Preparation method of 550-650 DEG C high-temperature titanium alloy foil

A high-temperature titanium alloy and titanium alloy technology, applied in metal rolling, metal processing equipment, weight reduction, etc., to achieve the effect of weakening rolling texture, refining grain size, and weakening phase change texture

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

[0004] Existing patents at home and abroad rarely involve the preparation process and method of high-temperature titanium alloy foils at 550°C to 650°C. The demand is becoming more and more urgent. It not only requires high-temperature titanium alloy foil to have good formability, but also requires high tensile strength at room temperature and high temperature (550 ° C ~ 650 ° C)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of TA32 Titanium Alloy Foil with a Thickness of 0.1mm

[0037] Step 1, melting the TA32 titanium alloy ingot whose target composition is Ti-5.20Al-3.5Sn-3.0Zr-1.0Mo-0.4Nb-0.4Ta-0.25Si, and putting the titanium alloy ingot in a heating furnace at a temperature of 1100°C Heat preservation for 200 minutes, forging on a forging machine, the final forging temperature is not lower than 1000°C, and obtain a billet for rolling, the size of the obtained billet is 150mm×500mm×600mm, and the total deformation in the thickness direction of the billet is not less than 50%;

[0038] Step 2, heat the obtained billet in a heating furnace at a temperature of 950°C for 100 minutes, and carry out billet rolling on a rolling mill to obtain a slab with a thickness of 10 mm. The number of rolling passes is 3 times, and the total deformation of each rolling pass is 70 to 75 %;

[0039] Step 3: after shearing the obtained slab, keep it in a heating furnace at 50°C above the β tran...

Embodiment 2

[0050] Preparation of 0.2mm thick TA33 titanium alloy foil

[0051] Step 1, smelting the TA33 titanium alloy ingot whose target composition is Ti-5.7Al-4.0Sn-3.5Zr-0.9Mo-0.37Si-0.4Nb-1.0Ta-0.06C, and putting the titanium alloy ingot at a temperature of 1150°C Insulate in the heating furnace for 210min, forge on the forging machine, the final forging temperature is not lower than 1000°C, and obtain the billet for rolling.

[0052] Step 2, heat the obtained billet in a heating furnace at a temperature of 970°C for 120 minutes, and carry out billet rolling on a rolling mill to obtain a slab with a thickness of 12 mm. The number of rolling passes is 3 times, and the total deformation of each rolling pass is 50 to 60 %;

[0053] Step 3: After shearing the obtained slab, keep it in a heating furnace at 60°C above the β transformation point for 90 minutes, and then water quench to room temperature;

[0054] Step 4, after grinding the surface of the obtained slab, keep it in a heati...

Embodiment 3

[0064] Preparation of Ti65 Titanium Alloy Foil with a Thickness of 0.08mm

[0065] Step 1, the smelting target composition is the Ti65 titanium alloy ingot of Ti-5.8Al-4.0Sn-3.5Zr-0.5Mo-0.45Si-0.3Nb-1.0Ta-0.8W-0.06C, and the titanium alloy ingot is heated at a temperature of Insulate in a heating furnace at 1200°C for 200 minutes, then forge on a forging machine, the final forging temperature is not lower than 1000°C, and obtain a billet for rolling. %;

[0066] Step 2, heat the obtained billet in a heating furnace at a temperature of 1000°C for 150 minutes, and carry out billet rolling on a rolling mill to obtain a slab with a thickness of 12 mm. The number of rolling passes is 3 times, and the total deformation of each rolling pass is 50 to 60 %;;

[0067] Step 3: After shearing the obtained slab, keep it in a heating furnace with a temperature of 70°C above the β transformation point for 80 minutes, and water quench to room temperature;

[0068] Step 4, after grinding th...

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Abstract

The invention relates to a preparation method of 550-650 DEG C high-temperature titanium alloy foil. The method specifically comprises the following steps of (1) heating a high-temperature titanium alloy cast ingot at 1100-1200 DEG C, and then carrying out forging to obtain a blank; (2) carrying out heating at 950-1000 DEG C, and then carrying out rolling; (3) carrying out heat treatment at 50-70 DEG C above a beta phase transformation point, and then carrying out water quenching cooling to room temperature to obtain a plate blank; (4) carrying out heating at 950-1000 DEG C, and then carrying out rolling; (5) carrying out assembly welding on the obtained blank to obtain a cladding ply-rolling pack; (6) heating the ply-rolling pack at 950-1000 DEG C, and then carrying out rolling; (7) opening the ply-rolling pack, and carrying out secondary assembly welding on the blank to obtain a cladding ply-rolling pack; (8) heating the ply-rolling pack at 900-950 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 to obtain a plate with the thickness of 0.6 mm; (10) shearing the plate, and then carrying out cold rolling 7-25 times to obtain rolled foil with the thickness of 0.08-0.2 mm; and (11) carrying out vacuum annealing heat treatment to obtain the finished foil with the thickness ranging from 0.08 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 high-temperature titanium alloy foil at 550°C to 650°C. Background technique [0002] 550℃~650℃ high-temperature titanium alloys are mainly used in high-temperature structural components of aero-engines and aerospace hypersonic vehicles. At present, my country's self-developed high-temperature titanium alloys include TA32, TA33 and Ti65 titanium alloys. The long-term service temperatures are 550°C, 600°C and 650°C respectively. The above high-temperature titanium alloy plates have been used in aero-engines and supersonic aircraft. Thermal structural components such as barrels, fuselages, and wings. [0003] High-temperature titanium alloy foils with a service temperature of 550°C to 650°C have broad application prospects in high-temperature load-bearing structural parts in the aerospace field. High-temperature titaniu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/40B21B1/38B21C37/02B21J5/00C22F1/18C22F1/02
CPCB21B1/40B21B1/38B21C37/02B21J5/002C22F1/183C22F1/02B21B2001/386Y02T50/40
Inventor 王清江陈志勇刘建荣朱绍祥
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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