Permanent magnet materials and hardware components

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NdFeB

Neodymium iron boron: It is a tetragonal crystal formed by neodymium, iron, and boron (Nd2Fe14B). Its main raw materials include rare earth metal neodymium 29% -32.5%, metallic elements iron 63.95% -68.65%, non-metallic elements boron 1.1% -1.2%, added elements such as dysprosium 0.6% -8% niobium 0.3% -0.5% aluminum 0.3% -0.5% copper 0.05% -0.15%.

Sintered neodymium iron boron permanent magnet materials have excellent magnetic properties and are widely used in fields such as electronics, power machinery, medical equipment, toys, packaging, hardware machinery, aerospace, etc. Common ones include permanent magnet motors, speakers, magnetic separators, computer disk drives, magnetic resonance imaging equipment instruments, etc.

Process flow: batching → melting and ingot making/strip throwing → powder making → molding → sintering and tempering → magnetic testing → grinding processing → pin cutting processing → electroplating → finished product. The ingredients are the foundation, and sintering and tempering are the key.

Production tools and performance testing tools for Nd-Fe-B magnet blanks: smelting furnace, belt throwing furnace, jaw crusher, air flow mill, press forming machine, vacuum packaging machine, isostatic press, sintering furnace, heat treatment Vacuum furnace, magnetic property tester, Gauss meter.

Neodymium iron boron magnet machining tools: centerless grinding, rounding machine, double end grinding, flat grinding, slicing machine, double-sided grinding, wire cutting, bench drill, irregular grinding, etc.

Surface treatment of neodymium iron boron: Common surface treatment methods: 1. Non coating treatment of nano (Royce3010) chelating film; 3010 refers to the film layer containing 3 or more active chelating groups, with a thickness of 10 nanometers; 2. Phosphating; 3. Electroplating; 4. Electrophoresis; 5. Vacuum vapor deposition; 6. Chemical plating; 7. Organic spray molding.

The company has a complete industrial chain, providing one-stop services from raw materials, production, processing, sales to after-sales service.

Physical properties of neodymium iron boron

Category Parameter   Unit Reference value
Mechanical and physical properties Density g/cm2 7.40~7.70
Vickers Hardness HV 500~700
Compressive Strength MPa 1000~1100
Tensile Strength MPa 80~90
Bending Strength MPa 150~400
Thermal Conductivity W/(m.K) 8~10
Young's modulus Gpa 150~200
Resistivity C//(20℃) μΩ·m 1.4~1.6
C丄(20℃) μΩ·m 1.2~1.4
Thermal expansion coefficient C//(20℃~100℃) 10-6/K 4~9
C丄(20℃~100℃) 10-6/K -2~0
Maximum Service Temperature

 N ℃ ≤80
M ℃ ≤100
H ℃ ≤120
SH ℃ ≤150
UH ℃ ≤180
EH ℃ ≤200
TH ℃ ≤230

Note 1: C//is the value measured in the direction of easy magnetization, and C Å is the value measured perpendicular to the direction of easy magnetization.

Note 2: The maximum operating temperature is related to the design and size of the magnet application.

Performance parameter table of neodymium iron boron

Breed Character grade Simplified code Main magnetic properties Squareness
Br HcJ HcB

(BH)max

 Hk/HcJ
T KG kA/m kOc kA/m kOe kJ/㎡ MGOe %
Min Min Min Range Value Min
N S-NdFeB-430/88 N54 1.45 14.5 875 11 836 10.5 406~438 51~55 95
S-NdFeB-415/96 N52 1.42 14.2 960 12 836 10.5 390~422 49~53 95
S-NdFeB-400/96 N50 1.39 13.9 960 12 836 10.5 374~406 47~51 95
S-NdFeB-380/96 N48 1.37 13.7 960 12 836 10.5 358~390 45~49 95
S-NdFeB-360/96 N45 1.33 13.3 960 12 860 10.8 342~366 43~46 95
S-NdFeB-335/96 N42 1.29 12.9 960 12 860 10.8 318~342 40~43 95
S-NdFeB-320/96 N40 1.26 12.6 960 12 860 10.8 302~326 38~41 95
S-NdFeB-300/96 N38 1.23 12.3 960 12 860 10.8 287~310 36~39 95
S-NdFeB-280/96 N35 1.18 11.8 960 12 860 10.8 263~287 33~36 95
M S-NdFeB-415/104 N52M 1.42 14.2 1035 13 995 12.5 390~422 49~53 95
S-NdFeB-400/111 N50M 1.39 13.9 1114 14 1035 13.0 374~406 47~51 95
S-NdFeB-380/111 N48M 1.37 13.7 1114 14 1012 12.7 358~390 45~49 95
S-NdFeB-360/111 N45M 1.33 11.8 1114 14 971 12.2 342~366 43~46 95
S-NdFeB-335/111 N42M 1.29 12.9 1114 14 938 11.8 318~342 40~43 95
S-NdFeB-320/111 N40M 1.26 12.6 1114 14 910 11.4 302~326 38~41 95
S-NdFeB-300/111 N38M 1.23 12.3 1114 14 876 11.0 287~310 36~39 95
S-NdFeB-280/111 N35M 1.18 11.8 1114 14 860 10.8 263~287 33~36 95
 
 
 
H 
 
 
 
 		 S-NdFeB-400/127 N50H 1.39 13.9 1274 16 1035 13.0 374~406 47~51 95
S-NdFeB-380/127 N48H 1.37 13.7 1274 16 1000 12.8 358~390 45~49 95
S-NdFeB-360/135 N45H 1.33 13.3 1353 17 995 12.5 342~366 43~46 95
S-NdFeB-335/135 N42H 1.29 13.7 1353 17 957 12.0 318~342 40~43 95
S-NdFeB-320/135 N40H 1.26 12.6 1353 17 930 11.7 302~326 38~41 95
S-NdFeB-300/135 N38H 1.23 12.3 1353 17 910 11.4 287~310 36~39 95
S-NdFeB-280/135 N35H 1.18 11.8 1353 17 876 11.0 263~287 33~36 95
S-NdFeB-260/135 N33H 1.14 11.4 1353 17 844 10.6 247~271 31~34 95
SH

 S-NdFeB-380/151 N48SH 1.37 13.7 1512 19 995 12.5 390~422 49~53 95
S-NdFeB-360/159 N45SH 1.33 13.3 1592 20 1035 13.0 374~406 47~51 95
S-NdFeB-335/159 N42SH 1.29 12.9 1592 20 1012 12.7 358~390 45~49 95
S-NdFeB-320/159 N40SH 1.26 12.6 1592 20 971 12.2 342~366 43~46 95
S-NdFeB 300/159 N38SH 1.23 12.3 1592 20 938 11.8 318~342 40~43 95
S-NdFeB-280/159 N35SH 1.18 11.8 1592 20 910 11.4 302~326 38~41 95
S-NdFeB-260/159 N33SH 1.14 11.4 1592 20 876 11.0 287~310 36~39 95
UH
 S-NdFeB-360/191 N45UH 1.33 13.3 1592 24 976 12.2 342~366 43~46 95
S-NdFeB-335/199  N42UH 1.29 12.9 1911 25 938 11.8 318~342 40-43 90
S-NdFeB-320/199 N40UH 1.26 12.6 1990 25 912 11.5 302~326 38~41 90
S-NdFeB-300/199 N38UH 1.23 12.3 1990 25 886 11.1 287~310 36~39 90
S-NdFeB-280/199 N35UH 1.18 11.8 1990 25 845 10.6 263~287 33~36 90
S-NdFeB-260/199 N33UH 1.14 11.4 1990 25 816 10.3 247~271 31~34 90
S-NdFeB-240/199  N30UH 1.08 11.4 1990 25 756 9.5 223~247 28~31 90

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