Super304H钢700 ℃时效后组织和韧性的变化
Microstructure and Toughness Changes of Super304H Steel Aged at 700 ℃
摘 要
利用光学显微镜、扫描电子显微镜、X射线衍射仪和冲击试验机等研究了Super304H钢在700 ℃时效过程中的组织和韧性变化。结果表明: Super304H钢在时效过程中析出了M23C6碳化物, 其析出量在时效初期快速增加, 一定时间后析出量趋于稳定, M23C6主要在晶界上呈链状分布, 随时间延长尺寸很快长大; M23C6的沿晶析出引起了Super304H钢的时效脆化, 且M23C6析出量越多钢的时效脆化程度越大。
Super304H钢
时效脆化
组织
韧性
ultra supercritical
Super304H steel
aging brittleness
microstructure
toughness
Abstract
Microstructure and toughness changes of Super304H steel aged at 700℃ was investigated using optical microscopy, scanning electron microscopy, X-ray diffraction and impact tester. Results show that M23C6 carbide was precipitated during aging treatment. The amount of M23C6 was increased rapidly at the initial stage and then became stable. M23C6 was precipitated along grain boundary in a chain-like manner, and with the increase of time its size increased rapidly. Aging brittleness of Super304H steel was attributed to the precipitation of M23C6 along grain boundary, and the brittleness tended to be severe for the steel containing higher amount of M23C6.
中图分类号 TG142.1
所属栏目 试验研究
基金项目 山东电力集团公司重点科技项目(2007A-47)
收稿日期 2011/9/26
修改稿日期 2012/7/12
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,DU Bao-shuai,ZOU Yong,WEI Yu-zhong. Microstructure and Toughness Changes of Super304H Steel Aged at 700 ℃[J]. Materials for mechancial engineering, 2012, 36(10): 12～14
张忠文,李新梅,杜宝帅,邹勇,魏玉忠. Super304H钢700 ℃时效后组织和韧性的变化[J]. 机械工程材料, 2012, 36(10): 12～14
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)
【2】李文胜,黄 翔,王 伟,胡 平,张春雷,高 岩, "Super304H奥氏体不锈钢高温下组织与性能演变的研究进展",机械工程材料 40, 1-5(2016)
【3】刘婉颖,朱毅科,施太和,时宇,邵登全,李慧莹, "V-150钻杆钢的示波冲击韧性及动态断裂韧性",机械工程材料 39, 87-90(2015)
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参考文献
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【5】杨岩, 程世长, 杨钢.Super304H锅炉用钢的开发和研究现状[J].特殊钢, 2002, 23(1): 27-30.
【6】刘正东, 程世长, 包汉生, 等.超超临界火电机组用锅炉钢技术国产化问题[J].钢铁, 2009, 44(6): 1-7.
【7】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.
【8】于鸿垚, 迟成宇, 董建新, 等.650 ℃长期时效过程中Super304H耐热不锈钢组织的演变[J].北京科技大学学报, 2010, 32(7): 877-881.
【9】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.
【10】肖纪美.不锈钢的金属学问题[M].北京: 冶金工业出版社, 2006.
【11】张忠文, 李新梅, 杜宝帅, 等.时效温度对Super304H钢焊缝金属组织和韧性影响[J].焊接学报, 2011(7): 43-46.
【12】李新梅, 邹勇, 张忠文, 等.Super304H钢焊接接头时效脆化机理[J].焊接学报, 2011(2): 1-6.
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