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Technique for processing titanium alloy sheet material

A processing technology, titanium alloy technology, applied in metal processing equipment, manufacturing tools, metal rolling, etc., can solve the problems of alloy microstructure inhomogeneity, unstable material quality, narrow process window, etc., and achieve wide processing window and toughness And the effect of good plasticity matching and improved batch stability

Active Publication Date: 2008-03-12
西安大富宇航科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] From the perspective of improving the damage tolerance of materials, nearly β forging, β heat treatment and other processes developed in recent years have overemphasized the role of temperature and require very strict control of temperature, that is, the process window is very narrow, which is difficult to do in production practice. It is easy to cause the local thermal effect to be too high, resulting in serious inhomogeneity of the alloy structure, making the quality of the material unstable

Method used

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  • Technique for processing titanium alloy sheet material

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Experimental program
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Effect test

Embodiment 1

[0012] (1) Ingot smelting

[0013] Use high-quality grade 0 sponge titanium, industrial pure aluminum, and Al-85V master alloy with low impurity content. After cladding alloy, electric-level pressing, plasma group welding, and finally using secondary vacuum consumable arc smelting method to smelt a 1 ton ingot, the size is: Φ420×1510mm. The weight percentages of the ingot components are Al: 6.16%, V: 3.95%, Fe: 0.03%, C: 0.04%, N: 0.014%, O: 0.06%, H: 0.001%, Si: <0.03%.

[0014] (2) Ingot blooming

[0015] The billeting temperature is selected to be 1100°C, heated by a natural gas furnace, and billeting is opened on a 1600T hydraulic press. The billet is divided into three fires to complete. After the ingot is charged at 900℃ and heated to 1100℃, it is forged out of the furnace after holding for 6 hours. After three times of upsetting (the reduction is about 110mm), the first fire is completed; the second fire is at 1000 After being kept at ℃ for 4h, one-way stretch forging; afte...

Embodiment 2

[0021] (1) Ingot smelting

[0022] Use high-quality grade 0 sponge titanium, industrial pure aluminum, and Al-85V master alloy with low impurity content. After cladding alloy, electric-level pressing, plasma group welding, and finally using secondary vacuum consumable arc smelting method to smelt a 1 ton ingot, the size is: Φ420×1510mm. The weight percentages of the ingot components are Al 6.24%, V 4.3%, Fe<0.01%, C 0.022%, N 0.011%, O 0.1%, and H 0.004%.

[0023] (2) Ingot blooming

[0024] The billeting temperature is selected to be 1100°C, heated by a natural gas furnace, and billeting is opened on a 1600T hydraulic press. Each section of billeting is divided into three fires to complete. After the ingot is loaded at 900°C and heated to 1100°C, it is heated for 6h and forged out. After three upsetting (the reduction is about 110mm), the first fire is completed; the second fire After being kept at 1000℃ for 4h, one-way stretch forging; after the third fire is kept at 970℃ for 18...

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Abstract

The invention discloses a processing process for a Ti-alloy sheet, which comprises such procedures as packing alloy on sponge titanium, industrial pure aluminum and Al-85V intermediate alloy, pressing and plasma welding the sponge titanium, the industrial pure aluminum and the Al-85V intermediate alloy, then smelting through a secondary vacuum self-consuming arc smelting method the sponge titanium, the industrial pure aluminum and the Al-85V intermediate alloy into cast ingots, cutting blanks from the cast ingots, blanketing the cut blanks into sheet blanks, forging freely on an air hammer into sheet blanks, rolling on a roller at temperature 900-1000 DEG C, holding the temperature for 50 minutes (deformation in each pass is 3-4 mm at initial rolling, rolling 2-5 passes, interrupting intermediately), finally rolling into Ti-alloy sheets, planing and cleaning surface, and getting finished product. The invention is of easy operation, high process controllability, enables TC4-DT alloy sheet to maintain good matching among strength, breakage toughness and plasticity, and improves the steadiness in performance of different sheet lots.

Description

Technical field [0001] The invention relates to a processing method of an alloy plate, in particular to a novel processing technique of a TC4-DT low-gap titanium alloy plate. Background technique [0002] Ti-6Al-4V is the most widely used and most mature typical (α+β) two-phase titanium alloy. It has been developed in various countries for nearly 40 years and has its own alloy brand. Its composition characteristics are: the allowable fluctuation range of alloy elements is wider (Al: 5.5%-6.75%), and the allowable content of impurities is higher (Fe: 0.3% max, O: 0.2% max, H: 0.015% max); Higher possibility of metallurgical defects, lower plasticity and toughness and shorter service life. For this reason, a few developed countries led by the United States and Britain have developed corresponding low-gap alloys in the past 20 years, such as United States UNS R56401, ASTM F468, Grade 23, AMS4930, Ti-64ELI, United Kingdom IMI318ELI, France TA6VELI, etc. It is used in important fields...

Claims

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Application Information

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IPC IPC(8): C22C14/00C22C1/03B21J1/06B21B37/00C22F1/18
Inventor 毛小南李辉于兰兰
Owner 西安大富宇航科技有限公司
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