magnetic materials
GB/T 29628 Guides for methods of measurement of the magnetic properties
of permanent (magnetically hard) materials by pulsed field magnetometry
GB/T 34491 Coatings for sintered neodymium iron boron permanent
magnets
3 Terms and definitions
The terms and definitions as defined in GB/T 9637 and GB/T 15676 as well as
the following terms and definitions apply to this document.
3.1 Principal magnetic properties
It mainly includes residual magnetization of permanent magnets Br,
magnetic polarization coercivity (inner coercivity) HcJ, magnetic induction
coercivity HcB, maximum magnetic energy product (BH)max.
3.2 Additional magnetic properties
It mainly includes the relative recoil permeability μrec of the permanent
magnet, the remanence temperature coefficient α (Br), the magnetic
polarization coercivity (inner coercivity) temperature coefficient α (HcJ), the
Curie temperature Tc.
3.3 Irreversible flux losses
In an open circuit state, the irreversible amount of relative change in the
magnetic flux of the permanent magnet as a function of temperature
increases. The calculation method of irreversible flux loss is as shown in
formula (1).
3.4 Maximum operating temperature
A permanent magnet cylinder sample with a thermal demagnetization state
of L/D = 0.7 (diameter D, height L), after saturation magnetization, is heated
from room temperature to a constant temperature for 2 h in an open circuit
state, then cooled to room temperature, its open circuit irreversible flux loss
≤ 5% of the maximum holding temperature.
4 Material classification and grades
4.1 Material classification
Sintered neodymium iron boron permanent magnet is divided into low coercivity
N, medium coercivity M, high coercivity H, super-high coercivity SH, ultra-high
coercivity UH, extremely high coercivity EH, top high coercivity TH in
accordance with the intrinsic coercivity.
4.2 Material grade
Each type of product is divided into several grades in accordance with the
maximum magnetic energy product. Each grade of material can be processed
into permanent magnet parts of various shapes and specifications such as
discs, cylinders, rings and tiles.
4.3 Character grade representation method
The grade of sintered neodymium iron boron permanent magnets is composed
of material manufacturing characteristics, main name and magnetic
characteristics. The first part S indicates the manufacturing characteristics of
the material, which uses the Chinese phonetic alphabet S to indicate the
sintered material produced by the powder metallurgy sintering process; the
second part is the main name, which is composed of the element symbol Nd of
neodymium, the element symbol Fe of iron and the element symbol B of boron,
that is, NdFeB;
5 Requirements
5.1 The principal magnetic properties and squareness of the material at room
temperature 20 °C shall comply with the requirements of Table 1.Table 1 does
not include the parameters of other grades produced by the dysprosium
diffusion new process. If there are special requirements by the purchaser, the
supplier and the purchaser may negotiate separately.
5.2 The material of each grade can be divided into blank state and machining
state. The dimensional deviation, shape and position deviation of the material
(referred to as the shape and position deviation) can be found in Appendix A.
Special requirements can be determined by both parties through negotiation.
5.3 The additional magnetic properties and main mechanical and physical
properties of the materials are listed in Appendix B. They are for reference only
for user design and use, they are not used as the basis for acceptance and
rejection.
5.6 For the chemical composition, manufacturing process and application of the
product, see Appendix C.
5.7 For the magnetic properties unit system, conversion table and grade
Type Character grade
Principal magnetic properties Squareness
minimum value minimum value minimum value minimum value range value
6 Test methods
6.1 The principal magnetic property test methods for type N, M, H, SH and UH
materials shall be carried out in accordance with the provisions of GB/T 3217.
The principal magnetic property test methods for EH and TH materials shall be
carried out in accordance with the provisions of GB/T 29628.
6.2 The test method of the remanence temperature coefficient and the intrinsic
coercivity temperature coefficient of the material shall be carried out in
accordance with the provisions of GB/T 24270.
6.3 Product size and shape & position deviation shall be tested by gages that
meet the accuracy requirements and meet the national measurement standards,
or otherwise tested by special gauges confirmed by both parties through
negotiation.
6.4 Appearance quality of the product shall be visually inspected.
6.5 Coating test method shall be carried out in accordance with the provisions
of GB/T 34491.
6.6 The numerical rounding off shall be carried out in accordance with the
provisions of GB/T 8170.
7 Inspection rules
7.1 Inspection and acceptance
7.1.1 The product shall be inspected by the supplier’s quality inspection
department, to ensure that the materials meet the requirements of this standard,
meanwhile the quality certificate shall be filled.
7.1.2 The acquirer shall inspect the products received in accordance with the
provisions of this standard. If the inspection result is inconsistent with the
provisions of this standard, it shall be submitted to the supplier within one month
from the date of receipt of the product, to be settled through negotiation
between the supplier and the purchaser. If arbitration is required, it shall be
jointly sampled at the purchaser’s premise and tested by the organization which
is jointly recognized by both parties.
7.2 Batching
Each batch of product shall consist of the materials of the same specification
and size made by same grades through same production process.
7.3 Inspection items
Each batch of product shall be inspected for principal magnetic properties,
dimensional deviations, shape & position deviations, appearance quality or
items specified in the contract.
7.4 Sampling
The sampling quantity for inspection shall be carried out in accordance with the
provisions of GB/T 2828.1-2012.The principal magnetic property qualification
level of the product is 1.5 grades of special inspection level S2, the inspection
qualification level of the other items is grade 1.5 of inspection level II.
7.5 Determination of inspection results
8 Marking, packaging, transportation, storage and
quality certificate
8.1 Marking, packaging
8.2 Transportation, storage
The product shall be handled with care during transportation and stored in a
well-ventilated, dry, non-corrosive atmosphere.
8.3 Quality certificate
Each batch of products shall be accompanied by a quality certificate, indicating.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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