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以前,钢材表面淬火深度是在热处理后切断试样进行化学分析和硬度试验来进行测定的。下面介绍的是一种无损测定淬火深度的装置,其淬火深度的测定是着眼于淬火硬度及随硬度不同而产生的材料磁特性的变化,通过测定与晶格变形有关的各种磁量中顽磁力(与残磁之比)的变化,再由小型电子计算机运算处理来确定表面碎火深度的。通常,表面碎火处理过的钢材试样的硬化层与硬度的关系如图1所示,而且众所周
In the past, the surface quenching depth of steel was determined by cutting the sample after heat treatment for chemical analysis and hardness test. Described below is a non-destructive determination of the quenching depth of the device, the determination of the quenching depth is focused on the quenching hardness and hardness with different materials resulting from the magnetic properties of changes by measuring the lattice distortion associated with a variety of magnetic stubborn Magnetic (with residual magnetic ratio) changes, and then by a small computer computing to determine the depth of surface crushing fire. In general, the relationship between the hardened layer and the hardness of the surface-cracked steel sample is shown in FIG. 1,