| 摘要 |
PROBLEM TO BE SOLVED: To provide a control valve and a variable displacement-type compressor therewith, capable of simplifying rust-proof treatment and reducing the cost by dispensing with the masking in the rust-proofing of a yoke. SOLUTION: A storage part 49 made of a SUS material is mounted on the yoke 48 by brazing in advance. The yoke 48 is dipped in a blackening solution of a bath temperature of 140 deg.C for 20 minutes, and dried. The blackening solution is an alkaline solution prepared by mixing an oxidant into a concentrated caustic soda solution, and a solution of a composition free from blackening reaction is used as the SUS material. The yoke 48 excluding the storage part 49 is provided with a film of Fe3O4 (iron tetroxide), which dispenses with the masking of the storage part 49. Whereby a masking tool becomes unnecessary, the rust-proofing can be simplified and the cost can be reduced. |
