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Forging method for titanium alloy disk-shaped piece

A technology of titanium alloy and disc-shaped parts, applied in the field of forging, can solve the problems that BT25 alloy cannot meet the use requirements, and achieve the effect of excellent mechanical properties

Inactive Publication Date: 2012-11-07
无锡市钻通工程机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for forging a disc-shaped piece of titanium alloy, the titanium alloy is composed of the following components in terms of weight percentage: Al: 5.20%, Mo: 4.50%, Zr: 0.80%, Sn: 2.50%, W: 0.70%, Si : 0.25%, Fe: 0.05%, C: 0.20%, Cr: 0.10%, O: ≤0.15%, N: ≤0.04%, H: ≤0.012%, Cu: ≤0.10%, the balance is Ti, the The forging method comprises the following steps:

[0019] Step 1: Cut the casted round bar of the above-mentioned titanium alloy into a bar ingot according to the forging specification, then put the bar ingot into the forging heating furnace and heat it to 1000°C, and then keep it warm. The holding time is based on the thickness of the bar ingot Calculated at 1 min / mm; put it on the forging press and upset it into a round cake, the thickness of the first round cake is 64% of the length of the primary ingot, and cool it in water immediately after forging;

[0020] Step 2: Put the above-mentioned primary round cake in the forging heating furnace and heat it t...

Embodiment 2

[0025] A method for forging a titanium alloy disc-shaped piece, the titanium alloy is composed of the following components in weight percentage:

[0026] Al: 5.80%, Mo: 3.50%, Zr: 2.50%, Sn: 0.80%, W: 1.50%, Si: 0.10%, Fe: 0.10%, C: 0.15, Cr: 0.20%, O: ≤0.15%, N: ≤0.04%, H: ≤0.012%, Cu: ≤0.10%, and the balance is Ti. The forging method includes the following steps:

[0027] Step 1: Cut the casted round bar of the above-mentioned titanium alloy into a bar ingot according to the forging specification, then put the bar ingot into the forging heating furnace and heat it to 1010°C, and then keep it warm. The holding time is based on the thickness of the bar ingot Calculated at 0.8min / mm; put it on the forging press and upset it into a round cake, the thickness of the first round cake is 68% of the length of the primary ingot, and cool it in water immediately after forging;

[0028]Step 2: Put the above-mentioned primary round cake in the forging heating furnace and heat it to 1030...

Embodiment 3

[0031] A method for forging a titanium alloy disc-shaped piece, the titanium alloy is composed of the following components in weight percentage:

[0032] Al: 5.50%, Mo: 4.00%, Zr: 1.70%, Sn: 1.70%, W: 1.10%, Si: 0.17%, Fe: 0.08%, C: 0.18%, Cr: 0.15%, O: ≤0.15 %, N: ≤0.04%, H: ≤0.012%, Cu: ≤0.10%, and the balance is Ti. The forging method includes the following steps:

[0033] Step 1: Cut the casted round bar of the above-mentioned titanium alloy into a bar ingot according to the forging specification, then put the bar ingot into the forging heating furnace and heat it to 1005°C, and then keep it warm. The holding time is based on the thickness of the bar ingot Calculated at 0.9min / mm; put it on the forging press and upset it into a round cake, the thickness of the first round cake is 66% of the length of the primary ingot 1, and cool it in water immediately after forging;

[0034] Step 2: Put the above-mentioned primary round cake in the forging heating furnace and heat it to...

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Abstract

The invention discloses a forging method for a titanium alloy disk-shaped piece. The titanium alloy consists of 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. The forging method comprises the following steps of: 1) carrying out primary stamping after heating; 2) drawing out; 3) upsetting into a secondary cake, and punching to obtain a blank; 4) carrying out constant-temperature die forging; and 5) carrying out thermal treatment to the disk-shaped piece after forging.

Description

technical field [0001] The invention relates to a forging method, in particular to a forging method of a titanium alloy disc-shaped piece. 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 disclos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00C22C14/00B21K1/32
Inventor 靳玉生
Owner 无锡市钻通工程机械有限公司