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A method for the production of a band or a from a cold rolled strip of martensite hardening steel cut-out workpiece
A method for the production of a band or a from a cold rolled strip of martensite hardening steel cut-out workpiece
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机译：用马氏体淬火钢切出的冷轧带材生产带材或带材的方法
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摘要
The invention concerns a method for making a strip or a workpiece cut out from a cold rolled maraging steel strip and hardened by a hardening heat treatment, which consists, prior to the heat treatment, in subjecting the strip or the workpiece to cold plastic deformation with a rate of strain hardening more than 30 % and in subjecting the strip or the workpiece to a recrystallization annealing so as to obtain a fine grain of ASTM index more than 8. The maraging steel composition comprises, by weight: 12 % ≤ Ni ≤ 24.5 %; 2.5 % ≤ Mo ≤ 12 %; 4.17 % ≤ Co ≤ 20 %; Al ≤ 0.15 %; Ti ≤ 0.1 %; N ≤ 0.003 %; Si ≤ 0.1 %; Mn ≤ 0.1 %; C ≤ 0.005 %; S ≤ 0.001 %; P ≤ 0.005 %; H ≤ = 0.0003 %; O ≤ 0.001 %; the rest being iron and impurities resulting from preparation of the composition, the composition further satisfying the following relationships: 20 % ≤ Ni + Mo ≤ 27 %; 50 ≤ Co x Mo ≤ 200; Ti x N ≤ 2 x 10-4. The invention also concerns the resulting strip.
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机译：本发明涉及一种用于制造从冷轧马氏体时效钢带上切下并通过硬化热处理进行硬化的带材或工件的方法，该方法包括在热处理之前，使带材或工件经受冷塑性变形，使其变形。应变硬化率大于30％，并对带材或工件进行再结晶退火，以获得ASTM指数大于8的细晶粒。马氏体时效钢成分的重量百分比为：12％≤Ni≤24.5 ％; 2.5％≤Mo≤12％; 4.17％≤Co≤20％; Al≤0.15％; Ti≤0.1％; N≤0.003％; Si≤0.1％; Mn≤0.1％; C≤0.005％; S≤0.001％; P≤0.005％; H≤= 0.003％; O≤0.001％;其余为铁和由制备该组合物产生的杂质，该组合物进一步满足以下关系：20％≤Ni+Mo≤27％; 50≤Co x Mo≤200 <; Ti x N≤2 x 10-4。本发明还涉及所得的条带。
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