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LOW-YIELD-RATIO ULTRA-HIGH-STRENGTH HIGH-TOUGHNESS STEEL FOR PRESSURE HULLS AND PREPARATION METHOD THEREFOR

机译：低产量比超高强度高韧性钢用于压力壳和制备方法

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摘要

The present invention discloses a low-yield-ratio ultra-high-strength high-toughness steel for pressure hulls and a preparation method therefor, wherein the chemical components by weight percentage are: 0.05%-0.10% of C, 0.15%-0.35% of Si, 0.60%-1.00% of Mn, 0.10%-0.50% of Cu, 0.10%-1.00% of Mo, 0.40%-0.70% of Cr, 0.05%-0.15% of V, 5.00%-10.00% of Ni, and the balance of Fe and unavoidable impurities. The technical solution of the present invention adopts secondary quenching heat treatment, the first quenching is performed to achieve complete austenitizing, and then the second quenching and tempering are performed to finally obtain complex phase structures such as tempered martensite, critical ferrite and retained austenite, so as to meet the performance index requirements of low yield ratio, ultra-high strength and high toughness, and thereby promoting application in practice.

机译：本发明公开了一种用于压力壳的低产量比超高强度高韧性钢及其制备方法，其中通过重量率的化学成分为：0.05％-0.10％C，0.15％-0.35％ Si，0.60％-1.00％的Mn，0.10％-0.50％的Cu，0.10％-1.00％的Mo，0.40％-0.70％Cr，v，5.00％-10.15％，5.00％-10.00％的Ni ，以及Fe和不可避免的杂质的平衡。本发明的技术方案采用二次淬火热处理，进行第一淬火以实现完全奥氏体化，然后进行第二淬火和回火，最终获得复杂的相结构，例如回火马氏体，临界铁氧体和保留的奥氏体，所以至于满足低屈服比，超高强度和高韧性的性能指标要求，从而促进实践中的应用。

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公开/公告号US2022002849A1

专利类型
公开/公告日2022-01-06

原文格式PDF
申请/专利权人 NORTHEASTERN UNIVERSITY;
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申请/专利号US202017130785
发明设计人 QIBIN YE;LIYE KAN;CHENG ZHOU;QINGHAI WANG;YIMIN WANG;YONG TIAN;ZHAODONG WANG;
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申请日2020-12-22
分类号C22C38/46;C22C38/42;C22C38/44;C22C38/02;C22C38/04;C21D8/02;C21D8;C21D9/46;
国家 US
入库时间 2022-08-24 23:15:15

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