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COMPOSITION OF MARTENSITE STAINLESS STEEL, PROCEDURE FOR FABRICATION OF MECHANICAL TOOL OUT OF THIS STEEL AND PART FABRICATED BY THIS PROCEDURE
COMPOSITION OF MARTENSITE STAINLESS STEEL, PROCEDURE FOR FABRICATION OF MECHANICAL TOOL OUT OF THIS STEEL AND PART FABRICATED BY THIS PROCEDURE
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机译:马氏体不锈钢的组成,从该钢中制造机械工具的程序以及由该程序制造的零件
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FIELD: metallurgy.;SUBSTANCE: there is cast ingot made out of steel containing wt %: 9≤Cr≤13, 1.5≤Mo≤3, 8≤Ni≤14, 1≤Al≤2, 0.5≤Ti≤1,5 at Al+Ti≥2.25, traces of ≤Co≤2, traces of ≤W≤1 at Mo+(W/2)≤3, traces of ≤P≤0.02, traces of ≤S≤0.0050, traces of ≤N≤0.0060, traces of ≤C≤0.025, traces of ≤Cu≤0.5, traces of ≤Mn≤3, traces of ≤Si≤0.25, traces of ≤O≤0.0050, iron and impurities - the rest. The ingot is heat treated and there is produced a semi-finished product heat treated for solid solution at temperature from 850 to 950°C subjected further to fast cryogen treatment at temperature not exceeding - 75°C without an interval below temperature of transformation of Ms and during time sufficient for complete cooling through whole thickness of the part. The part is tempered-aged at temperature from 450 to 600°C and duration of isothermal conditioning from 4 to 32 hours.;EFFECT: steel possesses high corrosion resistance at high mechanical strength.;26 cl, 2 tbl
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