铁磁体材料磁化时产生尺寸变化的现象称作为磁致伸缩现象。磁致伸缩实质上是由于被磁化材料原子的正负磁极随着磁场方向旋转、排列而引起的材料微塑变形。美国刀具制造业近来创造了磁化处理消除刀具应力的新工艺方法。它将铁磁体刀具放置在一个高强度脉冲磁场中,每秒钟重复变化磁场方向若干次,利用磁致伸缩引起刀具材料内部振动,使得应力消除或残余应力均布。实验表明,磁化处理工艺具有广泛的适用性,它可对高速钢、优质钴合金钢、硬质合金等刀具以及氮化钛、碳化钛等涂层刀具进行消除应力的磁化处理,在提高刀具寿命方面效果显著。下表为经过 Ferromagnetic material when the size of the magnetization phenomenon is called the phenomenon of magnetostriction. Magnetostrictive material is essentially due to the positive and negative poles of the magnetized material with the direction of the magnetic field rotation, arrangement caused by micro-plastic deformation of the material. Recently, the US tool manufacturing industry has created a new process of magnetic treatment to eliminate tool stress. It places the ferromagnetic tool in a high-intensity pulsed magnetic field, changing the direction of the magnetic field several times per second, using magnetostriction to cause internal vibrations within the tool material, resulting in stress relief or residual stress distribution. Experiments show that the magnetization process has a wide range of applicability, it can high-speed steel, high-quality cobalt alloy steel, carbide and other tools and titanium nitride, titanium carbide and other coated tools to eliminate stress magnetization treatment, to improve tool life The effect is remarkable. The following table is passed