摘要
研究评价了9Cr-3W-3Co耐热铸钢在630~650℃超超临界火力发电机组高温关键部件的应用可行性。通过真空感应熔炼制备了40 kg钢锭试验件,采用均质化+正火+回火的热处理工艺,系统分析了9Cr-3W-3Co钢在热处理过程中的组织演变及析出相变化,测试了铸件的常温和高温力学性能,特别是650℃高温持久性能。
The application feasibility of 9 Cr-3W-3 Co heat-resistant cast steel in the high temperature key components of the ultra-supercritical thermal power generator set at 630~650℃has been studied and evaluated.40 kg ingot test piece has been prepared by vacuum induction melting.The microstructure evolution and precipitation phase change of 9 Cr-3W-3 Co steel during heat treatment have been systematically analyzed by means of homogenization+normalizing+tempering process.The mechanical properties of the castings at room temperature and high temperature,especially the high temperature creep-rupture properties at 650℃have been tested.
作者
张留军
宋肖阳
李康
常军委
王彩山
吉晓霞
朱琳
Zhang Liujun;Song Xiaoyang;Li Kang;Chang Junwei;Wang Caishan;Ji Xiaoxia;Zhu Lin
出处
《大型铸锻件》
2019年第4期29-31,34,共4页
Heavy Casting and Forging
关键词
耐热钢
铸件
微观组织
持久强度
冲击韧性
heat resistant steel
casting
microstructure
creep strength
impact toughness
