中国有色金属学报
中國有色金屬學報
중국유색금속학보
THE CHINESE JOURNAL OF NONFERROUS METALS
2013年
1期
116-121
,共6页
热压缩变形%电铸%Ni-W合金%变形激活能%本构方程
熱壓縮變形%電鑄%Ni-W閤金%變形激活能%本構方程
열압축변형%전주%Ni-W합금%변형격활능%본구방정
hot compression deformation%electroformed%Ni-W alloy%deformation activation energy%constitutive equation
采用Gleeble?1500型热模拟机对电铸Ni-W合金在变形温度为400~600℃、应变速率为0.001~0.1 s?1条件下的热压缩变形进行研究,分析合金变形时的流变应力、应变速率及变形温度之间的关系,研究变形温度对合金显微组织的影响,并得到本构方程.结果表明:应变速率和变形温度对该材料的流变应力有显著影响,流变应力随变形温度的升高而降低,随应变速率的提高而增大.当变形温度高于550℃时,合金流变曲线呈现出明显的动态再结晶特征,合金显微组织为完全的动态再结晶组织,该合金的热变形激活能为411.55 kJ/mol.
採用Gleeble?1500型熱模擬機對電鑄Ni-W閤金在變形溫度為400~600℃、應變速率為0.001~0.1 s?1條件下的熱壓縮變形進行研究,分析閤金變形時的流變應力、應變速率及變形溫度之間的關繫,研究變形溫度對閤金顯微組織的影響,併得到本構方程.結果錶明:應變速率和變形溫度對該材料的流變應力有顯著影響,流變應力隨變形溫度的升高而降低,隨應變速率的提高而增大.噹變形溫度高于550℃時,閤金流變麯線呈現齣明顯的動態再結晶特徵,閤金顯微組織為完全的動態再結晶組織,該閤金的熱變形激活能為411.55 kJ/mol.
채용Gleeble?1500형열모의궤대전주Ni-W합금재변형온도위400~600℃、응변속솔위0.001~0.1 s?1조건하적열압축변형진행연구,분석합금변형시적류변응력、응변속솔급변형온도지간적관계,연구변형온도대합금현미조직적영향,병득도본구방정.결과표명:응변속솔화변형온도대해재료적류변응력유현저영향,류변응력수변형온도적승고이강저,수응변속솔적제고이증대.당변형온도고우550℃시,합금류변곡선정현출명현적동태재결정특정,합금현미조직위완전적동태재결정조직,해합금적열변형격활능위411.55 kJ/mol.
The hot compression deformation of electroformed Ni-W alloy was studied in the temperature range of 400?600℃and strain rate of 0.001?0.1 s?1 by using Gleeble?1500 thermal simulation tester. The relationships among the flow stress, the strain rate and deformation temperature were researched. The effect of deformation temperature on microstructure of the ally was investigated. The results show that the flow stress decreases with the increase of deforming temperature, while it increase with the increase of strain rate. When the deformation temperature is higher than 550℃, the flow curves and microstructures present apparent character of dynamic recrystallization. The hot deformation activation energy of the alloy is 411.55 kJ/mol.
