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Forging method for reducing forging temperature of TC4 alloy blade

A technology for forging temperature and blades, applied in engine components, mechanical equipment, etc., can solve the problems of reduced forgeability of titanium alloys, easy cracking of forgings, excessive deformation resistance, etc., and achieve the effect of optimizing forging process parameters.

Inactive Publication Date: 2012-01-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Directly lowering the forging temperature will lead to a sharp drop in the forgeability of titanium alloys, which is manifested in excessive deformation resistance and easy cracking of forgings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Step 1, solid-state hydrogen placement: put After the surface of the TC4 alloy cylinder was cleaned with acetone, it was placed in a tube-type solid state hydrogenation furnace, and the vacuum was evacuated to 1.0×10 -3 Pa, heated to 700°C at a speed of about 5°C / min, kept at a temperature of about 10 minutes, filled with 0.5% hydrogen according to the weight percentage of the titanium alloy billet, and the flow rate of filled hydrogen was 0.5L / min, kept at a temperature of about 3 hours, at about 10°C Cool down to room temperature at a speed of 1 / min; step 2, mechanical processing: machine the solid state hydrogenation titanium alloy into a solid hydrogenation titanium alloy prefabricated billet; step three, sand blowing and grinding: carry out solid state hydrogenation titanium alloy prefabricated blank surface Sand blasting and grinding; step 4, spraying lubricant: spray Tianli Chuang brand Ti-5D glass lubricant on the surface of the solid hydrogenated titanium allo...

Embodiment 2

[0014] Step 1, solid-state hydrogen placement: put After the surface of the TC4 alloy cylinder was cleaned with acetone, it was placed in a tube-type solid state hydrogenation furnace, and the vacuum was evacuated to 1.0×10 -3 Pa, heated to 800°C at a speed of about 15°C / min, kept at a temperature of 15 minutes, filled with 0.2% hydrogen according to the weight percentage of the titanium alloy billet, and the flow rate of filled hydrogen was 1L / min, kept at a temperature of 2h, and kept at a temperature of about 5°C / min. Cool down to room temperature at a speed of 1 min; step 2, mechanical processing: machine the solid hydrogenated titanium alloy into a solid hydrogenated titanium alloy prefabricated billet; step 3, sand blowing and grinding: perform sand blasting on the surface of the solid hydrogenated titanium alloy prefabricated billet and grinding treatment; step 4, spraying lubricant: spray Tianli Chuang brand Ti-5D glass lubricant on the surface of the solid hydrogenat...

Embodiment 3

[0016] Step 1, solid-state hydrogen placement: put After the surface of the TC4 alloy cylinder was cleaned with acetone, it was placed in a tube-type solid state hydrogenation furnace, and the vacuum was evacuated to 10 -3 Pa, heated to 750°C at a rate of about 10°C / min, kept at a temperature of about 10 minutes, filled with 0.2% hydrogen according to the weight percentage of the titanium alloy blank, and the flow rate of filled hydrogen was 1.5L / min, kept at a temperature of about 2 hours, at about 10°C Cool to room temperature at a speed of 1 / min; step 2, mechanical processing: machine the solid state hydrogenation titanium alloy into a solid hydrogenation titanium alloy prefabricated billet; step three, sand blowing and grinding: blow the surface of the solid state hydrogenation titanium alloy prefabricated billet Sanding and grinding; step 4, spray lubricant: spray Tianli Chuang brand Ti-5D glass lubricant on the surface of the solid hydrogenated titanium alloy prefabrica...

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Abstract

The invention relates to a forging method for reducing the forging temperature of a TC4 alloy blade, which is used for solving the technical problem of high forging temperature of a traditional TC4 titanium alloy. The invention has the technical scheme that the forging method comprises the following steps of: carrying out solid hydrogen distributing treatment on the TC4 alloy; machining the obtained solid hydrogen distributing titanium alloy blank after treatment into a solid hydrogen distributing titanium alloy prefabricated blank; blowing sand and polishing; spraying a lubricating agent; mounting a die and preheating; forging the solid hydrogen distributing titanium alloy prefabricated blank to obtain a solid hydrogen distributing titanium alloy blade forging piece; removing flash; blowing sand and polishing; and removing hydrogen. The TC4 titanium alloy is subjected to solid hydrogen distributing treatment, so that the forging temperature of the TC4 titanium alloy is reduced to 720-780DEG C from 800-982DEG C in the prior art.

Description

technical field [0001] The invention relates to a forging method of a titanium alloy blade, in particular to a forging method for reducing the forging temperature of a TC4 alloy blade. Background technique [0002] The working conditions of turbofan aeroengine fan blades are relatively harsh, and titanium alloys have a series of advantages such as high specific strength, corrosion resistance and high temperature resistance, which makes titanium alloys widely used in the field of fan blades. Titanium alloy is a hard-to-deform material, and the complexity of the fan blade shape leads to poor forging process and high forging temperature. [0003] Document 1 "Heat Treatment and Forging of Titanium and Titanium Alloys, Compilation and Compilation of Foreign Aviation Data, National Defense Industry Press, 1970.5, page 57" reports that the die forging temperature range of TC4 alloy is 899-982 °C. [0004] Document 2 "China Aeronautical Materials Handbook (Volume 4), edited by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K3/04
Inventor 李淼泉于卫新罗皎
Owner NORTHWESTERN POLYTECHNICAL UNIV
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