NB/T 10212-2019 English PDFUS$349.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. NB/T 10212-2019: Sintered neodymium iron boron permanent magnets for wind turbine generator Status: Valid
Basic dataStandard ID: NB/T 10212-2019 (NB/T10212-2019)Description (Translated English): Sintered neodymium iron boron permanent magnets for wind turbine generator Sector / Industry: Energy Industry Standard (Recommended) Classification of Chinese Standard: F11 Classification of International Standard: 27.180 Word Count Estimation: 15,13 Date of Issue: 2019-06-04 Date of Implementation: 2019-10-01 Regulation (derived from): Natural Resources Department Announcement No. 7 of 2019 Issuing agency(ies): National Energy Administration NB/T 10212-2019: Sintered neodymium iron boron permanent magnets for wind turbine generator---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Sintered neodymium iron boron permanent magnets for wind turbine generator NB ICS 27.180 F 11 Energy Industry Standards of the People's Republic of China Replace NB/T 31043-2012 Sintered NdFeB magnet for wind generator 2019-06-04 released 2019-10-01 implementation Issued by National Energy Administration Table of contentsForeword...II 1 Scope...1 2 Normative references...1 3 Terms and definitions...1 4 Requirements...2 5 Test method...4 6 Inspection rules...6 7 Packaging, transportation, storage...8 8 Random files...8 Appendix A (informative appendix) Other mechanical and physical properties of sintered NdFeB magnets for wind turbines...10 Appendix B (informative appendix) Anti-corrosion performance of magnet surface coating...11 Appendix C (informative appendix) Grain boundary diffusion technology...12 Appendix D (Normative Appendix) Measuring method of resistivity of sintered NdFeB permanent magnet materials...13ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard was proposed by the National Energy Administration. This standard is under the jurisdiction of the Wind Power Machinery and Equipment Subcommittee of the Wind Power Standardization Technical Committee of the Energy Industry (NEA/TC1/SC5). This standard was drafted by. Beijing Goldwind Kechuang Wind Power Equipment Co., Ltd., Hohhot Branch of Chinese Academy of Agricultural Mechanization Science Co., Ltd., Baotou Tianlong Permanent Magnet Motor Manufacturing Co., Ltd., China Institute of Metrology, Yantai Zhenghai Magnetic Materials Co., Ltd. Company, Jiangxi Jinli Permanent Magnet Technology Co., Ltd., Hangzhou Siya Anticorrosive Material Co., Ltd., Fujian Changting Jinlong Rare Earth Co., Ltd., Zhejiang Dongyang Dongci Rare Earth Co., Ltd., Jingci Material Technology Co., Ltd., CRRC Zhuzhou Electric Co., Ltd., CRRC Yongji Electric Co., Ltd., Nanjing Steam Turbine Changfeng New Energy Co., Ltd., Xinjiang Goldwind Technology Co., Ltd. The main drafters of this standard. Li Feifei, Ren Jun, Gong Qiang, Zhang Shifu, He Jian, Yu Yongjiang, Wang Dong, Mao Huayun, Shu Kangying, Huang Qing Fang, Hao Zhongbin, Shi Rongying, Li Jinze, Duan Zhiqiang, Li Zixuan, Ren Xiuming, Wang Gang, Song Quan. Sintered NdFeB magnet for wind generator1 ScopeThis standard specifies the requirements, test methods, inspection rules, packaging, transportation and storage of sintered NdFeB magnets for wind turbines. This standard applies to sintered NdFeB magnets for wind turbines.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GB/T 1423 Test method for the density of precious metals and their alloys GB/T 3217 Permanent magnetic (hard magnetic) material magnetic test method GB/T 5210 Paint and varnish pull open adhesion test GB/T 6329 Determination of tensile strength of adhesive butt joints GB/T 6525 Determination of room temperature compressive strength of sintered metal materials GB/T 9286 Cross-cut test of paint and varnish film GB/T 9637 Electrical Engineering Terminology Magnetic Materials and Components GB/T 13560 Sintered NdFeB permanent magnet material GB/T 17951 General technical conditions for hard magnetic materials GB/T 24270 Measuring method for temperature coefficient of magnetic properties of permanent magnet materials GB/T 30790.1 Paint and varnish protective coating system for corrosion protection of steel structures Part 1.General GB/T 30790.2 Paint and varnish protective coating system for corrosion protection of steel structure Part 2.Environmental classification GB/T 30790.6 Paint and varnish protective coating system for corrosion protection of steel structure Part 6.Laboratory performance test method GB/T 31967.2 Test methods for physical properties of rare earth permanent magnetic materials Part 2.Determination of bending strength and fracture toughness GB/T 34491 Sintered NdFeB surface coating IEC 60404-14 Magnetic Materials Part 14.Method of measuring the magnetic dipole moment of ferromagnetic material samples by extraction method or rotation method3 Terms and definitionsThe following terms and definitions defined in GB/T 9637, GB/T 17951, and GB/T 3217 apply to this document. 3.1 Sintered neodymium iron boron permanent magnet material for wind turbine generators Sintered neodymium iron boron permanent magnet material used to make permanent magnets for wind turbine generators, referred to as materials in this standard. 3.2 Sintered neodymium iron boron magnets for wind turbines The finished permanent magnets for wind turbines made of sintered neodymium iron boron permanent magnet materials, referred to as magnets in this standard. 3.3 Permanent magnet matrix The part that does not contain the covering layer (coating/plating layer) in the finished magnet is referred to as the matrix in this standard.4 Technical requirements4.1 Dimensions Unless otherwise specified, the main dimensions and general dimensions of the magnet should meet the requirements of GB/T 13560. 4.2 Magnetic properties 4.2.1 Overview For wind turbines, the determination of the magnetic performance parameters should follow. obtain the maximum magnetic energy product, ensure higher remanence, and increase the power density of the motor. Degree, reduce the coercivity within the allowable range to reduce the content of heavy rare earths and save costs; high-temperature magnetic performance should follow. ensure that the generator is in the design No demagnetization occurs under various operating conditions within the operating temperature. 4.2.2 Magnetic properties at room temperature The main magnetic performance parameters of the material at 20℃～23℃, including residual magnetic induction intensity Br, magnetic induction intensity coercive force HcB, intrinsic coercivity Force HcJ, maximum magnetic energy product (BH)max, squareness Hk/HcJ, demagnetizing field HD that causes the maximum allowable magnetic flux loss. 4.2.3 High temperature magnetic properties Draw the magnetic performance curve of the material at 60℃, 80℃, 100℃, 120℃ and 150℃, and calculate the temperature coefficient of remanence and intrinsic correction The temperature coefficient of coercivity, the base temperature of the temperature coefficient is 20℃, and the upper limit temperature is determined by the buyer according to the working temperature of the magnet. 4.2.4 Consistency 4.2.4.1 Magnetic dipole moment consistency The deviation of the magnetic dipole moment of the same batch of magnets at the same equipment and at the same temperature from the average value is within ±1%. 4.2.4.2 Magnetic performance consistency Detected at the same equipment and at the same temperature (20℃～23℃), the temperature fluctuation is ±0.5℃, the remanence and flatness of the same magnet at different positions The deviation of the mean value is within ±0.5%, and the magnetic induction intensity coercive force and intrinsic coercive force must be greater than or equal to the minimum value required by the design. 4.3 Mechanical physical properties The main mechanical and physical properties of the material are shown in Table 1. The supplier shall provide the buyer with the electrical resistivity of materials perpendicular to the orientation direction and parallel to the orientation direction to meet the requirements of the generator design of the buyer. demand. For other mechanical and physical properties of the material, see Appendix A, which is only for reference by the purchaser for design and use, and not as a basis for acceptance. 4.4 Shape defects The color of the coating on the surface of the magnet is uniform, and it is strictly prohibited to have oil stains, water stains, sweat stains, dust, metal shavings and other dirt and debris. The magnet should not have The specific requirements for obvious cracks, pores, impurities, etc. that affect the use are negotiated by both parties. 4.5 Bonding strength According to the fixing method of the magnet, the bonding strength between the coating surface of the magnet and the adhesive for fixing the magnet is tested if necessary. Strong bonding The determination of the degree standard shall be separately agreed by both parties. 4.6 Environmental performance of the substrate 4.6.1 Weightlessness After testing in accordance with regulations, the sample should not be mechanically damaged, and its mass loss per unit surface area is less than 0.2mg/cm2.Type-tested Under the conditions, the mass loss per unit surface area is less than 2mg/cm2. 4.6.2 Thermal demagnetization After the test is carried out according to the regulations, the saturated magnetized sample should not be mechanically damaged, and the irreversible loss of the magnetic dipole moment shall meet the requirements of Table 2. Note. The grade of the grain boundary diffusion magnet is subject to the grade of the penetrated part. 4.7 Magnet surface coating 4.7.1 Anti-corrosion performance The assessment of the surface covering layer of the magnet for wind turbines shall be carried out for the finished magnet, according to GB/T 30790.1, GB/T 30790.2 And GB/T 30790.6 atmospheric corrosion grade, durability grade and typical environmental examples, Appendix B recommends the surface coating types in each corrosion Application in the environment. Under the specified test methods, there should be no bubbles, delamination, peeling and corrosion on the surface of the magnet. Special requirements by supply and demand The parties negotiated to determine. The appropriate surface covering layer should be selected according to the use environment of the magnet, and the surface covering layer of the magnet should at least meet the requirements of GB/T 34491. 4.7.2 Bond strength According to the GB/T 9286 test, the adhesion test result of the covering layer is 0 grade. When type testing, it needs to be tested according to GB/T 5210 The bonding strength between the covering layer and the substrate should not be less than 10MPa. 4.8 Technical requirements for grain boundary diffusion The direction of grain boundary diffusion is determined by the buyer according to the generator design requirements, such as six-sided diffusion, single-sided diffusion, lateral diffusion, local diffusion Please refer to Appendix C for detailed technical description. Grain boundary diffusion magnets have different performance parameters in the direction of grain boundary diffusion, so special requirements are required as shown in Table 3.Sample thickness It should be able to represent the performance of magnets with different diffusion depths, and the thickness should be as small as possible in order to show the gradient of magnetic properties. Consistency in magnetic properties During the inspection, the sampling positions should be distributed as far as possible in each position of the magnet. 4.2.4.25 Test method5.1 Dimensions Product size, shape and position deviation are tested by measuring tools that meet the accuracy requirements and meet the national measurement standards, or negotiated and confirmed by the supplier and the buyer Dedicated measuring tool testing. 5.2 Magnetic properties 5.2.1 Normal temperature magnetic performance and high temperature magnetic performance Normal temperature magnetic properties and high temperature magnetic properties should be implemented in accordance with the methods of GB/T 3217 and GB/T 24270.The surface of the sample is polished, unplated, No damage, measure the magnetic properties of the material at 20℃, 60℃, 80℃, 100℃, 120℃, 150℃, etc., and draw the demagnetization curve. 5.2.2 Magnetic dipole moment consistency The consistency of the magnetic dipole moment is implemented in accordance with the method specified in IEC 60404-14. 5.2.3 Magnetic performance consistency The test sample for the consistency of magnetic properties shall meet the requirements specified in GB/T 3217.Cut out 9 specimens on a substrate, and the surface is polished, No electroplating, no damage, while testing according to GB/T 3217, drawing the same equipment and the same temperature in the range of 20℃～23℃ Magnetic curve, and count the deviation of the residual magnetism of different parts from the average value, and the magnetic induction intensity coercive force and intrinsic coercive force. 5.3 Mechanical and physical properties 5.3.1 The density shall be implemented in accordance with the method specified in GB/T 1423. 5.3.2 The compressive strength shall be implemented in accordance with the method specified in GB/T 6525. 5.3.3 The bending strength shall be implemented in accordance with the method specified in GB/T 31967.2. 5.4 Shape defects Shape defects are detected by visual methods. 5.5 Bond strength The test method is as follows. a) For finished magnets that have not been magnetized after surface treatment, coat a layer of magnet adhesive evenly on the surface in the direction of the magnetic field orientation. Coat the magnet The surface of the adhesive is placed horizontally; b) 45 The inspection requirements of the factory test are as follows. a) In the factory test, if the random inspection is unqualified, double the number of unqualified items in the same batch of products shall be taken for re-inspection. If it is qualified, the same batch of products should be fully inspected; b) When the product is unqualified during the inspection process or quality problems occur during the use process, the purchaser will increase the sampling inspection ratio as needed. c) The first batch of product sampling needs can increase the sampling rate or full inspection according to needs; d) The factory test is carried out in accordance with the inspection items and requirements specified in Table 4, and the supplier’s quality inspection department has passed the inspection and issued the product certificate Can leave the factory; e) The supplier of the first product should conduct a test on the test bench for each content in the technical parameters, and the test data should meet the technical requirements. The requirements in the technical parameters, and make inspection records and leave the factory together with the product as a random document; f) If the data in the test file has a unit, the unit should be indicated, and the unit of the international system of units should be adopted. 6.2 Type test 6.2.1 General requirements The type test is generally carried out every year, sampling is carried out according to 6.2.2, and the type test report is provided to the buyer. In addition, in the following cases, Type test is also required. a) At the time of trial formulation appraisal of new products; b) When there are major changes in product design, process, etc.; c) When the result of the factory test is quite different from the previous type test; d) When the purchaser considers it necessary to carry out type test; e) When a major performance deviation occurs during use; f) When the national quality supervision agency requires type testing. 6.2.2 Sampling rules Sampling shall be taken jointly by the supplier and the buyer on the supplier's production line. When the buyer cannot be present due to other reasons, the supplier can obtain Self-sampling after consent. The sample should be able to reflect the average level and quality stability distribution of different heats and batches. 6.2.3 Inspection items and requirements The type test includes all factory test items and environmental test items, and is carried out in accordance with the type test conditions in Chapter 5.The inspection results should Meet all requirements of this standard. Table 5 lists other type test items in addition to the factory test items. 7 Packaging, transportation and storage 7.1 Packaging Product packaging should meet the following requirements. a) The magnet should clearly distinguish between N pole and S pole; b) The product should be cleaned up before packaging, and the surface is strictly prohibited from oil stains, water stains, sweat stains, dust, metal shavings and other dirt and debris. Products should Use plastic bags, film-coated metal bags or other suitable moisture-proof and oil-proof packaging to seal the package, and take dry and moisture-proof measures; c) Magnet gaskets should be made of plastic or rubber gaskets made of genuine raw materials, and the moisture content of the gaskets should be strictly tested. Can exceed 5% (recycled gaskets must be dried and cleaned before they can be used again), and the gasket thickness should not be less than 8mm; d) The outer packing box should use a solid box to avoid magnet damage caused by external bumps during storage and transportation; e) The packaging box should be marked with the product name, supplier's name, supplier's factory year and month, production batch number, product quantity and moisture-proof bumping. 7.2 Transportation Measures should be taken during the transportation of the product to prevent damage to the product due to shaking, mutual collision, and mutual friction, and avoid humidity, high temperature, and vibration. Moving, collision, high throwing, high falling, the landing distance should not be greater than 0.5m, and the packaging box should not be flipped back and forth. In the process of shipping to the user designated location The packaging should be intact and undamaged. 7.3 Storage The product should be stored in a clean, ventilated, dry place, protected from rain, snow, and water, and long-term exposure in the open air is not allowed. Storage environment is not There should be acid, alkali, and salt atmosphere, and the packaging should be intact during the storage period.8 Random files8.1 Random file content Random documents should include. a) Product qualification certificate; b) Project inspection report; c) Product packing list. 8.2 Random document requirements Random documents should meet the following requirements. a) The identification of all inspection and inspection reports should be consistent with the product serial number, and the various test reports of a batch of products should be bound together. Copies as random documents; b) The factory test documents should be shipped with the product at the same time, and sent to the designated place as required by the demander for acceptance by the receiver.Appendix A(Informative appendix) Other mechanical and physical properties of sintered NdFeB magnets for wind turbines Unless otherwise specified in the contract or detailed specifications, other mechanical and physical properties of sintered NdFeB magnets for wind turbines are shown in Table A.1. For reference when designing and selecting materials, not as a basis for acceptance. Table A.1 Performance standard value test method Mechanical physical propertiesAppendix B(Informative appendix) Anti-corrosion performance of magnet surface coatingAppendix C(Informative appendix) Grain boundary diffusion technology Grain boundary diffusion technology can significantly increase the coercive force of the magnet while keeping the remanence not significantly reduced, and it can also effectively reduce Dy or Tb.......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of NB/T 10212-2019_English be delivered?Answer: Upon your order, we will start to translate NB/T 10212-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of NB/T 10212-2019_English with my colleagues?Answer: Yes. 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