Method for preparing high-performance iron nickel magnetically soft alloy by using powder metallurgy process

Abstract

The invention discloses a method for preparing high-performance iron nickel magnetically soft alloy by using a powder metallurgy process, which belongs to the technical field of powder metallurgy. The method comprises the following steps of: 1, uniformly mixing various powder such as iron powder, nickel powder, molybdenum powder, silicon powder, copper powder, cobalt powder, chrome powder, niobium powder, tungsten powder, aluminum powder and titanium powder according to a certain ratio, wherein the nickel content ranges from 30 to 78 percent; or the alloy powder prepared according to a certain alloy component ratio is directly used as a raw material; 2, forming the powder which is obtained by step 1 into a blank with a certain shape by using a powder metallurgy forming method; 3, sintering the formed blank, which is obtained by the step 2, under the pressure of between 0 and 1,000 MPa and at the temperature of between 600 and 1,500 DEG C for 10 to 4,000 minutes; and 4, processing the sintered body obtained by the step 3 under the pressure of between 0 and 4,000 MPa and at the temperature of between 600 and 1,600 DEG C for 0 and 4,000 minutes. The method has the characteristic that: by improving the sintering and thermal treatment systems, the material density is improved, the micro texture and structure of the material are improved, the impurity content is reduced, and the magnetically soft alloy product with the maximal magnetic conductivity of no less than 40 mH / m and with the coercive force of no more than 20 A / m can be prepared.

Description

technical field [0001] The invention belongs to the field of powder metallurgy, and in particular provides a method for preparing a high-performance iron-nickel system soft magnetic alloy by adopting a powder metallurgy process. Background technique [0002] The iron-nickel soft magnetic alloy with a nickel content of 30%-90% is a soft magnetic material with excellent comprehensive magnetic properties, and it is also one of the most representative alloys in soft magnetic materials. It is famous for its high magnetic permeability and low coercive force, and its application is also very extensive, especially as a magnetic conductive component, it has become an indispensable basic material for communication, radar, aerospace, computer technology, and precision instrumentation industries. With the development of magnetic circuit components towards miniaturization and multi-function, the size of the soft magnetic alloy parts used is getting smaller and smaller, and the shape is m...

AI Technical Summary

Problems solved by technology

However, when powder metallurgy is used to prepare iron-nickel soft magnetic alloys, the magnetic permeability of the prepared soft magnetic alloys is far lower than that of soft magnetic alloys prepared by smelting process due to the shortage of materials in terms of density and microstructure due to the limitation of the process. The magnetic permeability of magnetic alloys greatly limits the application of powder metallurgy iron-nickel soft magnetic alloy components in high-performance magnetic circuit components