摘要
MGH956合金是采用独特的机械合金化工艺,将在超高温下可保持稳定的纳米级Y2O3颗粒均匀分散于基体中,以充分实现弥散强化的一种铁基高温合金。相比其他同类合金,MGH956合金具有高熔点、低比重、低线膨胀系数,突出的抗高温氧化和腐蚀、优异的高温持久强度,良好的热疲劳等性能。针对粗晶组织存在韧脆转变的现象,着重开展了细晶板材的研究。就MGH956合金粗晶组织、细晶组织以及与其他同类合金的性能进行了对比,并展望了合金的应用前景。
MGH956 alloy is an iron-based high temperature alloy using a unique technology of mechanical alloying that ultra high temperature stability of nanometer Y2O3 particles were dispersed in matrix to achieve dispersion strengthened. Compared to other similar alloys, MGH956 alloys possess high melting point, low density, low coefficient of linear thermal expansion, outstanding resistance to high temperature oxidation and corrosion, excellent high temperature creep rupture strength, good thermal fatigue properties. Concerning ductile-brittle transition phenomenon of coarse structure, fine-grain sheet was studied specially. In this article, properties of coarse grain structure and fine grain structure of MGH956 alloy and other similar alloys were compared, the application prospect of the alloy was also discussed.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2011年第S2期533-536,共4页
Journal of Iron and Steel Research
关键词
MGH956合金
氧化物弥散强化
细晶组织
韧脆转变
应用前景
MGH956 alloy
oxide dispersion strengthened(ODS)
fine-grained structure
dutile-brittle transition temperature(DBTT)
application prospect
