Beskrivning

Alnico materials (composed predominantly of aluminum, nickel, and cobalt with minor amounts of other elements including titanium and copper) permit design latitudes providing high indications, high energies and relatively high coercivities. Alnico magnets are characterized by excellent temperature stability and good resistance to demagnetization from vibration and shock. Alnico magnets offer the best temperature characteristics of any standard production magnet material available. They can be used for continuous duty applications where temperature extremes up to 930F can be expected.

Alnico magnets are manufactured through either a casting or sintering process. Alnico magnet is very hard and brittle. Machining or drilling can not therefore be accomplished by ordinary methods. Holes are usually cored in at the foundry. Magnets are cast or sintered as closely as possible to required sized so that abrasive grinding to finish dimensions and tolerances is minimized

Specialized casting techniques used to achieve the unique crystalline grain orientation found in the alnico 5 and 8 grades. These anisotropic grades are designed to produce high magnetic output in a specified direction. Orientation is achieved during heat treatment, by cooling the casting from 2000F at a controlled rate within a magnetic field which conforms to the preferred direction of magnetization. Alnico 5 and Alnico 8 are anisotropic and exhibit a preferred direction of orientation, Magnetic orientation should be specified on your drawing when you send an order to us.

Cast Alnico 5 is the most commonly used of all the cast Alnico's .It combines high indications with a high energy product of 5 MGOe or more and is used extensively in rotation machinery, communications, meters and instruments, sensing devices and holding applications. The higher resistance to demagnetization(coercive force) of Alnico 8,cobalt content to 35%,allows this material to function well for short lengths or for length to diameter ratios of less than 2 to 1.

Sintered Alnico materials offer slightly lower magnetic properties but butter mechanical characteristics than the cast Alnico materials. Sintered Alnico magnets are most suitable in small sizes(less than 1 oz.)in this process. The desired mix of metal powder is pressed to shape and size in a die, then sintered at 2300 F in a hydrogen atmosphere. The sintering process is well suited to large volume production, and results in parts which are structurally stronger than cast magnets. Relatively close tolerances can be achieved without grinding.

Konkurrensfördelar:
The Characteristics of Alnico Magnet:

*Small changes in magnetic properties to temperature effects
*Maximum working temperature can be as high as 450oC~550oC.
*Low coercive force.
*Strong corrosion resistance capability, no coating needed for surface protection.

• Suitable for small volume magnets with complex shape
• Compact crystal, high intensity
• Regular shape, precision size
• Even elements, stable performance
• Suitable for compound magnet
• Excellent temperature stability (temp. coefficient of Br is the smallest among all of the other permanent magnets

Specifikationer

Magnetic and Physical Properties of Cast Alnico Magnet

Grade	Equivalent MMPA Class	remanens		Tvingande kraft		Maximum Energy Product		Densitet	Reversible Temp. Coefficient	Reversible Temp. Coefficient	Curie Temp.	Temp. Coefficient	Anmärkning
		Br		HCB		(BH)max		g / cm3	α（Br）	α（Hcj）	TC	TW
		mT	Gs	KA / m	Oe	KJ/m3	MGOe		%/℃	%/℃	℃	℃
LN10	ALNICO3	600	6000	40	500	10	1.2	6.9	-0.03	-0.02	810	450	Isotropy
LNG13	ALNICO2	700	7000	48	600	12.8	1.6	7.2	-0.03	+0.02(XNUMX)XNUMX	810	450
LNGT18	ALNICO8	580	5800	100	1250	18	2.2	7.3	-0.025	+0.02(XNUMX)XNUMX	860	550
LNG37	ALNICO5	1200	12000	48	600	37	4.65	7.3	-0.02	+0.02(XNUMX)XNUMX	850	525	Anisotropy
LNG40	ALNICO5	1250	12500	48	600	40	5	7.3	-0.02	+0.02(XNUMX)XNUMX	850	525
LNG44	ALNICO5	1250	12500	52	650	44	5.5	7.3	-0.02	+0.02(XNUMX)XNUMX	850	525
LNG52	ALNIC05DG	1300	13000	56	700	52	6.5	7.3	-0.02	+0.02(XNUMX)XNUMX	850	525
LNG60	ALNICO5-7	1350	13500	59	740	60	7.5	7.3	-0.02	+0.02(XNUMX)XNUMX	850	525
LNGT28	ALNICO6	1000	10000	57.6	720	28	3.5	7.3	-0.02	+0.03(XNUMX)XNUMX	850	525
LNGT36J	ALNICO8HC	700	7000	140	1750	36	4.5	7.3	-0.025	+0.02(XNUMX)XNUMX	860	550
LNGT38	ALNICO8	800	8000	110	1380	38	4.75	7.3	-0.025	+0.02(XNUMX)XNUMX	860	550
LNGT40		820	8200	110	1380	40	5	7.3	-0.025		860	550
LNGT60	ALNICO9	900	9000	110	1380	60	7.5	7.3	-0.025	+0.02(XNUMX)XNUMX	860	550
LNGT72		1050	10500	112	1400	72	9	7.3	-0.025		860	550

Magnetic and Physical Properties of Sintered Alnico Magnet

Betyg	Equivalent MMPA Class	remanens		Tvingande kraft		Tvingande kraft		Maximum Energy Product		Densitet	Reversible Temp. Coefficient	Curie Temp.	Temp. Coefficient	Anmärkning
		Br		Hcj		HCB		(BH)max		g / cm3	α（Br）	TC	TW
		mT	Gs	KA / m	Oe	KA / m	Oe	KJ/m3	MGOe		%/℃	℃	℃
SLN8	Alnico3	520	5200	43	540	40	500	8-10	1.0-1.25	6.8	-0.02	760	450	Isotropy
SLNG12	Alnico2	700	7000	43	540	40	500	12-14	1.5-1.75	7.0	-0.014	810	450
SLNGT18	Alnico8	600	6000	107	1350	95	1200	18-22	2.25-2.75	7.2	-0.02	850	550
SLNGT28	Alnico6	1000	10000	57	710	56	700	28-30	3.5-3.8	7.2	-0.02	850	525	Anisotropy
SLNG34	Alnico5	1100	11000	51	640	50	630	34-38	3.5-4.15	7.2	-0.016	890	525
SLNGT31	Alnico8	780	7800	106	1130	104	1300	33-36	3.9-4.5	7.2	-0.02	850	550
SLNGT38		800	8000	126	1580	123	1550	38-42	4.75-5.3	7.2	-0.02	850	550
SLNGT42		880	8800	122	1530	120	1500	42-48	5.3-6.0	7.25	-0.02	850	550
SLNGT38J	Alnico8HC	730	7300	163	2050	151	1900	38-40	4.75-5.0	7.2	-0.02	850	550