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Method to prevent abnormal grain growth for beta annealed TI-6AL-4V forgings
Method to prevent abnormal grain growth for beta annealed TI-6AL-4V forgings
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机译:防止β退火TI-6AL-4V锻件异常晶粒长大的方法
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摘要
A method for heat-treating a titanium alloy, such as Ti-6Al-4V. The method may occur after or include a step of forging the titanium alloy such that localized, highly deformed grains are formed in the titanium alloy. Then the method may include steps of recrystallization annealing the titanium alloy by heating the titanium alloy to a temperature in a range between 30° F. to 200° F. below beta transus of the titanium alloy for 1 hour to 6 hours and then furnace cooling of the titanium alloy to 1200° F. to 1500° F. at a rate of 50° F. to 500° F. per hour. Following the recrystallization annealing, the method may include beta annealing the titanium alloy. These steps may be performed in a single heat treating cycle.
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