JP2006501368A5 - - Google Patents

Claims (13)

A high alloy ferritic steel alloy, the alloy, 1.00% silicon, 18.0 to 22.0 wt% chromium, 1.80 to 2.50 wt% molybdenum, 0.01 High alloy ferritic steel alloy consisting of ~ 0.10 wt% nitrogen, 0.01 wt% or less titanium, 0.01 wt% or less niobium, 0.01 wt% or less aluminum, the balance being substantially iron . The alloy, 0.005 wt% or less of titanium, 0.005 wt% or less of aluminum, 0.005 wt% or less of niobium, 1.00 wt% manganese, 0.04 wt% or less of phosphorus, The high alloy ferritic steel alloy according to claim 1 containing 0.025 wt% or less carbon. The alloy according to claim 1 or 2, comprising 19.5 to 20.5 wt% chromium, 1.90 to 2.10 wt% molybdenum, 0.05 to 0.10 wt% nitrogen, based on the alloy . High alloy ferritic steel alloy. The alloy, about 0.8% silicon, about 20 wt% chromium, about 2 wt% molybdenum, about 0.05 wt% of nitrogen, claim containing 0.002 wt% or less of titanium The high alloy ferritic steel alloy according to any one of 1 to 3. The high alloy ferritic steel alloy according to any one of claims 1 to 4, comprising 0.10 wt% or less of nickel with respect to the alloy. The high alloy ferritic steel alloy according to any one of claims 1 to 5, containing 0.03% by weight or less of sulfur with respect to the alloy. The high alloy ferritic steel alloy according to claim 6 containing 0.015 to 0.03% by weight or less of sulfur with respect to the alloy.   A casing part for a wristwatch comprising the steel alloy according to any one of claims 1 to 7.   The casing component according to claim 8, which is a casing bottom or a casing shell.   A dial for a wristwatch made of the steel alloy according to any one of claims 1 to 7. A connected watchband component comprising the steel alloy according to any one of claims 1 to 7.   A magnetic shielding material for a wristwatch comprising the steel alloy according to any one of claims 1 to 7. A steel alloy powder according to any one of claims 1 to 7, but optionally suspended with a liquid binder, a steel alloy powder containing a low concentration of nitrogen,
The suspension is poured into a mold corresponding to the casing part,
Evaporate the binder ,
The powdery residue Tomebutsu remaining in the mold characterized by sintering,
However, when the powdery alloy contains low concentrations of nitrogen, the sintering is carried out under an atmosphere containing nitrogen, a method of manufacturing the casing parts for watches.