Sintered AlNiCo Magnets 20160523
Custom AlNiCo Rare Earth Permanent Magnets
Sintered alnico magnets produced by powder metallurgy technology. According to comprehensive introduction to alnico in Wikipedia, material composition of alnico permanent magnet includes aluminum, nickel, cobalt, aluminum, nickel, cobalt, copper, titanium, iron, and niobium. But not every grade of alnico rare earth magnet includes all of the aforementioned materials. For example, grade Alnico 1 is usually referred to as aluminum-nickel alloy, which means it does not contain cobalt, and grades below alnico 5 do not contain titanium. Generally, alnico magnets are iron based alloy with iron taking the largest proportion of raw material, aluminum taking less than 8%, and cobalt 38% or less.
Technological properties of sintered Alnico magnets: metal powder mixture is molded into blank with different sizes by press mold; the raw material blank will be sintered in vacuum or gas protection furnace; the alloyed blank will have heat treatment, thus magnetism is achieved. Magnets produced by the above technologic process are characterized by their simple shapes, which is mainly because the powder press molding is not suitable for complex shapes manufacturing. In addition, high dimensional precision is a main characteristic of powder press molding. Different from wire cutting technique for neodymium magnet , sintered alnico magnets are usually produced by single shot shaping technique which makes alnico magnets very suitable to be applied in high precision magnetic parts.
The magnetic strength of sintered alnico magnets is slightly weaker than that of cast alnico permanent magnets. The strongest trait of alnico magnets is the consistency of magnetic performance. Alnico rare earth magnets are excellent high temperature resistant magnetic material with temperature coefficient -0.01%/C~-0.02%/C. Thus, they are most widely used in electric meters, motors, magnetic sensors, instruments, relays and other high temperature, high precision magnetic parts.
Sintered alnico magnets produced by powder metallurgy technology. According to comprehensive introduction to alnico in Wikipedia, material composition of alnico permanent magnet includes aluminum, nickel, cobalt, aluminum, nickel, cobalt, copper, titanium, iron, and niobium. But not every grade of alnico rare earth magnet includes all of the aforementioned materials. For example, grade Alnico 1 is usually referred to as aluminum-nickel alloy, which means it does not contain cobalt, and grades below alnico 5 do not contain titanium. Generally, alnico magnets are iron based alloy with iron taking the largest proportion of raw material, aluminum taking less than 8%, and cobalt 38% or less.
Technological properties of sintered Alnico magnets: metal powder mixture is molded into blank with different sizes by press mold; the raw material blank will be sintered in vacuum or gas protection furnace; the alloyed blank will have heat treatment, thus magnetism is achieved. Magnets produced by the above technologic process are characterized by their simple shapes, which is mainly because the powder press molding is not suitable for complex shapes manufacturing. In addition, high dimensional precision is a main characteristic of powder press molding. Different from wire cutting technique for neodymium magnet , sintered alnico magnets are usually produced by single shot shaping technique which makes alnico magnets very suitable to be applied in high precision magnetic parts.
The magnetic strength of sintered alnico magnets is slightly weaker than that of cast alnico permanent magnets. The strongest trait of alnico magnets is the consistency of magnetic performance. Alnico rare earth magnets are excellent high temperature resistant magnetic material with temperature coefficient -0.01%/C~-0.02%/C. Thus, they are most widely used in electric meters, motors, magnetic sensors, instruments, relays and other high temperature, high precision magnetic parts.
