澳门新威尼斯8883(中国)有限公司

TB2 Overview

TB2 alloy is a metastable material β Type titanium alloy, containing isomorphic form β Stable elements 5% Mo and 5% V, eutectoid type β Stable element 8% Cr, α The stable element 3% Al has a Mo equivalent of 18.15. This alloy has excellent cold forming performance and good welding performance in the solution treated state, and has high strength and good plasticity matching in the solution aged state. The main drawbacks of this alloy are high density, low elastic modulus, and low resistance to high-temperature creep.

The main semi-finished products of this alloy include plate, strip, foil, bar, wire, etc. Sheet metal can be made into sheet metal parts, pressure vessels, and solid rocket engine shells. The strip can be made into a star arrow connecting strip. Foil can be made into corrugated shells and honeycomb structures. Silk can be cold riveted to produce various head type rivets, and can be both cold and hot riveted. The rivets can be directly used after being riveted in a solution treated state. Bars can be cold forged to produce various head bolts, which can be used in solution treated or solution aged conditions.

This alloy is suitable for manufacturing aerospace fasteners that operate below 300 ℃, as well as aerospace fasteners that operate for a short period of time below 500 ℃.

TB2 Technical Standards

GB/T 3620.1-1994 Titanium and Titanium Alloy Grades and Chemical Composition

GB/T 3620.2-1994 "Chemical composition and permissible deviations of titanium and titanium alloy processed products"

GB/T 3621-1994 Titanium and Titanium Alloy Sheet

K/JC 2-1984 "Provisional Technical Specification for TB2 Alloy Strip for Communication Satellite" Satellite Arrow Connection Belt "

GJB 2219-1994 "Specification for Titanium and Titanium Alloy Rod (Wire) Materials for Fasteners"

TB2 heat treatment system

(1) Solid solution treatment

Select a solution treatment temperature within the range of 750-800 ℃. The usual solution treatment system is 800 ℃± 10 ℃, 3-30 minutes, air cooling or faster cooling.

(2) Timeliness

The aging temperature is selected within the range of 450-550 ℃, and the usual aging system is 500 ℃± 10 ℃, 8-24 hours, air-cooled or furnace cooled.

(3) Stress relief annealing

650-700 ℃, 30-60 minutes, air-cooled or furnace cooled.

TB2 melting and casting process

The alloy should be melted by two or more vacuum consumable electrode arc furnaces.

TB2 Application Overview and Special Requirements

The various specifications of star arrow connection belts made of TB2 alloy strips have been used for a long time in the aerospace industry. Various head type rivets made of TB2 alloy wire through cold forging have been applied in the aviation industry. Bars can be cold forged to produce various types of bolts, such as inner hexagon, outer hexagon, and countersunk head, which can be used in aviation and aerospace industries. The usage temperature for solid solution treatment is below 200 ℃, and the usage temperature for solid solution aging is below 300 ℃.

TB2 corrosion resistance performance

TB2 alloy has good corrosion resistance and contact corrosion resistance. Stainless steel basically does not corrode when in contact with it. Aluminum alloy and structural steel come into contact with it, and the alloy itself does not corrode. Instead, dissimilar metals are corroded. The alloy is anodized, which has little effect on its mechanical properties, but can slow down the corrosion rate of structural steel and aluminum alloy in contact with it.