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Manufacturing method for titanium alloy large-specification ring piece with basket-weave microstructure

A technology of mesh basket structure and manufacturing method, applied in metal rolling, manufacturing tools, metal rolling and other directions, can solve the problem of not giving full play to the needs of durability and creep performance, shorten the holding time, improve the comprehensive performance, The effect of lasting resistance increase

Active Publication Date: 2020-06-23
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

This obviously cannot give full play to the demand for durability and creep performance of high-temperature stress-bearing parts such as the casing and the afterburner cylinder.

Method used

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  • Manufacturing method for titanium alloy large-specification ring piece with basket-weave microstructure
  • Manufacturing method for titanium alloy large-specification ring piece with basket-weave microstructure
  • Manufacturing method for titanium alloy large-specification ring piece with basket-weave microstructure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The raw material is Ф300×400mm TC17 titanium alloy bar. The weight percentages of the alloy components are Al: 5.00%, Cr: 4.01%, Zr: 1.98%, Mo: 3.81%, Sn: 2.00%, Fe: 0.06% , C: 0.02%, H: 0.005%, O: 0.056%, N: 0.006%, the balance is Ti and other unavoidable impurity elements, the β phase transformation point of the alloy ingot detected by metallographic method is 905℃; bar structure It is a two-state structure, the volume fraction of the primary α phase is about 40%, and the low-magnification structure is fuzzy crystals.

[0037] The preparation process of the ring is as follows:

[0038] 1) Preparation of ring-rolled billet: heat the billet to 875°C, and perform upsetting and punching on a hydraulic press in turn after holding the temperature for 240 minutes to obtain a ring billet with an outer diameter of 410mm, an inner diameter of 130mm, and a height of 200mm. The upsetting deformation is 50%, the deformation rate is 0.067s -1 ; Reshape the blank after punching;

[0039]...

Embodiment 2

[0045] The raw material is made of TC17 titanium alloy bar with a specification of Ф300×500mm. The weight percentages of the alloy components are Al: 5.05%, Cr: 3.98%, Zr: 2.00%, Mo: 3.86%, Sn: 1.98%, Fe: 0.05% , C: 0.017%, H: 0.008%, O: 0.07%, N: 0.005%, the balance is Ti and other unavoidable impurity elements, the β phase transformation point of the alloy ingot detected by metallographic method is 905℃; bar structure It is a two-state structure, the volume fraction of the primary α phase is about 40%, and the low-magnification structure is fuzzy crystals.

[0046] The preparation process of the ring is as follows:

[0047] 1) Ring-rolled billet preparation: The billet is heated to 875°C, and then upset and punched in a hydraulic press after 240 minutes of holding time to obtain a ring billet with an outer diameter of 470mm, an inner diameter of 130mm, and a height of 200mm. The upsetting deformation is 60 %, the deformation rate is 0.08s -1 ; Preferably, the blank is shaped aft...

Embodiment 3

[0054] The raw material is Ti6246 titanium alloy bar with a specification of Ф300×400mm. The weight percentage of each component of the alloy is Al: 6.1%, Sn: 2.0%, Zr: 4.01%, Mo: 6.02%, Fe: 0.04%, C: 0.005% , H: 0.006%, O: 0.07%, N: 0.005%, the balance is Ti and other unavoidable impurity elements, the metallographic method detects the β phase transition point of the alloy ingot is 937℃; the bar structure is a dual-state structure, The volume fraction of primary α phase is about 40%, and the low-magnification structure is fuzzy crystals. The preparation process of the ring is as follows:

[0055] 1) Preparation of ring-rolled billet: heat the billet to 907°C, hold for 240 minutes and then perform upsetting and punching in a 2000t hydraulic press to obtain a ring billet with an outer diameter of 410mm, an inner diameter of 130mm and a height of 200mm. The upsetting deformation is 50%, the deformation rate is 0.07s -1 ; Preferably, the blank is shaped after punching;

[0056] 2) H...

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Abstract

The invention discloses a manufacturing method for a titanium alloy large-specification ring piece with a basket-weave microstructure, in particular to a manufacturing method for an alpha + beta two-phase titanium alloy large-specification ring piece. The manufacturing method is characterized by comprising the following steps that 1) a titanium alloy blank is heated to 20-50 DEG C below a beta phase transformation point, upset, punched and shaped to obtain a ring rolling blank; 2) then the ring rolling blank is reamed at the 20-50 DEG C below the phase transformation point to the process size;and 3) then the ring rolling blank is ring-rolled and formed at 25-80 DEG C above the phase transformation point; and finally solid solution + aging dual heat treatment is carried out to obtain the titanium alloy ring piece. The titanium alloy ring piece prepared through adopting the process is the basket-weave microstructure, has high fracture toughness, durability, and creep resistance, and meets the design requirements of the high damage tolerance and durability and the creep resistance of annular components such as a machine box, and a force application cylinder for an aerospace engine ona titanium alloy material better.

Description

Technical field [0001] The invention belongs to the field of titanium and titanium alloy processing, and in particular relates to a method for manufacturing a large-size titanium alloy ring with mesh basket organization. Background technique [0002] High-temperature titanium alloys include near-α type and α+β two-phase titanium alloys. Near-α type titanium alloys have excellent high-temperature creep and endurance properties, but the strength, fracture toughness and plasticity are low; α+β two-phase titanium alloys have good plasticity and strength High, but low temperature creep and endurance resistance. In addition, the properties of titanium alloys are also greatly affected by the microstructure. The typical microstructure types of titanium alloys mainly include equiaxed, bimodal, mesh basket and Widmanstatten structure. The equiaxed structure has good tensile plasticity and fatigue strength, but the endurance and creep strength are low; the basket structure has higher creep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/00B21J1/06B21J1/02B21J5/08B21J5/10B21D1/00B21D3/00B21D41/02B21B37/74B21B37/56B21B37/00C21D9/40C22F1/18C22C14/00
CPCB21B45/004B21J1/06B21J1/02B21J5/08B21J5/10B21D1/00B21D3/00B21D41/02B21B37/74B21B37/56B21B37/00C21D9/40C22F1/183C22C14/00
Inventor 赵子博王清江刘建荣
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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