Views: 0 Author: Site Editor Publish Time: 2022-12-14 Origin: Site
SmCo magnet has high magnetic energy product, extremely low temperature coefficient, maximum working temperature can reach 350 ℃, and negative temperature is unlimited. When the working temperature exceeds 180 ℃, its maximum energy product (BHmax), coercive force (coercive force), temperature stability and chemical stability are better than Nd-Fe-B permanent magnetic materials.
What is the production process of SmCo magnet?
What are the characteristics of SmCo magnets?
How are SmCo magnets produced?
Production process of samarium cobalt magnets: feeding → smelting and ingot making → spraying → pressing → sintering and tempering → magnetic test → grinding → spindle cutting → finished products.
These alloys are usually machined in a non magnetized state. Cobalt samarium wet fine grinding (water-cooled) and diamond grinding wheels. This process is required if there are drilling or other functional limitations. Due to the low flash point of cobalt and samarium, the grinding waste should not be completely dried. Small sparks, such as those generated by static electricity, are easy to burn. The temperature generated by a fire may be very high and difficult to control.
Rare earth magnet is a kind of magnetic tool material, which is made of metal rare earth materials such as samarium, cobalt, etc. by adding medicine, melting alloy, crushing, pressing and sintering. It has high magnetic energy product and extremely low temperature. The maximum working temperature can reach 350 ℃, and the negative temperature is unlimited. When the working temperature exceeds 180 ℃, its maximum magnetic energy product (BHmax), coercive force (coercive force), temperature stability and chemical stability are better than Nd-Fe-B permanent magnetic materials. It has strong corrosion resistance and oxidation resistance.
Therefore, it is widely used in aerospace, national defense industry, microwave devices, communications, medical equipment, instruments, various magnetic transmission devices, sensors, magnetic processors, motors, magnetic suspension cranes and other fields. The maximum energy product (BHmax) of cobalt samarium magnets is between 16MgOe and 32MgOe, and the theoretical limit is 34MgOe. Cobalt samarium magnets have two composition ratios, namely (samarium atom: cobalt atom) 1:5 and 2:17.
The main industrial processes for manufacturing SmCo magnets are powder metallurgy and bonding.
Reduction diffusion (r/d method) refers to the reduction of rare earth oxides with metal calcium, and the direct preparation of rare earth cobalt alloy powder through the mutual diffusion of transition metal atoms such as rare earth metals and metal cobalt. It is a rare earth cobalt alloy powder. Cheap manufacturing process. Commercial rare earth cobalt alloy powders are usually sold.
Bonding method is a manufacturing process that mixes rare earth cobalt permanent magnetic powder with binder (usually organic binder), hardens after extrusion, extrusion or injection molding, and directly obtains a permanent magnet with complex shape element.
Shine Magnetics is a company specializing in the research, development and production of magnets and magnetic products, which is applicable to various industries and customers. With appropriate knowledge and experience in this field, in view of the potential needs of customers, and combined with the wisdom of our experts, Shine Magnetics has produced recognized magnetic products.