Description

Alnico are precipitation hardened alloys requiring special heat treatment techniques.The raw materials used are Cobalt, Nickel, Copper, Aluminum and Iron. Titanium, silicon,etc. are added in certain proportions.The raw materials in their purest form are melted in medium frequency induction furnaces and castings are made using conventional sand or shell mould. The heat treatment consists of heating the alloy in furnace to well above its curie-point, and holding it at that temperature for some time. This is followed by controlled cooling after which the castings are reheated and held for a long period at a temperature of about 550ᵒC. This ageing process increases the coercive force and the energy product. Finally, the castings are ground to obtain close dimensional tolerances whenever necessary and inspected for physical and magnetic accuracy.

Features:

• Excellent stability over a wide range of temperatures
• Can be specified as complex and custom shapes
• Grades available for temperatures requirements up to 540°C
• Very high residual induction (Br) of up to 13.5 kG
• Magnetic properties can be tuned or adjusted after assembly

Main Application:

• Magnetic pump couplings
• Magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR)
• Traveling wave tubes (TWTs) and electron tubes
• Loudspeakers
• Generators
• Automotive, aerospace, and military sensors