冷卻速度對VST55531鈦合金的顯微組織和力學性能的影響
發布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時間：2016-01-20
研究不同冷卻速度(水冷、空冷和爐冷)對VST55531合金的顯微組織和拉伸性能的影響。
冷卻速度對VST55531鈦合金的顯微組織和力學性能的影響Effects of cooling rate on microstructure and properties of VST55531 alloy研究不同冷卻速度(水冷、空冷和爐冷)對VST55531合金的顯微組織和拉伸性能的影響。結果表明：合金分別經820 ℃和900 ℃固溶處理及580 ℃時效后，其強度隨冷卻速度的減小而逐漸降低，塑性逐漸升高。合金在900 ℃固溶的組織為粗大b晶粒的魏氏組織，其固溶水冷和空冷及時效后獲得的強度最高，達到1 400 MPa。合金經820 ℃固溶及時效后，獲得雙態組織，且塑性較好；經820 ℃，1 h固溶空冷和580 ℃，4 h時效的合金，具有較高的強度和較好的塑性匹配。
The microstructures and tensile properties of VST55531 alloys with different cooling rates were studied，including water cooling, air cooling and furnace cooling. The results show that when the cooling rate gets slower, the strength decreases while the plasticity increases. When the alloy is solution treated at 900 ℃ and then aged, the main microstructure is Widmanstatten with coarse β grain and the strength can reach 1 400 MPa with water cooling and air cooling methods. When the alloy is solution treated at 820 ℃ and then aged, the microstructure is bi-modal with good plasticity. The alloy has better balance of strength and plasticity under aging treatment of 820 ℃, 1 h solution (air cooling) and 580 ℃, 4 h.
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