STRESS SENSOR

摘要

A stress sensor which is bonded to an article and generates a Barkhausen signal, of which the dependence on temperature is lowered. The stress sensor is made of a steel material having a structure in which a granular carbide consisting of an element M (at least one kind of element selected from the group consisting of Fe, Al, B, Co, Cr, Mn, Mo, Nb, Ni, Si, Sn, Ti, U, V, W and Zr) and C is precipitated in ferrite crystals. Preferably, the mean particle size of the granular carbide precipitated in the structure is from 0.05 to 1.0 mu mg and the standard deviation of the grain size distribution of the granular carbide is from 0.14 to 2.0 mu m. Preferably, the mean grain size of the granular carbide is from 1.0 to 3.0 mu m and further preferably, the carbide is an M3C compound.