TC4 titanium alloy is an alloy that makes up titanium alloy rod metal element titanium. It is a high-performance Ti-Al-Sn-Zr-Mo-W-Si alloy type α+β thermodynamic titanium alloy. It combines the high thermal properties of the TA2 alloy with the hot and non-chaotic properties of the TA1 alloy and is suitable for long working periods of 500 ~ 550 ° C.
It is reported that working hours below 500 ° C can reach 6000h and 550 ° C up to 3000h. Therefore ,TC4 titanium alloy is the ideal thermal strength titanium alloy for hair ideas, which can be used to manufacture parts of aerospace hair idea compressors. The alloy can be processed into forging parts, bars, die forging and other forms of products.
The effect of soluble temperature and cooling mode on the structure and function of BT25 titanium alloy forging was studied. The results show that the microstructure of air cooler is smaller than that of furnace cooler at uniform soluble temperature. The soluble temperature is above the phase change temperature, the air cooling is higher than the furnace cold room temperature strength, but the impact toughness and plastic index change is not great.
Phase transition temperature above the soluble temperature, the uniform soluble temperature is slightly higher than the furnace cold room temperature strength, impact toughness and section shrinkage rate is much higher, the elongation rate is little change, but yield strength is slightly reduced. High temperature intensity with the progress of cooling rate and a slight trend of progress, plastic index change is not significant. The choice of soluble temperature is 30 ~ 40 ° C below the phase transition point, insulation 2h air-cooled + 550 ° C,6h air-cooled heat treatment rail, can ensure the best fit of alloy plasticity and strength.
