摘要
为了揭示变形程度和变形温度对β预制坯针状组织的影响规律,在800、820、840和860℃这4个不同温度以及20%、40%、60%和80%这4个不同应变量进行小饼等温压缩试验。研究结果表明:变形程度是影响TC17钛合金球化的主要因素。在变形量为40%～60%时,片状α组织受到剪切作用并发生动态再结晶;当变形量大于60%时,组织发生有效球化。在800～860℃温度范围内,变形温度越高,越有利于组织球化。
In order to disclosure the influence of deformation temperature and deformation degree on β preforming acicular structure, small pie isothermal compressing test with different strain levels from 20% to 80% was carried out at four different temperatures ranging from 800 to 860 ℃. The results show that deformation. degree is the key factor which influences the spheroidization of TC17 alloy. When the deformation rate is 40% -60%, lamellar structure of a phase is broken by the shear force and dynamic recrystallization takes place. When the deformation rate is higher than 60%, the spheroidization is effective. In the tempeature range of 800-860 ℃, the higher the temperature, the better the spheroidization.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2010年第B10期167-172,共6页
The Chinese Journal of Nonferrous Metals
关键词
β预制坯
针状组织
球化
动态再结晶
β preform
acicular structure
spheroidization
dynamic recrystallization
