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Isothermal forging method for titanium alloy blade

An isothermal forging and titanium alloy technology, applied in the field of warm forging, can solve the problems that the structure and properties are difficult to meet higher technical requirements, the mold does not have a good fixing method, and the temperature difference is large, so as to reduce the mechanical processing steps and mechanical properties. The effect of improving and improving the accuracy of forgings

Inactive Publication Date: 2010-06-16
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The preparation process of titanium alloy blades generally needs to go through billet making, pre-forging and final forging. The ordinary forging method is usually used in the final forging. The temperature difference between the mold and the blank during forging is large. decline, and the mold does not have a good fixing method, it is easy to cause the blank to be displaced in the mold, the prepared blade has a large margin, and the structure and performance cannot meet higher technical requirements; at present, some blades cannot be prepared by domestic technology, and usually require Imported foreign blades

Method used

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  • Isothermal forging method for titanium alloy blade
  • Isothermal forging method for titanium alloy blade
  • Isothermal forging method for titanium alloy blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Apply a lubricant on the surface of the pre-forged titanium alloy blade blank, and the thickness of the lubricant is 0.3mm; preheat the high-temperature rotary hearth furnace to 950±10°C, and then place the blade blank in the high-temperature rotary hearth furnace. The blade blank is heated to 950±10°C.

[0031] Fix the two bearing pads on both sides of the lower mold base with bolts respectively, fix the lower mold base in the isothermal forming heater with bolts, fix the upper and lower molds on the upper and lower mold bases with bolts respectively, and the mold and mold base The matching clearance of the surface is ≤0.5mm.

[0032] Fix the isothermal forming heater on the hydraulic press, energize and heat the isothermal forming heater, raise the temperature of the upper and lower molds and upper and lower mold bases to 930°C, and keep them warm for 5 hours.

[0033] Take the blade blank from the high-temperature rotary hearth furnace and put it into the upper and ...

Embodiment 2

[0036] Apply a lubricant on the surface of the pre-forged titanium alloy blade blank, and the thickness of the lubricant is 0.4mm; preheat the high-temperature rotary hearth furnace to 950±10°C, and then place the blade blank in the high-temperature rotary hearth furnace. The blade blank is heated to 950±10°C.

[0037] Fix the two bearing pads on both sides of the lower mold base with bolts respectively, fix the lower mold base in the isothermal forming heater with bolts, fix the upper and lower molds on the upper and lower mold bases with bolts respectively, and the mold and mold base The matching clearance of the surface is ≤0.5mm.

[0038] Fix the isothermal forming heater on the hydraulic press, energize and heat the isothermal forming heater, raise the temperature of the upper and lower molds and upper and lower mold bases to 920°C, and keep them warm for 4 hours.

[0039] Take the blade blank from the high-temperature rotary hearth furnace and put it into the upper and ...

Embodiment 3

[0042] Apply a lubricant on the surface of the pre-forged titanium alloy blade blank, and the thickness of the lubricant is 0.5mm; preheat the high-temperature rotary hearth furnace to 950±10°C, and then place the blade blank in the high-temperature rotary hearth furnace. The blade blank is heated to 950±10°C.

[0043] Fix the two bearing pads on both sides of the lower mold base with bolts respectively, fix the lower mold base in the isothermal forming heater with bolts, fix the upper and lower molds on the upper and lower mold bases with bolts respectively, and the mold and mold base The matching clearance of the surface is ≤0.5mm.

[0044] Fix the isothermal forming heater on the hydraulic press, energize the isothermal forming heater to heat, raise the temperature of the upper and lower molds and the upper and lower mold bases to 900°C, and keep them warm for 3 hours.

[0045] Take the blade blank from the high-temperature rotary hearth furnace and put it into the upper a...

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Abstract

The invention discloses an isothermal forging method for titanium alloy blade, which is implemented by the following steps: (1) coating lubricant on the surface of pre-forged titanium alloy blade blank; pre-heating with an electrothermal furnace to the deformation temperature of the blade blank; (2) fixing a lower die holder in an isothermal molding heater, and respectively fixing the upper die and the lower die on the upper die holder and lower die holder; (3) fixing the isothermal molding heater on a hydraulic press, heating to 900-930 DEG C and maintaining the temperature for at least 3h; (4) taking the blade blank out of the electrothermal furnace, putting into the upper die and the lower die in the isothermal molding heater, forging by the hydraulic press, and controlling the hydraulic press to perform return stroke operation when the dimension of the blade blank satisfies the requirement. The titanium alloy blade blank obtained by the inventive method has a preciseness satisfying technical requirement and obviously improved mechanical property.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to an isothermal forging method for a titanium alloy blade. Background technique [0002] The preparation process of titanium alloy blades generally needs to go through billet making, pre-forging and final forging. The ordinary forging method is usually used in the final forging. The temperature difference between the mold and the blank during forging is large. decline, and the mold does not have a good fixing method, it is easy to cause the blank to be displaced in the mold, the prepared blade has a large margin, and the structure and performance cannot meet higher technical requirements; at present, some blades cannot be prepared by domestic technology, and usually require Import foreign blades. Therefore, improving the precision and performance of titanium alloy blades is the primary problem to be solved. Contents of the invention [0003] Aiming at the problems in the exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J3/00B21J1/06B21J13/03
Inventor 崔树森韩立夫陈晓峰汪大成郑渠英王文丰
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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