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Study on Processes & Microstructure and Mechanical Properties of a New Kind Titanium Alloy

Author: MengQiang
Tutor: YanXueBai
School: Xi'an University of Architecture and Technology
Course: Materials Processing Engineering
Keywords: BT421111 Ti-alloy processing technology sheet annealing
CLC: TG115
Type: Master's thesis
Year: 2006
Downloads: 221
Quote: 4
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Abstract


BT421111 Titanium Alloy is a alloy with good comprehensive properties which is developed lately. It has the advantages of high strength, good plasticity, excellent cold workability and so on. This alloy is strengthened by α-stable chemical element Al, at the same time, join definite masses of neutral element Zr and β- stable element Mo and V to achieve complemented strengthening, and join Sn to make not the room temperature plasticity dropped, however, heat resistance is increasing.In this paper, the research work is developed for meeting the demand of BT421111 Titanium Alloy, and producing 1.10mm alloy plate ,the effects of A and B two different treatments (whether β treating and reverse rolling or not) on semi-finished and finished microstructure and properties is discussed. On the base of theory analysis, adopting tensile test and metallic phase analysis, we research the effect of treatment on BT421111 Titanium alloy plate’s try result of mechanical properties and microscopic structure. The hot rolling and cold rolling technical process are mastered, and also the heat treatment of the semi-finished and finished products.The result shows that the mechanical properties of the semi-finished product of hot rolling annealed between temperature of 750℃ and 870℃ is rising with increasing of annealing temperature, the better of extensibility and plasticity can be obtained at temperature of 780℃,which is optimally annealing temperature. The plate will split when degree of single-pass deformation exceed to 40%. The sheet has high accurate and good surface quality after β treating and reverses rolling. After solution treatment and aging treatment, the finished product hasexcellent microstructure and mechanical properties and high plastic deformation performance. The finished sheet can meet the challenge of consumer’s demands.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metallurgy ( Physical Metallurgy ) > Analytical tests of the metal (Metal Testing and Materials )
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