【作者】 张颖楠； 赵永庆； 曲恒磊； 李辉； 冯亮； 郭红超； 黄定坤；

【Author】 Zhang Yingnan, Zhao Yongqing, Qu Henglei, La Hui, Feng Liang, Guo Hongchao, Huang Dingkun (Northwest Institute for Nonferrous Metal Research , Xi’an 710016, China)

【机构】 西北有色金属研究院钛合金研究所；

【摘要】 研究在不同热处理制度下,高强高韧TC21钛合金Φ20 mm轧制棒材的组织和室温拉伸性能的变化规律。结果表明,在Tβ(-20-50℃)/1 h AC+600℃/4 h AC处理制度下,TC21合金Φ20 mm棒材的室温拉伸强度和塑性分别为:抗拉强度≥1105 MPa,屈服强度(1000MPa,延伸率≥15%,断面收缩率≥43%。当合金的显微组织为双态组织时,其室温拉伸性能得到良好的匹配。更多还原

【Abstract】 TC21 alloy is a new kind of high strengthand high toughness titanium alloy. The effect of vari- ous heat treatments on microstructures and tension properties at RT of TC21 alloy were investigated. The result shows that the optimum STA heat treatment of TC21 alloy is ( Tβ- 20 - 50℃ )/1 h AC + 600 ℃/4 h AC. Under this STA heat treatment, a better combina-tion of strength and ductility was obtained. Simultaneously, the microstructure of TC21 alloy is equiaxed a grains and basket weave, which benefits the properties of TC21 alloy.更多还原