What are the mechanical properties of magnet materials?

The application of sintered NdFeB permanent magnet is mainly to use its magnetic properties, but due to the different use environments and conditions, in addition to the magnetic properties requirements, there are also mechanical properties and chemical properties. For example, some permanent magnets are used in high-speed rotating machinery and are subject to great centrifugal force, or are used in vibration environments, or under extremely high acceleration (3g~5g) conditions, or when the magnet is installed, under the action of stress, the magnet It may peel off, drop edges, drop corners or cracks, etc., so it is natural to have requirements on the mechanical properties of magnets.

What are the mechanical properties of materials?

The mechanical properties of materials generally include strength, hardness, plasticity and toughness, and these mechanical properties parameters have different physical meanings.

Strength refers to the maximum ability of a material to resist external force damage. The strength is divided into:

Tensile strength (tensile strength), refers to the strength limit when the external force is tensile

Compressive strength, refers to the strength limit when the external force is pressure

Bending strength, refers to the strength limit when the external force is perpendicular to the axis of the material and the material is bent after the action

Hardness refers to the ability of a material to partially resist the pressing of hard objects into its surface. It is an index to compare the softness and hardness of various materials. The higher the hardness, the stronger the ability of the metal to resist plastic deformation.

Plasticity refers to the ability of a solid substance to resist deformation under a certain external force, and it is the ability of a material to permanently deform without being damaged under the action of external force.

Toughness refers to the ability of a material to absorb energy during plastic deformation and fracture. The better the toughness, the less likely brittle fracture will occur. In materials science and metallurgy, toughness refers to the resistance of a material to breaking when it is subjected to a force that causes it to deform. It is the ratio of the energy that a material can absorb before breaking to its volume.