苏祖武
,
孟国文
,
郭鸿镇
,
刘建超
,
姚泽坤
,
杨昭苏
,
胡宗式
金属学报
本文对TC11钛合金棒材显微组织不均匀缺陷产生原因及消除途径进行了研究。结果表明,由于铸锭最初锻造温度在β相区,随后两相区锻造变形量不大且分布不均匀,致使部分晶界α和二次α聚集并粗化呈块状,或沿主变形方向拉长呈条状,或遗留下原晶界α。若采用(α+β)中间形变热处理+β处理、水冷+再结晶退火、空冷的工艺,可完全消除晶界α,拉长α和块状α相,获得均匀细小等轴α组织,初生等轴α相的平均直径可细化至1.9μm。
关键词:
TC11钛合金
,
forging
,
microstructure
,
equiaxed grain refinement
SU Zuwu MENG Guowen GUO Hongzhen LIU Jianchao YAO Zekun Northwestern Polytechnical University
,
Xi'an
,
ChinaYANG Zhaosu HU Zongshi Baoji Non-Ferrous Metals Mill
,
Baoji
,
China
金属学报(英文版)
The formation reason and elimination method of non-uniform microstructure defects in Ti al- loy TC11 bar have been studied.The coagulating and coarsening into block of the part of grain boundary α and secondary α seem to be caused by the ingot cogging and initial forging temperature in the β region as well as no more enough deformation and uneven distribution. The grain α,elongated α and blocky α may be finally eliminated by adopting the technique of (α+β)thermomechanical processing+β processing,W.Q.+recrystallization annealing,A.C., thus the size of uniform and fine equiaxed α structure is believed to be reduced to 1.9258μm.
关键词:
TC11 Ti alloy
,
null
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null
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