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Preparation method of fine-grain TA15 titanium alloy foil

A titanium alloy foil, titanium alloy technology, applied in the direction of metal rolling, metal rolling, metal processing equipment, etc., to achieve the effect of weakening the phase change texture, weakening the rolling texture, and refining the grain size

Active Publication Date: 2021-11-02
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the development and processing of TA15 titanium alloy foil has not been carried out in China, so it is necessary to conduct research on the processing technology and heat treatment process of the foil to meet the demand for TA15 titanium alloy foil in the aerospace field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of 0.1mm thick TA15 titanium alloy foil

[0037] Step 1, smelting the TA15 titanium alloy ingot whose target composition is Ti-6.5Al-1.4Mo-1.4V-2.0Zr-0.05O, keeping the titanium alloy ingot in a heating furnace at a temperature of 1100°C for 200 minutes, and placing it on a forging machine Carry out slab forging, the final forging temperature is not lower than 980°C, and obtain a slab for rolling, the size of the obtained slab is 120mm×465mm×515mm, and the total deformation in the thickness direction of the slab is not less than 80%;

[0038] Step 2, heat the obtained slab in a heating furnace at a temperature of 960° C. for 100 minutes, and carry out billet rolling on a rolling mill to obtain a billet with a thickness of 10 mm, the number of rolling passes is one time, and the deformation is 92%;

[0039] Step 3: After cutting the obtained billet, keep it in a heating furnace with a temperature of 30°C above the β transformation point for 60 minutes, and wa...

Embodiment 2

[0050] Preparation of TA15 titanium alloy foil with a thickness of 0.2mm

[0051] Step 1, melting the TA15 titanium alloy ingot whose target composition is Ti-6.5Al-1.2Mo-1.2V-2.0Zr-0.1O, keeping the titanium alloy ingot in a heating furnace at a temperature of 1050°C for 240min, and placing it on a forging machine Carry out slab forging, the final forging temperature is not lower than 980°C, and obtain a slab for rolling, the size of the obtained slab is 115mm×465mm×515mm, and the total deformation in the thickness direction of the slab is not less than 80%;

[0052] Step 2, heat the obtained slab in a heating furnace at a temperature of 900° C. for 150 minutes, and carry out billet rolling on a rolling mill to obtain a billet with a thickness of 12 mm. The number of rolling passes is one time, and the amount of deformation is 90%;

[0053] Step 3: After cutting the obtained billet, keep it in a heating furnace with a temperature of 50°C above the β transformation point for 9...

Embodiment 3

[0064] Preparation of TA15 titanium alloy foil with a thickness of 0.15mm

[0065] Step 1, melting the TA15 titanium alloy ingot whose target composition is Ti-6.5Al-1.6Mo-2.2V-2.1Zr-0.06O, keeping the titanium alloy ingot in a heating furnace at a temperature of 1050°C for 220min, and placing it on a forging machine Carry out slab forging, the final forging temperature is not lower than 980°C, and obtain a slab for rolling, the size of the obtained slab is 125mm×465mm×515mm, and the total deformation in the thickness direction of the slab is not less than 80%;

[0066] Step 2, heat the obtained slab in a heating furnace at a temperature of 920° C. for 120 minutes, and carry out billet rolling on a rolling mill to obtain a billet with a thickness of 8 mm. The number of rolling passes is one time, and the amount of deformation is 93%;

[0067] Step 3: After cutting the obtained billet, keep it in a heating furnace with a temperature of 40°C above the β transformation point for ...

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Abstract

The invention discloses a preparation method of fine-grain TA15 titanium alloy foil. The preparation method specifically comprises the following steps of (1) heating a TA15 titanium alloy cast ingot at 1000-1100 DEG C, and then carrying out cogging forging to obtain a plate blank; (2) carrying out heat preservation at 900-960 DEG C, and then carrying out rolling; (3) carrying out heat treatment at 30-50 DEG C above a beta phase transformation point, and then carrying out water quenching cooling; (4) carrying out heating at 900-940 DEG C, and then carrying out rolling; (5) carrying out assembly welding on the obtained blank to obtain a cladding ply-rolling pack; (6) carrying out heating at 900-940 DEG C, and then carrying out rolling for the fourth time; (7) opening the ply-rolling pack, and then carrying out assembly welding on the blank to obtain a cladding ply-rolling pack; (8) carrying out heating at 920-940 DEG C, and then carrying out rolling in a direction perpendicular to the previous rolling direction; (9) carrying out annealing, creep correction, alkali pickling and sanding on the blank to obtain a plate with the thickness of 0.6 mm; (10) shearing the plate, and then carrying out cold rolling multiple times to obtain rolled foil with the thickness ranging from 0.1 mm to 0.2 mm; and (11) carrying out vacuum annealing heat treatment to obtain the finished foil with the thickness ranging from 0.1 mm to 0.2 mm.

Description

technical field [0001] The invention belongs to the technical field of titanium alloy material processing, and in particular relates to a preparation method of fine-grained TA15 titanium alloy foil. Background technique [0002] TA15 titanium alloy is a high-temperature titanium alloy with a long-term service temperature of 500 ° C. The main semi-finished product of this alloy is a plate, which is widely used in high-temperature structural parts in the field of aviation and aerospace. In order to achieve the purpose of high temperature resistance and weight reduction, high temperature titanium alloy foil has become the main titanium alloy semi-finished product of the honeycomb structure in aerospace aircraft and hypersonic vehicles. Under the high temperature environment of 400 ℃ ~ 500 ℃, the strength and plasticity of TC4 titanium alloy foil can no longer meet the requirements of high temperature resistance. [0003] In the invention patents with authorized notification nu...

Claims

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Application Information

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IPC IPC(8): B21B1/22B21B1/38B21B3/00B21B45/00B21B15/00B21B47/00C22F1/18C21D9/46C22F1/02
CPCB21B1/22B21B1/38B21B3/00B21B45/004B21B15/0035B21B15/00B21B47/00B21B15/0007C22F1/002C22F1/183C21D9/46C22F1/02B21B2001/225B21B2261/20B21B2001/386
Inventor 陈志勇王清江朱绍祥刘建荣
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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