| 摘要 |
PROBLEM TO BE SOLVED: To produce a maraging steel contg. no cobalt and titanium and suitable for producing watch parts and bands. SOLUTION: This steel contains, by weight, 14 to 23% Ni, 4 to 13% Mo, 1 to 3.5% Al, <=0.01% C, and the balance iron with impurities caused by refining, and satisfies the inequality of 23<=Ni+Mo<=27% and Ni+2.5×Mo+2.3×Al>=38%. It is preferable that the yield stress Re in an aging state after hot baking to >=800 deg.C or after cold working is regulated to >=1900 MPa, the elongation percentage is regulated to >=4%, and the cold working ratio is regulated to 0%-30%.
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