TC17钛合金在热变形过程中的组织演变规律  

Microstructure evolvement regularity of TC17 titanium alloy in hot deformation

作　　者：徐斌[1] 王晓英[1] 周建华[1] 王凯旋[2] 曾卫东[2] 

机构地区：[1]宝山钢铁股份有限公司特钢事业部,上海200940 [2]西北工业大学材料科学与工程学院,西安710072

出　　处：《中国有色金属学报》2010年第B10期167-172,共6页The Chinese Journal of Nonferrous Metals

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.

关 键 词：β预制坯 针状组织 球化 动态再结晶 

分 类 号：TG146.2[一般工业技术—材料科学与工程]