Ti—1100合金β热处理组织特性

Microstructural Features of the β-heat-treated Ti-1100 Alloy

对β退火温度和退火时间及冷却速度等对Ｔｉ－１１００合金的β晶粒度及。α＋β片域大小、形状的影响进行了研究，结果表明，Ｔｉ－１１００合金的β晶粒度和。α＋β片域大小随退火温度和时间增加而增大，随冷却速度增大而减小；β晶粒度与退火时间关系可用一幂函数Ｄｎ＝Ｋｔ表示，而与退火温度呈复杂函数关系；自β退火温度下缓冷时产生较大α＋β片域，而快冷时形成网篮状组织。

ffect of the β-annealing temperature and time, and cooling rate on β-grain size.shape and size of lammelar (α+β) colonies have been investigated in the present work.The investigated results exhibit that the size of β-grains and colonies is increasing as the β-annealing temperature is rising and the annealing time is prolonging; and decreasing as the cooling rate is increasifig. The relationship between the β-grain size and the β-annealing time can be described with a power function of D￣n = Kt;while the relationship temperature appears as a complex function. The slower the cooling rate, thelarger the lammelar (α+β) colony size,and on fast cooling, the basket weave structure appears.