NONMAGNETIC STAINLESS STEEL, MEMBER FOR RADIO-CONTROLLED TIMEPIECE, PRODUCTION PROCESS OF NONMAGNETIC STAINLESS STEEL, AND RADIO WAVE RECEIVER

摘要

[Problems to be solved] Provided are a nonmagnetic stainless steel which has a higher electrical resistivity than existing nonmagnetic alloys, a production process for producing the stainless steel, and a radio wave receiver. [Solution] The main case (10) and the rear cover (20) are constituted of a nonmagnetic stainless steel having an electrical resistivity as high as more than 100 µ©€¢cm and consisting of C: not more than 0.1%, Si: 4.0-7.5%, Mn: not more than 2.0%, Ni: 25.5-30.0%, Cr: 15.0-20.0%, Mo: 0.1-3.0%, Cu: 0-2.0%, in mass% and the balance Fe and impurities. Even if some of the variable magnetic flux generated by the coil of an antenna (11) runs through the main case (10) and the rear cover (20), the receiving efficiency of the antenna can be prevented from being reduced by eddy current loss and a sufficient radio receiving sensitivity can be obtained. This nonmagnetic stainless steel is produced through the steps of hot and/or cold plastic working and a subsequent solution treatment conducted at 1,000-1,180°C.