650 ℃时效不同时间后Super304H钢的显微组织
Microstructure of Super304H Steel after Aging at 650 ℃ for Different Times
摘 要
利用光学显微镜、扫描电子显微镜、X射线衍射仪和透射电镜等研究了Super304H钢在650 ℃时效不同时间后的显微组织。结果表明: 500 h内时效后Super304H钢的组织均为奥氏体和析出相, 析出相主要由Nb(C,N)、富铜相和M23C6组成, 而供货态没有M23C6; 在时效初期析出相的析出速率相对较快, 300 h后趋于稳定; 随时效时间延长细小颗粒状Nb(C,N)和富铜相没有明显长大, M23C6的形态由细条状逐渐向链状、块状转变。
Super304H钢
时效组织
析出相
ultra supercritical unit
Super304H steel
aging microstructure
precipitate phase
Abstract
The microstructure of Super304H steel after aging at 650 ℃ for different times was investigated by means of optical microscopy, scanning electron microscopy, X-ray diffractometer and transmission electron microscopy. The results show that the microstructure of Super304H steel after aging for 500 h consisted of austenite phase and precipitate phase, which included Nb(C,N), M23C6 and Cu-rich phase. However, M23C6 was not found in the as-received Super304H steel. The precipitate rate of precipitate phase was relatively fast at the initial stage and became stable after 300 h. With increase of aging time, fine Nb(C,N) particles and Cu-rich phase had not grow obviously. The morphology of M23C6 changed from fine lath-like to chain-like and bulk.
中图分类号 TG142.1
所属栏目
基金项目 山东电力集团公司重点科技项目(2007A-47)
收稿日期 2010/11/16
修改稿日期 2011/3/2
网络出版日期
作者单位点击查看
备注张忠文(1962-), 男, 山东烟台人, 高级工程师, 硕士。
引用该论文: ZHANG Zhong-wen,LI Xin-mei,ZOU Yong,DU Bao-shuai. Microstructure of Super304H Steel after Aging at 650 ℃ for Different Times[J]. Materials for mechancial engineering, 2011, 35(11): 5～8
张忠文,李新梅,邹勇,杜宝帅. 650 ℃时效不同时间后Super304H钢的显微组织[J]. 机械工程材料, 2011, 35(11): 5～8
被引情况:
【1】唐波,朱丽慧, "高温和应力作用下国产S30432钢中Z相的析出行为",机械工程材料 39, 19-22(2015)
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参考文献
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【3】SAWARAGI Y, OTSUKA N, SENBA H,et al. Properties of a new 18-8 austenitic steel tube (SUPER 304H) for fossil fired boilers after service exposure with high elevated temperature strength[J]. Sumitomo Search, 1994, 56: 34-43.
【4】杨岩, 程世长, 杨钢.铜含量对Super304H钢持久性能的影响[J].机械工程材料, 2002, 26(10): 23-25.
【5】李新梅, 邹勇, 张忠文, 等.Super304H奥氏体耐热钢微观组织研究[J].材料科学与工艺, 2010, 18(2): 281-286.
【6】李新梅, 邹勇, 张忠文, 等.时效温度对Super304H钢析出相的影响[J].材料热处理学报, 2009, 30(6): 51-56.
【7】李新梅, 邹勇, 张忠文, 等.新型耐热钢Super304H高温时效后的组织与性能[J].材料工程, 2009(5): 38-42.
【8】肖纪美.不锈钢的金属学问题[M].北京: 冶金工业出版社, 2006.
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