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熱氫處理對TC21鈦合金鑄態(tài)組織的影響
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更新時間：2015-08-27
針對α+β型TC21高強韌鈦合金熱加工抗力大等問題，采用熱氫處理技術(shù)，對鑄態(tài)試樣進行0.1%~0.5%(質(zhì)量分數(shù)) 5種不同氫含量的置氫處理和真空退火除氫處理。研究熱氫處理過程中TC21鈦合金組織結(jié)構(gòu)和晶粒度變化特征，揭示熱氫處理對鈦合金組織演變的影響規(guī)律，探討鈦合金熱氫處理組織細化機制。
熱氫處理對TC21鈦合金鑄態(tài)組織的影響Effect of thermo-hydrogenation treatment on microstructure
of cast TC21 alloy
針對α+β型TC21高強韌鈦合金熱加工抗力大等問題，采用熱氫處理技術(shù)，對鑄態(tài)試樣進行0.1%~0.5%(質(zhì)量分數(shù))
5種不同氫含量的置氫處理和真空退火除氫處理。研究熱氫處理過程中TC21鈦合金組織結(jié)構(gòu)和晶粒度變化特征，揭示熱氫處理對鈦合金組織演變的影響規(guī)律，探討鈦合金熱氫處理組織細化機制。結(jié)果表明，熱氫處理可以顯著細化晶粒，降低TC21鑄態(tài)組織的變形抗力。
Aiming at the problems such as large deformation
resistance during hot working of high strength and high toughness (α+β)-type
titanium alloy TC21, all specimens were handled by thermo-hydrogenation
treatment technology, such as being hydrogenated respectively in five different
hydrogen contents from 0.1%~0.5% (mass fraction), and dehydrogenated by vacuum
annealing. The microstructure evolution of TC21 alloys with hydrogenation and
dehydrogenation was studied. The effects of thermo-hydrogenation treatment on
the microstructure，grain size, and variation regularity of TC21 were
investigated. The mechanism of microstructure refinement during thermo-
hydrogenation treatment was also discussed. The results show that
thermo-hydrogenation treatment can refine the microstructure and reduce the
deformation resistance largely.
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