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β锻造、固溶和时效处理的Ti-17合金,其显微组织是由原始β晶粒中以“时效β”为基的粗大魏氏α片组成。这种显微组织具有诸如抗蠕变和疲劳断裂性能的良好匹配作用。然而,热机械加工Ti-17成薄截面,快速冷却,则形成低断裂韧性的细小的α+β片状组织。控制锻后冷却速率,意味着无需再固溶处理就可获得粗大的片状显微组织。冷却速率作用的研究可以用来确定预变形结果是否影响Ti-17合金的CCT图(连续冷却相变图)。研究发现锻造对高温转变机制存在一定影响,但对显微组织的影响在低温下变弱。
β forging, solution and aging treatment of Ti-17 alloy, the microstructure of the original β grains from “aging β ” based coarse Wolffia Alpha film composition. This microstructure has good matching properties such as creep resistance and fatigue fracture properties. However, the thermomechanical processing of Ti-17 into thin sections, rapid cooling, the formation of low fracture toughness of the small α + β sheet structure. Controlling the cooling rate after forging means that coarse, flaky microstructures can be obtained without further solution treatment. The study of the effect of cooling rate can be used to determine whether the pre-deformation results affect the CCT diagram of the Ti-17 alloy (continuous cooling transformation). The study found that forging has a certain impact on the mechanism of high temperature transformation, but the effect on the microstructure weakened at low temperatures.