EB Melting and Plate Preparation of Medium Strength and High Toughness Titanium Alloy
-
摘要: 采用短流程、低成本的一次EB熔炼方法制备钛合金扁锭,然后通过不经锻造直接进行轧制的工艺方案,获得了700 MPa级20 mm厚的Ti-Al-Mo-V-Zr-Sn成分体系钛合金热轧板,研究了热处理工艺对钛合金板材组织、性能的影响。结果表明:通过EB炉一次熔炼可以获得成分均匀的Ti-Al-Mo-V-Zr-Sn系钛合金扁锭,采用在Tβ相变点附近开坯轧制,并在α+β两相区换向轧制及成品退火热处理的工艺方案,获得了中强高韧钛合金板材,且随着热处理温度升高,钛合金板材冲击韧性提升,在900 ℃的热处理温度下获得了最佳的强度和韧性匹配,为中强高韧低成本钛合金板材制备提供了可行方案。Abstract: Titanium alloy flat ingots are prepared by using a short process, low-cost EB melting method, and then rolled directly without forging to prepare a 700 MPa grade 20 mm thick Ti-Al-Mo-V-Zr-Sn system titanium alloy hot rolled plate. The effect of heat treatment process on the microstructure and properties of the titanium alloy plate is studied. The results show that the Ti-Al-Mo-V-Zr-Sn titanium alloy flat ingots with uniform composition can be obtained through one-time EB melting. The medium strength and high toughness titanium alloy plates can be obtained by rolling at the temperature near the Tβ transus, and reversing rolling the α+β zone and annealing the finished product at the temperature below the Tβ transus. With the increase of heat treatment temperature, the impact toughness of titanium alloy plates is improved. The match between strength and toughness is good when the heat treatment temperature is near the Tβ transus and above 900 ℃.
-
Key words:
- titanium alloy /
- EB melting /
- rolling /
- heat treatment /
- medium strength and high toughness
-
[1] 曹春晓.航空用钛合金的发展概况[J].航空科学技术, 2005, 16(4):3-6. [2] 孟祥军,陈春和,余巍,等.几种海洋工程用钛合金及其应用[J].中国造船, 2004, 45(Z):38-43. [3] 于宇,李嘉琪.国内外钛合金在海洋工程中的应用现状与展望[J].材料开发与应用, 2018, 33(3):111-116. [4] 冯秋元,佟学文,王俭,等.低成本钛合金研究现状与发展趋势[J].材料导报, 2017, 31(9):128-134. [5] 李渤渤,张强,裴腾,等. TC4钛合金EB铸坯板材轧制组织及性能研究[J].材料开发与应用, 2020, 35(1):5-9. [6] 郝晓博,张强,李渤渤,等. α+β相区高温退火对Ti80合金板材组织与性能的影响[J].材料开发与应用, 2018, 33(1):49-53. [7] 李渤渤,郝晓博,刘茵琪,等.提高Ti70中厚板塑韧性热加工工艺研究[J].材料开发与应用, 2020, 35(2):33-38. -
点击查看大图
计量
- 文章访问数: 40
- HTML全文浏览量: 8
- PDF下载量: 16
- 被引次数: 0
下载:
