Magnet expert

15 Years Manufacturing Experience

Round NdFeb, generally applied into electroacoustic

Short Description:

Round Ndfeb is often used in motors, loudspeakers, sensors, electronic products, packaging magnetic and so on. Taking loudspeaker as an example, the product performance of magnetic steel directly affects the quality and working life of the loudspeaker.

Our company provides professional technical support to help customers customize NdFeb products according to different application needs, and formulate corresponding solutions according to the actual problems encountered by customers in practical process.

Product Detail

Product Tags

We use no-dysprosium formula on round-low-grade products for customers to reduce costs. We have a stable formula which can be made into low temperature coefficient products. It reduces costs and increases efficiency further for customers with strictly control the tolerance in processing and the coating according to different requirements of customers to ensure the stability of plating protection at the same time, including salt spray, coating binding force, colloid affinity and so on.

Round products are prone to missing corners in the production process. So we have automatic full inspection equipment for appearance tolerances, which can ensure product defects within the controllable range and avoid defective products in using process.

In terms of flux consistency, we ensure fixed-point sintering furnace to the consistency of magnet process control, and magnetic flux full inspection equipment to prevent weak magnetic products from flowing to customers. In terms of magnetization packaging, our company has track automatic coding magnetization equipment to prevent personnel from mischarging the magnetic charge.

In terms of delivery control, a large number of multi-line cutting machines, slicing units, mature technical processing workers, perfect product process monitoring, each step of product processing and production can get progress feedback at any time, mature cylindrical product production line, to ensure customer control requirements for product delivery, as well as controllable production progress.

NdFeB Production Process


Coating Introduction

Surface Coating Thickness μm Color SST Hours PCT Hours
Nickel Ni 10~20  Bright Silver >24~72 >24~72
Black Nickel Ni+Cu+Ni  10~20 Bright Black   >48~96 >48
Cr3+Zinc Zn
5~8 Brighe Blue
Shining Color
Sn Ni+Cu+Ni+Sn 10~25 Silver >36~72 >48
Au Ni+Cu+Ni+Au 10~15 Gold >12 >48
Ag Ni+Cu+Ni+Ag 10~ 15 Silver >12 >48
Epoxy 10~20 Black/Grey >48 ---
Ni+Cu+Epoxy 15~30  >72~108 ---
Zn+Epoxy 15~25  >72~108 ---
Passivation --- 1~3 Dark Grey Temporary Protection ---
Phosphate --- 1~3 Dark Grey Temporary Protection) ---

Physical Characteristics

Item Parameters Reference Value Unit
Auxiliary Magnetic
Reversible Temperature Coefficient Of Br -0.08--0.12 %/℃
Reversible Temperature Coefficient Of Hcj -0.42~-0.70      %/℃
Specific Heat 0.502    KJ·(Kg ·℃)-1
Curie Temperature  310~380      
Mechanical Physical
Density 7.5~7.80   g/cm3
Vickers Hardness 650      Hv
Electrical Resistance 1.4x10-6        μQ ·m
Compressive Strength 1050   MPa
Tensile Strength 80     Mpa
Bending Strength 290      Mpa
Thermal Conductivity 6~8.95 W/m ·K
Young's Modulus 160  GPa
Thermal Expansion(C⊥) -1.5     10-6/℃-1
Thermal Expansion(CII) 6.5 10-6/℃-1

Picture Display

qwe (1)
qwe (2)
qwe (3)
qwe (4)

  • Previous:
  • Next: