Method for manufacturing a magnetostrictive shaft

Details Method for manufacturing a magnetostrictive shaft Method for manufacturing a magnetostrictive shaft

1996-08-13

1998-04-21

Williams, Hezron E.

Measuring and testing

Dynamometers

Responsive to torque

148122, 324209, 73862333, G01L 300

Patent

active

057419825

ABSTRACT:
A structure of a magnetostrictive shaft applicable to a magnetostriction-type torque sensor and a method for manufacturing the same can achieve a high torque sensitivity. A shaft parent material is made of a non-magnetic austenitic series metallic material (YHD50) and a magnetic thin film is made of a magnetostriction material such as Iron-Aluminium series alloy plasma spray coated on the whole outer peripheral surface of the shaft parent material. In a second embodiment, a mechanical working is carried out for the shaft material on the surface of which the magnetostriction material thin film is coated, the worked shaft material is heated under an inert gas atmosphere, and the heated shaft material is immersed into oil under the inert gas atmosphere to perform the oil quenching.

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