Proportional solenoid, method of manufacturing the same, and method of controlling characteristics of proportional solenoid

摘要

The proportional solenoid (100) of the present invention exists at a position separated from the first magnetic region (12a) mainly composed of a ferrite structure and the adsorption surface (11b) and includes a ferrite structure, a martensite structure, and an austenite structure. (1) A tubular member in which a semi-magnetic region (14a) and a non-magnetic region (13), which is located at a position further away from the adsorption surface than the semi-magnetic region and is mainly composed of an austenitic structure, are formed continuously and integrally. (101).