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Method for producing airplane riveting wire coil from Belta-type titanium alloy

A titanium alloy and riveting technology, applied in the field of aviation materials, can solve the problems of difficult control of titanium alloy composition, low coil wire yield, tensile strength, shear strength reduction of section and shear fatigue life, etc., to achieve satisfactory results. Effects of cold riveting process on plasticity, metallographic structure and mechanical properties, high room temperature tensile properties

Inactive Publication Date: 2011-04-13
BAOJI CHUANGXIN METAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the tensile strength, shear strength, reduction of area and shear fatigue life of the titanium alloy riveted wire material prepared by using TC4 material are greatly reduced under heat exposure, which will seriously affect the safety performance of the aircraft
In recent years, other high-temperature-resistant titanium alloys are also actively looking for alternatives to TC4 materials. However, due to the difficulty in controlling the composition of the new titanium alloys and defects in the manufacturing process of the coils, the yield of the manufactured coils is extremely low and cannot be produced. Wire Rod for Automatic Cold Riveting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Select the β-type titanium alloy billet, cut it into 90×90×210mm blocks, grind the edges and corners with a grinding wheel, and then forge the billet, select the carbon-silicon rod furnace to heat, keep it at 1050°C for 2 hours, and use a 750Kg air-cooled hammer during the process. Forging, forging a titanium alloy with a specification of 90×90×210mm into a size of 55×55×570mm, then holding it at 1050°C for 30 minutes, and then going through elongation, chamfering, and round forging to forge a titanium alloy with a specification of Φ60×610mm Forged bar; hot-rolled after peeling and flattening on a lathe; after peeling, the size changes from Φ61 to Φ55mm. The hot-rolling equipment is a van-type resistance furnace. The heating time is 55 minutes and the temperature is 1050 ° C. A reversible vacuum rolling mill is used to process the materials in turn. 11 passes of staggered rolling through square and rhombus passes, turning the titanium alloy with a specification of Φ55mm ...

Embodiment 2

[0044] Select the β-type titanium alloy billet, cut it into 90×90×210mm blocks, grind the edges and corners with a grinding wheel, then forge and open the billet, heat it in an oil furnace, keep it at 1050°C for 2 hours, and use a 750Kg air-cooled hammer for forging during the period. Forging a titanium alloy with a specification of 90×90×210mm into a size of 55×55×570mm, and then holding it at 1050°C for 30 minutes, and then after drawing, chamfering, and rounding forging, forging a titanium alloy forging rod with a specification of Φ60×610mm ; After peeling and flattening on a lathe, hot rolling is carried out; after peeling, the size is changed from Φ61 to Φ55mm. The hot rolling equipment is a box-type resistance furnace, the heating time is 60 minutes, and the temperature is 1050 ° C. Using a reversible vacuum rolling mill, the materials are sequentially passed through the square , rhombus pass rolling for 11 passes, turning the titanium alloy with a specification of Φ55mm ...

Embodiment 3

[0046] Select the β-type titanium alloy billet, cut it into 90×90×210mm blocks, grind the edges and corners with a grinding wheel, and then forge the billet, select electric furnace heating, keep it at 1050°C for 2 hours, and use a 750Kg air-cooled hammer during forging. Titanium alloy with specifications of 90×90×210mm is forged to 55×55×570mm, and then kept at 1050°C for 30 minutes, and then after drawing, chamfering and rounding forging, forging into a titanium alloy forging rod with a specification of Φ60×610mm; After peeling and flattening on the lathe, hot rolling is carried out; after peeling, the size changes from Φ61 to Φ55mm. The hot rolling equipment is a box-type resistance furnace, the heating time is 58 minutes, and the temperature is 1050 ° C. Using a reversible vacuum rolling mill, the material is sequentially passed through the square, The diamond-shaped pass is staggered for 11 passes, and the titanium alloy with a specification of Φ55mm is turned into a squar...

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Abstract

The invention discloses a method for producing an airplane riveting wire coil from Belta-type titanium alloy, comprising the following steps: forging a rod billet, hot pressing a strip billet, hot swaging and cold swaging to obtain the wire, carrying out solid solution treatment to the wire, polishing the surface of the wire and applying chemical coating to the surface of the wire. The produced wire coil has good tensile performance at room temperature, high shearing strength and good shearing fatigue performance and has stable metallographic structure and mechanical performance after being exposed at 250 DEG C for 300h and 300 DEG C for 200h. In addition, the produced wire coil has satisfactory cold riveting process plasticity, can be used for cold hand riveting and cold press riveting and can form an ideal tail when being used for riveting.

Description

technical field [0001] The invention belongs to the technical field of aviation materials, and relates to a method for preparing riveted coil wires for aircrafts with β-type titanium alloys. Background technique [0002] The manufacturing materials of aircraft are mainly aluminum and titanium alloys. Cold-worked aluminum and titanium alloys have good mechanical properties, while aluminum and titanium alloys are difficult to weld, and welding is easy to deform, anneal, and soften, reducing mechanical properties. Therefore, the workpieces on the aircraft are mainly riveted. In the process of riveting, it is necessary to use titanium alloy riveting wire material. The production of titanium alloy riveting wire materials originated in the 1960s, and was successfully developed and industrialized in the 1970s. As titanium alloy rivets used in supersonic aircraft, thermal stability is a very important performance element index. Titanium alloy riveting coils have been using TC4 ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J15/00
Inventor 马宝林杨彦昌徐冰
Owner BAOJI CHUANGXIN METAL MATERIALS
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