| abstract |
PROBLEM TO BE SOLVED: To provide a rotary compressor which has excellent wear resistance and can be used for R134a refrigerant, R22 refrigerant, and R22 substitute refrigerant. SOLUTION: A vane 1 is inserted into a groove formed in a radial direction of a cylinder, slides on an outer peripheral surface of a roller, and retreats to partition the inside of the cylinder into a suction portion side and a discharge portion side. 5 is obtained by molding and sintering a quench-hardenable iron-based powder material containing 9% to 27% of Cr and 0.4% or more of C The base B1 of the base material is formed into a martensite structure by quenching and tempering, using a sintered iron having a 9 ratio of 15% or less as a base material. The configuration is formed. Cr amount 9 %, The wear resistance of the Fe—N layer 20 and the nitrogen diffusion layer 21 is improved, and the porosity is reduced to 15% or less, the dimensional distortion is reduced, and the strength is reduced by nitriding. And embrittlement is also reduced. |