热加工工艺
熱加工工藝
열가공공예
HOT WORKING TECHNOLOGY
2010年
5期
4-7
,共4页
项宏福%李惠%王冀恒%崔玉友
項宏福%李惠%王冀恆%崔玉友
항굉복%리혜%왕기항%최옥우
蠕变抗力%最小蠕变速率%蠕变方程
蠕變抗力%最小蠕變速率%蠕變方程
연변항력%최소연변속솔%연변방정
creep resistance%minimum creep rate%creep equation
研究了名义成分为Ti-46Al-2Cr-2Nb-0.15B合金在700～850℃.140～300MPa的蠕变条件下的蠕变性能和蠕变机制.研究表明,在蠕变过程中随着温度和载荷的增加,合金的最小蠕变速率随之增大;TiAl基合金在700～850℃,140～300MPa下的最小蠕变速率可用蠕变方程ε_(min)=A(σ)4.7exp(-280/RT)来描述;在该蠕变条件下的蠕变行为主要受位错攀移控制.
研究瞭名義成分為Ti-46Al-2Cr-2Nb-0.15B閤金在700～850℃.140～300MPa的蠕變條件下的蠕變性能和蠕變機製.研究錶明,在蠕變過程中隨著溫度和載荷的增加,閤金的最小蠕變速率隨之增大;TiAl基閤金在700～850℃,140～300MPa下的最小蠕變速率可用蠕變方程ε_(min)=A(σ)4.7exp(-280/RT)來描述;在該蠕變條件下的蠕變行為主要受位錯攀移控製.
연구료명의성분위Ti-46Al-2Cr-2Nb-0.15B합금재700～850℃.140～300MPa적연변조건하적연변성능화연변궤제.연구표명,재연변과정중수착온도화재하적증가,합금적최소연변속솔수지증대;TiAl기합금재700～850℃,140～300MPa하적최소연변속솔가용연변방정ε_(min)=A(σ)4.7exp(-280/RT)래묘술;재해연변조건하적연변행위주요수위착반이공제.
The creep behavior and creep mechanism of nominal composition Ti-46A1-2Cr-2Nb-0.15B alloy under the condition of 700～850℃,140～300 MPa was studied.The results show that the minimum creep rate increases with the increase of temperature and stress,the minimum creep rate under the condition of 700～850℃,140～300 MPa can be diseribed by the creep equation of ε_(min)A(σ)4.7exp(-280/RT)and creep behavior is controlled by dislocation climb under the condition.
