TA7 titanium rod

1. TA7 and TA7ELI alloys are typical alpha type alloys, with a nominal composition of Ti-5Al-2.5Sn. Aluminum and tin play a role in stabilizing alpha and solid solution strengthening.

2. TA7 alloy cannot be strengthened by heat treatment, and can only achieve alpha phase solid solution strengthening through recrystallization annealing. The starting temperature for recrystallization is 580 ℃, and the β phase transition point is approximately 1020-1030 ℃; The recrystallization annealing temperature is 700~750 ℃ for plates and 800~850 ℃ for bars and forgings; The annealing temperature for stress relief is 550~600 ℃.

3. TA7 alloy has moderate strength and good creep resistance and thermal stability. The long-term working temperature can reach 450 ℃, and the short-term working temperature can reach 800-850 ℃.

4. TA7 alloy has good low-temperature performance and welding performance. As the temperature decreases, the strength increases and the plasticity slightly decreases. TA7ELI alloy with low content of interstitial elements maintains good plasticity at -250 ℃ and is commonly used as ultra-low temperature and high-pressure vessels, mainly supplied in sheet and bar materials.

5. The process plasticity of TA7 alloy is relatively low, and sheet metal stamping must be carried out in a heated state, usually heated to around 700 ℃ for sufficient process shaping

Overview of TA7 Titanium Alloy

TA7 alloy is a medium strength alpha titanium alloy that cannot be strengthened by heat treatment. It is usually used in an annealed state and has good fracture toughness at room temperature and high temperature. This alloy has excellent welding performance and is suitable for tungsten electrode and metal electrode welding processes under inert gas protection. Can be used to manufacture parts such as casing shells and wall panels. The long-term working temperature of this alloy can reach 500 ℃, and the short-term working temperature can reach 800 ℃. TATELI alloys with low gap impurity elements are suitable for use at low temperatures. The semi-finished products produced include plates, bars, cakes, and rings, and can also be used to produce castings.

TA7，TA7ELI，ZTA7。

Similar brand

Ti-5Al-2.5Sn (USA), BT5-1 (Russia), IMI317 (UK).

Application Overview of TA7 Titanium Alloy

The engine adapter, front casing shell, sealing ring shell, as well as the lining plate, bracket seat, and wall plate formed by hot pressing of TA7 alloy forging and ring parts have been used in the aviation industry.

TA7 Material Technical Standards

GB/T 3620.12007 "Titanium and Titanium Alloy Grades and Chemical Composition"

GB/T 3620.22007 "Chemical Composition and Allowable Deviation of Titanium and Titanium Alloy Processing Products"

GB/T 150732014 "Cast Titanium and Titanium Alloy Grades and Chemical Composition"

GB/T 3621-2007 "Titanium and Titanium Alloy Plates"

GB/T 66121986 "TA7 Titanium Alloy Plates for Important Applications"

GB/T 25051995 "Specification for titanium and titanium alloy plates and strips for aviation use"

GB/T 36232007 "Titanium and Titanium Alloy Wire"

GB/T 29652007 "Titanium and Titanium Alloy Rod"

GJB 2218A2008 "Specification for titanium and titanium alloy bars and forgings for aviation use"

GJB 2220A2018 "Specification for Titanium Alloy Cake and Ring Blanks for Aircraft Engines"

GJB 2744A2007 "Specification for titanium and titanium alloy free forgings and die forgings for aviation use"

GB/T 6614214 "Titanium and Titanium Alloy Castings"

HB 72381595 "Titanium Alloy Ring Forging"

GJB 2896A2007 "Specification for Titanium and Titanium Alloy Investment Mold Precision Castings"

HB 54481990 "Titanium and Titanium Alloy Investment Precision Castings"

AMS4910K1994 "Annealing 5Al-2.5Sn Titanium Alloy Thin, Strip, and Thick Plates"

AMS 4966L1998 "Annealed 5Al-2.5Sn Titanium Alloy Forgings with a Yield Strength of 760MPa"

heat treatment schedule

Annealed sheet: 700-800 ℃, 10-120min, air-cooled;

Bar and forgings: 750-850 ℃, 0.5-4h, air-cooled; Casting: 600-700 ℃, 1-2 hours, air-cooled or furnace cooled.

Stress relief annealing at 540-650 ℃ for 15-360 minutes, air cooling or furnace cooling.

Under an argon pressure of 100-140MPa, at 910 ℃ ± 10 ℃, for 2-2.5h, cool in the furnace until the hot isostatic pressing treatment of the casting is below 300 ℃.