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。
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 M23 C6 carbide was precipitated during aging treatment. The amount of M23 C4 was increased rapidly at the initial stage and then became stable. M23C4 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 M23 C6 along grain boundary, and the brittleness tended to be severe for the steel containing higher amount of M23C6.
参考文献
| [1] | 周荣灿,范长信.超超临界火电机组材料研究及选材分析[J].中国电力,2005(08):41-47. |
| [2] | 杨岩,程世长,杨钢.Super304H锅炉钢的开发和研究现状[J].特殊钢,2002(01):27-29. |
| [3] | 刘正东,程世长,包汉生,杨钢,干勇.超超临界火电机组用锅炉钢技术国产化问题[J].钢铁,2009(06):1-7. |
| [4] | 李新梅,邹勇,张忠文,邹增大.时效温度对Super304H钢析出相的影响[J].材料热处理学报,2009(06):51-56. |
| [5] | 于鸿垚,迟成宇,董建新,谢锡善,崔正强,陈孝方.650℃长期时效过程中Super 304H耐热不锈钢组织的演变[J].北京科技大学学报,2010(07):877-882. |
| [6] | 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(10):23-25. |
| [7] | 张忠文,李新梅,杜宝帅,邹勇,魏玉忠.时效温度对Super 304H钢焊缝金属组织和韧性影响[J].焊接学报,2011(07):43-46,78. |
| [8] | 李新梅,邹勇,邹增大,张忠文.SuPer304H钢焊接接头时效脆化机理[J].焊接学报,2011(02):1-4,24. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%