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发明授权
CN106048448B 一种含Al高模量低温回火合金钢及制备方法 有权

一种含Al高模量低温回火合金钢及制备方法
摘要：
一种含Al高模量低温回火超高强度钢及制备方法，属于合金钢技术领域。该钢的化学组成成分重量％为：C 0.33‑0.43％，Cr 0.50‑3.5％，Ni 1.0‑6.0％，Si 0‑2.0％，Mn 0‑2.0％，Mo 0‑2.0％，Al 0‑2.0％，Co 0‑6.0％，V 0‑0.3％，Nb≤0.2％，其余为Fe及其他不可避免的杂质元素。本发明与现有技术相比综合性能优良，具有σb≥1900Mpa和KIC≥90MPam1/2的高韧性和超高强度的优点，具有500℃时σb≥1400Mpa高温强度和E≥200GPa高模量。
摘要（英）：

The invention provides high-modulus low-temperature-tempered Al-containing ultrahigh-strength steel and a preparation method and belongs to the technical field of alloy steel. The steel comprises, by weight, 0.33%-0.43% of C, 0.50%-3.5% of Cr, 1.0%-6.0% of Ni, 0-2.0% of Si, 0-2.0% of Mn, 0-2.0% of Mo, 0-2.0% of Al, 0-6.0% of Co, 0-0.3% of V, 0-0.2% of Nb and the balance Fe and other inevitable impurity elements. Compared with the prior art, the high-modulus low-temperature-tempered Al-containing ultrahigh-strength steel has the advantages that the comprehensive performance is excellent, the high tenacity sigma b is 1900 MPa or over, and the ultrahigh strength K is 90 MPam<1/2> or over, and has the high-temperature strength sigma b of 1400 MPa or over and the high modulus E of 200 GPa or over at the temperature of 500 DEG C.

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