TA15钛合金β热变形对组织特征参数的影响规律研究

Effect of β Hot Process on Structure Parameters for TA15 Titanium Alloy

研究了TA15钛合金β区变形时变形温度、变形量、变形速率、冷却条件等热工艺参量对β晶粒尺寸D,α集束尺寸d,α片厚b的影响。结果表明:随变形温度增加,D,d,b呈现峰谷值变化,1050℃温度时,D,d最小,b最大,1050℃以上,温度增加,D,d增大,b减小;随变形量增加,D,d,b均下降;变形速率增加,D,d减小,b稍有增加;变形后水淬大于空冷的D,而d,b则相反。

Effect of hot process parameters in β field for TA15 titanium alloy, such as deformation temperature, strain, strain rate and cooling condition on β grain size D, α-colony size d and α-lamina thickness b has been investigated. The experimental results show that D, d and b present peak or vale with increasing temperature, D, d increases but b decreases with increasing temperature above 1050℃, D and d is the minimum but b is the maximum when 1050℃; D, d and b decrease with increasing strain; D, d decreases but b increases with increasing strain rate; D of water quenching is larger than that of the air cool after deformation, however d and b is reversed.