( α+β) Titanium alloy β Large deformation forging at high temperatures above the phase transition point β Forged forgings are not equidistant at room temperature α Phase, low plasticity. Normal（ α+β) Titanium alloy is used in β Forged below the transformation temperature is called（ α+β) Forged or conventional forging. Due to the low forging temperature, the malleability of the alloy has not been fully utilized, making it difficult to forge complex forgings with high processing capacity and low material utilization. In response to the above issues, we have developed β forging. In order to fully utilize in actual production β Characteristics of forgings, adopted in steel billets β Forge and then apply β Complete forging at transition temperature.
And（ α+β) Compared to forging, β Forging has the following advantages:
1、 Ti-6Al-4V titanium alloy undergoes a transformation temperature of 50 ° C above β When, the deformation resistance is reduced by 50%.
2、 Forgings have high temperature and low deformation resistance. Forgings with similar shapes to the parts can be forged on the same equipment, resulting in low processing costs and low material consumption.
III β The elongation and area reduction of forgings are low, and the fracture toughness is high, β The creep performance of forgings has significantly improved.
4、 The use of small tonnage forging equipment can significantly reduce the deformation resistance of forgings and produce larger forgings.
β The forging method was still in the development stage in the 1990s and has not been widely applied in production. However, titanium alloys are moving towards containing more β The direction of stable element development, β The transformation temperature is getting lower and lower, and the difficulty of room temperature forging is becoming greater, leading to development β Forgings will have greater practical significance.