China Neodymium And Ferrite Magnets Manufacturer & Supplier 
NdFeB magnet as a high-performance magnetic materials, in the production and use of the process will often encounter some problems, I organize some of the production process of several common problems and their corresponding solutions.
1. Magnetic properties not up to standard
Reason: inaccurate composition, uneven microstructure, inappropriate sintering temperature or time, insufficient magnetic field orientation, etc.
Solution: Accurate ingredients, optimize melting and powder making process, ensure suitable sintering conditions, strengthen magnetic field orientation.
2. Deviation in dimensional accuracy
Reason: unreasonable mold design, unstable molding pressure, improper control of sintering shrinkage.
Solution: Improve the mold design, stabilize the molding pressure, and accurately control the shrinkage in the sintering process.
Rectangular neodymium magnets with double 2 countersunk holes
3. Surface defects
Cause: surface oxidation, uneven plating or bubbles, machining damage.
Solution: Optimize the surface treatment process, improve the quality of the plating layer, and improve the machining parameters.
4. Cracking
Causes: excessive internal stress, compositional segregation, excessive cooling speed.
Solution: Reasonable control of tempering treatment, improve composition uniformity, adjust the cooling speed.
5. High scrap rate
Reason: operation is not standardized, equipment failure, detection is not strict.
Solution: strengthen staff training, regular maintenance of equipment, strict implementation of testing standards.
6. Excessive costs
Causes: Waste of raw materials, low production efficiency, high energy consumption.
Solution: Optimize the production process, reduce the generation of waste materials, improve the utilization rate of equipment and adopt energy-saving measures.
7. Poor corrosion resistance
Cause: Poor quality of plating, improper surface treatment process.
Solution: Improve the plating material and process, increase the thickness and uniformity of the plating.
8. Fragile
Cause: Insufficient sintering density, defective microstructure.
Solution: Optimize the sintering process, increase the sintering density and improve the microstructure.
9. Magnetic consistency differences
Reason: Purity of raw materials, composition ratio or batch varies greatly, temperature and time control during sintering process.
Solution: Strictly control the source of raw materials and use rare earth materials with high purity and low impurities. Precisely control the sintering temperature and time to ensure the consistency of the process.
NdFeB magnet production process involves more complex processes, quality problems may be caused by a number of links. For the specific production situation, we need to comprehensively analyze the causes of the problem, and take effective measures to improve the production quality and efficiency of NdFeB magnets.
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