Method for extruding and precisive roller forging thermal strength titanium alloy blades

A titanium alloy and blade technology, applied in the field of precision roll forging, can solve the problems of high deformation resistance, precision roll forging forming technology has not yet been broken through, low plasticity, etc., to achieve protective lubricating coating, low hydrogen content, good comprehensive Effects on performance and organization

Inactive Publication Date: 2003-09-03
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Abstract
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AI Technical Summary

Problems solved by technology

Beginning in 1974, the present inventor carried out the research of titanium alloy roll forging process, and successfully cold roll forged TC3 titanium alloy blade without margin in 1981, but heat-strength titanium alloy, due to its low plasticity in cold state, The high deformation resistance and the unique O and N pollution embrittlement problems different from other alloys in the hot state have not made a breakthrough in precision roll forging technology at home and abroad.

Method used

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Examples

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Embodiment Construction

[0026] Example 1, choose TC11, Φ28 titanium alloy hot-rolled rods as raw materials (produced by Shanghai No. β Heating at -(50°C±10°C) for 20min, out of the furnace and flattening on a press into a flat material of 13×45mm, then through caustic soda and sodium nitrate mixed molten alkali tank, at 480~500°C, for 30min water quenching alkali Chipping to remove the glass lubricant and sand blasting, and then use a milling machine to cut the material one by one along the transverse fiber direction, and grind off the oxygen-enriched layer on both sides of the surface. Above-mentioned blank is sprayed with FR6 (market sale) glass lubricant, and heating temperature is t β -(30℃±10℃), keep warm for 15min, and preheat the mold to 150℃ at the same time, choose Bd for the mold 2 Aqueous low temperature glass lubricant. The billet is placed in the mold, and is extruded once with a 2T-M liquid steam hammer. Extruded blades are polished, alkali collapsed and sand blasted to remove burrs ...

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Abstract

A technology for manufacuring Ti-alloy blade of air compressor by thermal sequence and precise forging includes such steps as blanking, coating glass lubricant, thermal squeezing, grinding for removing glass lubricant, chemical milling for removing polluted layer, vacuum recrystallizing, annealing, machining cog and arc corner hot forging removing glass lubricant and polluted layer again, vacuum dehydrogenating recrystallizing, annealing, calibrating, annealing and precise machining. Its advantages are simple process, low cost and high performance of product.

Description

Technical field [0001] The invention relates to a precision forging method of alloy blades, in particular to a precision roll forging process for titanium alloy blades, in particular to a precision roll forging process suitable for heat-strength titanium alloy blades. Background technique [0002] Blade production is a very important part of the aero-engine manufacturing industry, and the level of blade manufacturing technology reflects the level of engine manufacturing technology to a certain extent. Since the aero-engine blade is a complex-shaped part with a curved surface in space, it is often necessary to use profiling milling or electrolysis and other processing technologies in the processing process. The performance of modern engines requires higher and higher alloying of blade materials, so the processing difficulty is becoming more and more difficult. Therefore, in some developed countries, even if the precision forging process is very expensive, blade manufacturing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21H7/16B21K3/04B23P15/02C22F1/18
CPCC23F1/26
Inventor 吴自然杨景金刘秋生孙永昌张叶盛郝树本胡蔚兰
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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