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热变形参数对TC25合金β锻坯微观组织和拉伸性能的影响
英文标题:Influence of hot forming parameters on microstructure and tensile properties of alloy TC25 forging β
作者:张晓园 马驰 史小云 王晓亮 杜予晅 李少强 雷锦文 杜建超 
单位:西部超导材料科技股份有限公司 中航商用航空发动机有限公司 
关键词:TC25合金 β锻造 变形参数 微观组织 拉伸性能 
分类号:TG146.2
出版年,卷(期):页码:2015,40(11):117-121
摘要:
研究了β锻造时不同变形参数下、TC25合金的微观组织演变过程及拉伸性能变化规律。结果表明,随变形量的增大,微观组织由取向一致的魏氏组织逐渐转变为杂乱交织的网篮组织;随变形温度的升高锻件组织分别为三态组织、网篮组织,最后为取向一致的α片束状组织,组织不均匀性急剧增大,出现断续晶界α或连续晶界α及大块α组织。其中三态组织、无序杂乱的网篮组织及少量的晶界α和大块α组织有利于提高合金锻件的高温拉伸强度。为了获得具有优良高温强度的合金锻件,变形参数有两个可选范围:一是变形温度在Tβ+15 ℃左右、变形量35%~50%;另一是变形温度在Tβ+35 ℃左右、变形量45%~60%。
The microstructure evolution and tensile properties of alloy TC25 were conducted at different deformation parameters in β region. The experimental results show that Widmanstaten microstructure transforms into a lamellar microstructure with the increase of deformation degree. Furthermore, with the increase of deformation temperature, the microstructure changes from three states microstructure to lamellar microstructure. Finally, it becomes α sheet bundle microstructure of consistent orientation and inhomogeneity of microstructure increases suddenly and appears intermittent or continuous α grain boundary and bulk α. The above microstructures are beneficial to improve the high temperature tensile strength of the alloy forging. In order to obtain a better alloy forging of high temperature tensile strength, there are two optional ranges for the deformation parameters, one is deformation temperature around Tβ+15 ℃ with the deformation degree within 35%-50%, the other is the deformation temperature around Tβ+35 ℃ with the deformation degree within 45%-60%.
基金项目:
国家国际科技合作专项(2013DFR50090);陕西省科技统筹创新工程计划项目(2013KTLM-01)
作者简介:
张晓园(1984-),男,硕士,工程师
参考文献:


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