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A kind of preparation method of tc6 titanium alloy large size bar

A titanium alloy and large-scale technology, which is applied in the field of preparation of large-scale titanium alloy rods of TC6, can solve the problems of reducing the number of forging fires in large-scale titanium alloy processing, low production efficiency, and reducing the number of fires, etc., to achieve excellent product quality, Good tissue uniformity and the effect of reducing the number of fires

Active Publication Date: 2022-07-08
WESTERN TITANIUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the TC6 titanium alloy ingot is subjected to one-fire drawing square billet forging, which breaks the coarse as-cast structure in the TC6 titanium alloy ingot, reduces the number of fires for subsequent forging of the TC6 titanium alloy ingot, and passes through phase transformation. Above the temperature, the first-fire long-drawing and spheroidal forging is carried out, and the second-to-third-fire long-drawing and spheroidal forging is carried out under the phase transition temperature, which effectively breaks the long strip structure and further refines the structure. The cross-sectional diameter is 100mm ~ 210mm. The TC6 titanium alloy large-size bar with a length of 2000mm-4000mm solves the shortcomings of low efficiency and long process of conventional large-size titanium alloy processing and preparation, and effectively reduces the number of forging fires when processing large-size titanium alloys.

Method used

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  • A kind of preparation method of tc6 titanium alloy large size bar
  • A kind of preparation method of tc6 titanium alloy large size bar
  • A kind of preparation method of tc6 titanium alloy large size bar

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0030] This embodiment includes the following steps:

[0031] Step 1, the TC6 titanium alloy ingot is subjected to one-fire square billet forging to obtain a primary billet; the TC6 titanium alloy ingot is a cylindrical ingot with a cross-sectional diameter of 690 mm, and the transverse The section is a square with a side length of 500mm, the initial forging temperature in the billet forging is 1150°C, the forging ratio is 2.4, the material-width ratio is 1.2, and the reduction ratio is 15%;

[0032] Step 2: Slitting and blanking the primary billet described in Step 1, and then carrying out the first firing of the primary billet after slitting and blanking under the condition that the initial forging temperature is (Tβ+50) ℃ Lengthening and spheronizing forging to obtain an intermediate billet; the Tβ is the β phase transition temperature of the TC6 titanium alloy, and the unit of Tβ is °C; The cutting rate is 15%, and the surface grinding treatment is carried out after the f...

Embodiment 2

[0038] This embodiment includes the following steps:

[0039] Step 1, the TC6 titanium alloy ingot is subjected to one-fire square billet forging to obtain a primary billet; the TC6 titanium alloy ingot is a cylindrical ingot with a cross-sectional diameter of 720 mm, and the transverse The section is a square with a side length of 410mm, the initial forging temperature in the billet forging is 1100°C, the forging ratio is 1.8, the material-width ratio is 0.8, and the reduction ratio is 40%;

[0040] Step 2: Slitting and blanking the primary billet described in Step 1, and then carrying out the first firing of the primary billet after slitting and blanking under the condition that the initial forging temperature is (Tβ+40) ℃ Lengthening and spheronizing forging to obtain an intermediate billet; the Tβ is the β phase transition temperature of the TC6 titanium alloy, and the unit of Tβ is °C; The reduction rate is 40%, and the surface grinding treatment is performed after the f...

Embodiment 3

[0046] This embodiment includes the following steps:

[0047] Step 1, the TC6 titanium alloy ingot is subjected to one-fire square billet forging to obtain a primary billet; the TC6 titanium alloy ingot is a cylindrical ingot with a cross-sectional diameter of 540 mm, and the transverse The cross section is a square with a side length of 300mm, the initial forging temperature in the billet forging is 1000°C, the forging ratio is 2, the material-width ratio is 1, and the reduction ratio is 20%;

[0048] Step 2: Slitting and blanking the primary billet described in Step 1, and then carrying out the first firing of the primary billet after slitting and blanking under the condition that the initial forging temperature is (Tβ+30) ℃ Lengthening and spheronizing forging to obtain an intermediate billet; the Tβ is the β phase transition temperature of the TC6 titanium alloy, and the unit of Tβ is °C; The cutting rate is 20%, and the surface grinding treatment is carried out after the...

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Abstract

The invention discloses a method for preparing a large-sized TC6 titanium alloy bar, which comprises the following steps: 1. pulling a titanium alloy ingot into square and forging; 3. Slitting and blanking, and then carrying out the second drawing and rounding forging; 4. Performing solution heat treatment and aging heat treatment to obtain large-sized TC6 titanium alloy bars with a cross-sectional diameter of 100mm to 210mm and a length of 2000mm to 4000mm. In the present invention, the rough as-cast structure in the ingot is broken by one-time squaring and forging, and the number of times of forging is reduced. Two to three times of drawing and rounding forging are carried out under the fire, which effectively breaks the long structure and further refines the structure, solves the shortcomings of low processing efficiency and long process of conventional large-scale titanium alloy processing, and effectively reduces the processing of large-scale titanium alloys. Time forging fire times.

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 a TC6 titanium alloy large-sized bar. Background technique [0002] TC6 titanium alloy is a martensitic α-β two-phase titanium alloy with good comprehensive properties. Its nominal composition is Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si, containing α-stabilizing element Al, isomorph β-stabilizing element Mo and eutectoid β-stabilizing elements Cr, Fe and Si. TC6 titanium alloy has high room temperature strength and good thermal strength below 450℃. The alloy also has excellent thermal processing performance, low deformation resistance and high plasticity. TC6 alloy is mainly used to manufacture parts such as compressor discs and blades of aero-engines. The alloy can also be used as a medium-strength alloy to manufacture aircraft bulkheads, joints and other load-bearing structural parts and fasteners for different purposes. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/04B21J5/00C22F1/18
CPCB21C37/04B21J5/002C22F1/183
Inventor 贠鹏飞康聪张哲李维张智欧阳文博黄先明唐进
Owner WESTERN TITANIUM TECH
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