Influence of heat treatment on the residual magnetization of steel in partial magnetic hysteresis

Аннотация

A formula is derived for the residual magnetization M_r of steel after repeated magnetic hysteresis, on the basis of measurements of the saturation magnetization M_s, the coercive force H_cs, the residual magnetization M_rs for the limiting hysteresis loop, and the maximum magnetizing field strength H_m of the partial hysteresis loop. The influence of variation in the tempering temperature t_te of steel on M_r at different H_m is analyzed. The dependence M_r(t_te) is established for small and large H_m. It is established that the M_r results may effectively be used for nondestructive assessment of the tempering of moderate-carbon alloy steel.