Hello, welcome ShenZhen HongMing Magnetic industry Co.,LTD.


ShenZhen HongMing Magnetic industry Co.,LTD

Web site: www.szhmmag.com

Contact person: ms. Huang

Mail editor: 518103

Hand machine: +8613823610634

Machine: 0755-33888108

The true:0755-33523180

Q Q: 2300318916

Mail box: szhmmag@163.com

Address: Goldman Sachs No. 18, No. 18, Sha Jing Center Road, Baoan District, Shenzhen, Guangdong

Order notice

1, how to order the magnet?
To enable us to work with your work more effectively, we need to confirm the following:
(1), what material, performance?
(2), dimensions and tolerances?
(3), whether to magnetization, magnetization? Is the manner in which the axial? Radial?
(4) the maximum temperature of the working environment of the magnet?
(5) order quantity?
(6) surface treatment? Zinc plated, nickel plated?
(7) if special treatment is required, please let us know.


2, what is the application of neodymium iron boron magnets?
Neodymium iron boron permanent magnet with its excellent performance, rich raw materials, reasonable prices are being able to rapid development and extensive application. Its main application in micro motor, permanent magnetic instrument, electronic industry, automobile industry, petroleum chemical, nuclear magnetic resonance device, sensor, sound equipment, magnetic suspension system, magnetic transmission mechanism and magnetic therapy equipment aspects.


3, magnetic material analogy
Low performance and medium, low price, good temperature characteristics, corrosion resistance, good performance and price ratio;
The highest performance of neodymium iron boron, the price, the strength is good, not resistant to high temperature and corrosion;
SmCo performance is high, the highest price, crisp, temperature characteristics and corrosion resistance;
Aluminum nickel cobalt low performance and in the price, the temperature characteristics, corrosion resistance, poor resistance to interference;
SmCo, ferrite, neodymium iron boron can be produced by sintering and bonding method, sintering magnetic properties are high, molding is poor, good adhesion magnets, a lot of performance reduction;
AlNiCo can be made by casting and sintering process, the casting magnet has high performance, good formability, low sintering magnet and good formability.


4, neodymium iron boron made of those materials?
Neodymium iron boron permanent magnet of the main raw materials are adding neodymium (nd) 64% with 32%, metal iron (FE) and non metal boron (b) 1% (a small amount of dysprosium (Dy), terbium (TB), cobalt (CO), niobium (NB) and gallium (GA), aluminum (AL), copper (Cu) and other elements). The permanent magnetic material of the three element of the Nd Fe B is based on the Nd2Fe14B compound, and its composition should be similar to that of the compound Nd2Fe14B. However, when the distribution ratio is Nd2Fe14B, the magnetic properties of the magnets are very low, even without magnetic field. The content of Nd and B in the actual magnet is much better than that of the neodymium and the boron content of the Nd2Fe14B compound to obtain better permanent magnetic properties.


5, neodymium iron boron magnetic can last how long?
NdFeB magnet has high coercive force, natural environment and the general conditions of the magnetic field and magnetic demagnetization will not change. Assuming that the environment is appropriate, even after a long period of use, the magnetic energy loss of the magnet will not be very large. So in practical applications, we often ignore the influence of time factor on magnetic properties.


6, on the direction of orientation
Orientation: the direction of the best magnetic properties of the magnet can be referred to as the orientation of the magnet. The magnet is divided into:
(1) isotropic magnets: any direction of the same magnetic properties of the magnet
(2) the magnetic properties in different directions are different, and there is one direction that is the orientation of the magnetic properties. Sintered NdFeB permanent magnet is anisotropic magnet, so the production before the need to determine the direction of orientation (magnetizing direction).


7. Factors affecting the magnetic force of Nd Fe B magnets?
Ambient temperature, the sintering neodymium iron boron is extremely sensitive to the operating temperature, environment of the instantaneous maximum temperature and maximum temperature may have different degrees of demagnetization of the magnets, including the reversible and irreversible, recoverable and unrecoverable.


8, neodymium iron boron magnet working temperature range is how?
The temperature limit of the neodymium iron boron magnet has caused a series of grades of magnets to meet the different requirements of the working temperature. Please refer to our performance catalog to compare the working temperature range of each magnet. The maximum operating temperature should be confirmed before selecting a neodymium iron boron magnet.


9, how to shield the magnetic field?
In general we use ordinary iron shielding magnetic field. Magnetic shielding need high permeability materials and meet the requirements of the material is an alloy of iron and nickel. The material has high permeability. When the need to shield the magnetic field is very strong, only with a single layer of shielding material, not up to the requirements of the shield, it will occur saturation. At this time, one way is to increase the thickness of the material. But a more effective way is to use a combination of shielding, a shield placed in another shield in the body, there is a gap between them. The air gap can be filled with any non permeability materials such as aluminum support. The shielding effectiveness of the combined shield is much higher than that of the single shield, so the combination shield can attenuate the magnetic field to a very low degree.


10. What are the precautions for the storage and transportation of magnets?
The magnet in storage to keep the room ventilated dry, otherwise the wet environment is easy to cause corrosion of the magnet. Environmental temperature should not exceed maximum working temperature of the magnet; not the electroplating products when stored properly oiled to prevent rust; magnetizing products stored should be sensitive to the magnetic field away from the disk, magnetic card, magnetic tape, computer monitors, watches and other objects. Magnet material is brittle, transportation, plating (coating), installation process, should ensure that the magnet is not affected by the severe impact, if the method inappropriate, may give rise to magnetic breakage, cracking; magnet magnetization state transportation should shield, especially air transport must be completely shielded.


11, what is the operation of the magnet attention?
Magnet in the use of the process should be to ensure that the workplace clean, otherwise easy to adsorption