Titanium alloy for forging aviation disc piece

Abstract

The invention discloses a titanium alloy for forging an aviation disc piece. The titanium alloy comprises the following components in percentage by weight: 5.20-5.80% of Al, 3.50-4.50% of Mo, 0.80-2.50% of Zr, 0.80-2.50% of Sn, 0.70-1.50% of W, 0.10-0.25% of Si, 0.05-0.10% of Fe, 0.15-0.20% of C, 0.10-0.20% of Cr, less than or equal to 0.15% of O, less than or equal to 0.04% of N, less than or equal to 0.012% of H, less than or equal to 0.10% of Cu and the balance of Ti.

Description

technical field [0001] The invention relates to a forging method, in particular to a titanium alloy for forging an aerospace disc. Background technique [0002] Due to the harsh working environment and complex stress, the compressor discs and turbine discs of aero-engines are often forged with α+β two-phase titanium alloys with excellent comprehensive properties, such as TC17 and BT25. The disc forged with α+β type titanium alloy has a series of advantages such as high strength, good fracture toughness, high hardenability and wide forging temperature range, which can meet the needs of damage tolerance design and high structure and high reliability. The requirements of high performance and low manufacturing cost, and these excellent comprehensive properties must be guaranteed by the ideal microstructure of forgings. In terms of the forging method of the two-phase titanium alloy, the Chinese invention patent specification CN1403622A published on March 19, 2003 discloses a tit...

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Problems solved by technology

[0005] However, the invention is still based on BT25 alloy, which is a traditional alloy. Although its performance is excellent, with the development of technology and the improvement of aero-engine performance, the requirements for high-temperature alloys are also getting higher and higher. The lower BT25 alloy can no longer meet the needs of use, so it is urgent to develop new alloy types and forging processes