| 摘要 |
PROBLEM TO BE SOLVED: To provide a shaft material for a torque sensor with its hysteresis reduced close to zero, and a torque sensor using the same. SOLUTION: This shaft material for a torque sensor contains 0.30 to 1.50% C, 0.1 to 4.0% Si, 0.1 to 4.0% Mn, more than 5.0-20.0% Cr, each mass%, and the balance substantially Fe. Its structure is mainly composed of ferromagnetic martensite, the amount of nonmagnetic residual austenite contained in the structure is 5.0 to 40.0%, and its residual magnetic flux density Br is 0.6 T(teslas) or less.
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