Sintered Nd-Fe-B permanent magnet material is appeared in the early 1980s, and its composition is Nd2Fe14B. Nd-Fe-B permanent magnet is rapidly developed and widely used by virtue of its excellent performance, rich resources and reasonable price. Now, it is widely used in micro and special motor, horn, toy, permanent magnet instrument, electronic industry, automobile industry, petrochemical industry, nuclear magnetic resonance device, magnetic suspension system, magnetic transmission mechanism, magnetic therapy equipment and others. Nd-Fe-B magnet is easy to be rusted and oxidized, therefore, its surface shall be electroplated, such as galvanizing, nickeling, gold-plating, and silver plating; and also, it can be subjected to phosphating or sprayed the epoxy resin to slow down its oxidation velocity. It has excellent magnetic property and its maximum magnetic energy product is above 10 times higher than that of ferrite. Its mechanical property can also be quite good, therefore, it can be cut and processed into different shapes and drills. The maximum working temperature of the high-performance product can reach 230℃.
- Introduction
- Physical
- Diagram
- Process
- Magnetic
- Product
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●It is manufactured with powder metallurgic method.
●It is very solid and brittle.
●It has high-resistant demagnetization.
●The material has low corrosion resistance in case of failing to properly coat or electroplate.
●The high-cost/performance proportion is provided.
●The temperature stability is general.
●It is inapplicable to the high-temperature work environment.
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Project Unit Parameter range Curie temperature ℃ 310-370 Maximum working temperature ℃ 80-200 Resistivity μΩcm 160 Hardness Hv 560-580 Hardness g/cm³ 7.5 Recoil permeability μrec 1.05 kOe 30-40 Saturation magnetization kA/m 2400-3200 Temperature coefficient of remanence %/℃ -0.12 - -0.1 Temperature coefficient of intrinsic coercivity %/℃ -0.6
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38EH demagnetization graph
40uh demagnetization graph
45sh demagnetization graph
48h demagnetization graph
50m demagnetization graph
52m demagnetization graph
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Surface treatment
Kind Material Metal Zinc, nickel, nickel, copper, nickel, nickel, nickel, copper, nickel, gold, silver, tin Organic Epoxy resin spraying、Nickel and epoxy resin coating Tentative Surface passivation
Size range / General tolerances
Annular external diameter internal diameter thickness Maximum 200mm 180mm 50mm least 2.6mm 1.8mm 0.5mm tolerance ±0.1mm ±0.1mm ±0.1mm
Its tile shape and other special shapes can be produced in accordance with the customer requirement and drawing.
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Grade Remanence (minimum) Magnetic coercivity (minimum) The intrinsic coercivity (minimum) The maximum energy product (range) Maximum operating temperature ≤ Br Hcb Hcj (BH)max KGs T KOe KA/m KOe KA/m MGOe KJ/m3 ℃ N52 14.3 1.43 10.5 836 11 876 49~53 390~422 80 N50 14 1.4 10.5 836 11 876 48~51 380~406 80 N48 13.7 1.37 10.5 836 11 876 46~49 366~390 80 N45 13.3 1.33 10.8 860 12 960 42~46 335~366 80 N42 13 1.3 10.8 860 12 960 40~43 320~343 80 N40 12.7 1.27 10.8 860 12 960 38~41 302~327 80 N38 12.3 1.23 10.8 860 12 960 36~39 287~310 80 N35 11.8 1.18 10.8 860 12 960 33~37 263~295 80 N50M 14 1.4 13.1 1042 14 1114 48~51 380~406 100 N48M 13.6 1.36 12.8 1018 14 1114 46~49 366~390 100 N45M 13.3 1.33 12.5 994 14 1114 42~46 335~366 100 N42M 13 1.3 12 955 14 1114 40~43 320~343 100 N40M 12.7 1.27 11.8 939 14 1114 38~41 302~327 100 N38M 12.3 1.23 11.6 915 14 1114 36~39 287~310 100 N35M 11.8 1.18 10.8 860 14 1114 33~37 263~295 100 N50H 14 1.4 13.1 1042 17 1350 48~51 380~406 120 N48H 13.6 1.36 12.8 1018 17 1350 46~49 366~390 120 N45H 13.3 1.33 12.5 994 17 1350 42~46 335~366 120 N42H 13 1.3 12 955 17 1350 40~43 320~343 120 N40H 12.7 1.27 11.8 939 17 1350 38~41 302~327 120 N38H 12.3 1.23 11.6 915 17 1350 36~39 287~310 120 N35H 11.8 1.18 11 876 17 1350 33~37 263~295 120 N33H 11.4 1.14 10.6 844 17 1350 31~35 247~279 120 N30H 10.8 1.08 10 795 17 1350 28~32 223~255 120 N45SH 13.3 1.33 12.5 994 20 1600 42~46 335~366 150 N42SH 13 1.3 12 955 20 1600 40~43 320~343 150 N40SH 12.7 1.27 11.8 939 20 1600 38~41 302~327 150 N38SH 12.3 1.23 11.6 915 20 1600 36~39 287~310 150 N35SH 11.8 1.18 11 876 20 1600 33~37 263~295 150 N33SH 11.4 1.14 10.6 844 20 1600 31~35 247~279 150 N30SH 10.8 1.08 10 795 20 1600 28~32 223~255 150 N42UH 13 1.3 12 955 25 2000 40~43 320~343 180 N40UH 12.7 1.27 11.8 939 25 2000 38~41 302~343 180 N38UH 12.3 1.23 10.6 915 25 2000 36~39 287~310 180 N35UH 11.8 1.18 10.8 860 25 2000 33~37 263~295 180 N33UH 11.4 1.14 10.6 844 25 2000 31~35 247~279 180 N30UH 10.8 1.08 10 795 25 2000 28~32 223~255 180 N28UH 10.4 1.04 9.5 756 25 2000 26~29 207~231 200 N38EH 12.3 1.23 11.6 915 30 2400 36~39 287~310 200 N35EH 11.8 1.18 11 876 30 2400 33~37 263~295 200 N33EH 11.4 1.14 10.6 844 30 2400 31~35 247~279 200 N30EH 10.8 1.08 10 795 30 2400 28~32 223~255 200 N28EH 10.4 1.04 9.5 756 30 2400 26~29 207~231 200