研制出一种R≥1900 MPa的铬-镍-钴-钼系大规格棒材((φ)200 mm)超高强度马氏体时效不锈钢,通过研究热处理工艺对八种不同成分的铬-镍-钴-钼系马氏体时效不锈钢力学性能的影响,进一步优化了合金成分.结果表明:优化成分后得到一种高强(Rm=1940 MPa)、高韧(AKU2=55J,KIC=104 MPa·(√)m)的马氏体时效不锈钢.
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