摘要
基于TC17合金β跨相区锻造试验,研究了始锻温度、变形程度、锻后冷却方式对TC17钛合金组织和性能的影响。试验表明：TC17钛合金的显微组织演变和室温力学性能对于β锻造参数表现出不同程度的敏感性;随着始锻温度的升高,晶粒细化程度增大,不同的始锻温度可显著影响合金的强度;通过增大合金的变形程度可显著改善组织中的残留魏氏组织,进而对强度产生较大影响,合金内部粗晶组织的变形不均匀化进一步增强;锻后冷却方式为缓冷时,晶内次生α相长度增加,可有效提高合金的断裂韧性。在始锻温度为918℃、变形程度为60%、锻后冷却方式为缓冷的条件下,TC17钛合金的室温力学性能匹配较佳。
Based on β forging experiment of titanium alloy TC17,the influences of initial forging temperature,deformation degree and cooling mode after forging on microstructures and mechanical properties of titanium alloy TC17 were studied. The experiment shows that the microstructure evolution and mechanical properties at room temperature of titanium alloy TC17 appear varying degrees of sensitivity to the parameters of the β forging. With the increase of the initial forging temperature,the grain refinement increases,and the different initial forging temperature can significantly affect the strength of titanium alloy TC17. However,the increase of deformation degree of titanium alloy can significantly improve the residual Widmanstatten organization,and the strength of titanium alloy TC17 is expected greatly.Therefore,the deformation inhomogenization of the coarse grain structure inside the alloy is further enhanced. Thus,when the cooling mode is slow-cooling after forging,the length of the intracry-stalline secondary α phase increases and the fracture toughness of alloy is effectively improved. At the initial forging temperature of 918℃,the deformation degree of 60% and the slow-cooling,the mechanical properties of titanium alloy TC17 at room temperature are better.
作者
袁士翀
王周田
高志刚
王敏
郭鸿镇
姚泽坤
Yuan Shichong;Wang Zhoutian;Gao Zhigang;Wang Min;Guo Hongzhen;Yao Zekun(China National Erzhong Group Co. , Deyang 618000, China;School of Materials Science and Engineering, Northwestern Polytechnical University, Xi＇an 710072, China;Envision Energy, Jiangyin 214400 , China)
出处
《锻压技术》
CAS
CSCD
北大核心
2018年第2期14-19,共6页
Forging & Stamping Technology
关键词
TC17钛合金
Β锻造
显微组织
力学性能
冷却方式
titanium alloy TC17
β forging
microstructure
mechanical properties
cooling mode
