摘要
在对国产大口径P92耐热钢管进行650℃时效处理后,研究了其显微组织、拉伸性能和蠕变性能,并与进口P92钢进行了对比。结果表明:国产P92钢在化学成分、显微组织、拉伸性能以及蠕变特性等方面均符合ASTM A335、GB 5310-2008和EN10216等相关标准的要求;与进口P92钢相比,国产P92钢在时效过程微观结构并未发现明显异常,只是Laves相的粗化速度相对较快,这是国产P92耐热钢蠕变性能低于国外P92钢的原因之一。
A domestic P92 heat-resistant pipe with large diameter was aged at 650℃, and then its microstructure, tensile properties and creep properties were analyzed and compared with imported P92 steel. The results indicate that the domestic P92 steel met the requirements of ASTM A335, GB5310-2008 and EN10216 in terms of chemical composition, microstructure, mechanical properties and creep rupture properties. Compared with imported P92 steel, the domestic P92 steel did not change a lot in terms of microstructure during aging at 650 ℃, but had a faster coarsening rate of Laves phase, which was one of the main reasons why the creep streng＇th of domestic P92 steel was lower than that of imported steel.
出处
《机械工程材料》
CAS
CSCD
北大核心
2014年第1期68-73,共6页
Materials For Mechanical Engineering
关键词
超超临界机组
P92耐热钢
拉伸性能
蠕变性能
显微组织
ultra supercritical （USC） unit
P92 heat-resistant steel
tensile property
creep property
mi-crostrueture
