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发明公开
CN105039862A Co-free复合强化二次硬化超高强度钢及制备方法 有权

Co-free复合强化二次硬化超高强度钢及制备方法
摘要：
一种Co-free复合强化二次硬化超高强度钢及制备方法，属于合金钢技术领域.化学成分重量百分数为：C 0.20-0.50％，Cr 1.0-5.0％，Ni 10.00-30.0％，Al 0.50-3.0％，Mo 1.0-5.0％，W≤2.0％,V≤0.30％,Nb≤0.20％，余量为Fe和不可避免的杂质。该合金可采用真空感应+真空自耗重熔或真空感应+电渣重熔冶炼工艺。优点在于，与现有技术相比综合性能良好，具有超高强度和良好塑韧性，热处理工艺性能优良，具有较高的回火稳定性和抗过时效能力，节约了战略资源Co元素含量，提高了经济性。
摘要（英）：

The invention discloses Co-free composite reinforced secondary hardening ultrahigh-strength steel and a preparing method and belongs to the technical field of alloy steel. The Co-free composite reinforced secondary hardening ultrahigh-strength steel comprises, by weight, 0.20-0.50% of C, 1.0-5.0% of Cr, 10.0-30.0% of Ni, 0.50-3.0% of Al, 1.0-5.0% of Mo, 2.0% of W or less, 0.30% of V or less, 0.20% of Nb or less, and the balance Fe and unavoidable impurities. The vacuum induction technology, the vacuum arc remelting or vacuum induction technology and the electroslag remelting technology can be adopted in the alloy. Compared with the prior art, the Co-free composite reinforced secondary hardening ultrahigh-strength steel has the beneficial effects that the comprehensive performance is good, ultrahigh strength and good ductility and toughness are achieved, the heat treatment technology is superior in performance, high temper resistance and overaging resisting capability are achieved, the content of the strategic resource of the Co element is saved, and the economical efficiency is improved.

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