摘要
研究了均匀化处理对两种含B的铸造TiAl合金铸造组织的影响。研究发现1 370℃/5 min/OQ+1150℃/6 h/AC均匀化热处理能有效消除B2相,将b稳定化元素固溶到基体中,实现成分均匀化;1 370℃/5 min/OQ+1 150℃/24 h/AC均匀化热处理后可使粗大的铸造片层组织分解转变为细晶近g组织,平均晶粒直径50mm。
The effect of homogenizing treatment on the microstructures of two cast TiAl alloy with B addition was investigated.It is found that homogenizing treatment at 1 370℃/5min/OQ and 1 150℃/6 h/AC can efficiently promote the elimination of B2 phase segregation,and the solution of bstabilizing elements to the matrix results in composition homogenization.The coarse as-cast lamellar microstructures can be decomposed completely and transformed into fine nearg microstructures through the above homogenizing treatment.The average grain size of fully lamellar microstructures is about 50mm.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2010年第3期63-66,82,共5页
Aerospace Materials & Technology
