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A spiral conical roller equidistant rolling method for large-scale titanium alloy ultra-fine-grained rods

A titanium alloy, ultra-fine grain technology, applied in metal rolling, metal rolling, rolls, etc., can solve the problems of limited size, large load, low efficiency, etc., achieve small load, small rolling load, deep penetration big effect

Active Publication Date: 2020-01-31
重庆两航金属材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0023] The object of the present invention is to provide a method for equidistant rolling of helical conical rollers for large-scale titanium alloy ultra-fine-grained rods, so as to solve the problems of limited size, large load and low efficiency in the above-mentioned background technology.

Method used

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  • A spiral conical roller equidistant rolling method for large-scale titanium alloy ultra-fine-grained rods
  • A spiral conical roller equidistant rolling method for large-scale titanium alloy ultra-fine-grained rods
  • A spiral conical roller equidistant rolling method for large-scale titanium alloy ultra-fine-grained rods

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Embodiment 1

[0067] Using the above technical parameters, design and process the spiral rolling roll 1 such as figure 1 shown;

[0068] S1: The main deformation parameters are titanium alloy TC18, the diameter D is 100mm, and the length is 800mm. The rolling angle β is 18°, the pitch ι of the spiral roll 1 is 13 mm, the tooth height h is 9 mm, the spacing Dg of the roll 1 is 88% of the diameter D of the billet, the ellipticity coefficient is 1.25, and the rotating speed n of the roll 1 is 32 r / min;

[0069] S2: Heating the titanium alloy cylindrical billet to 850°C in a heating furnace for 80 minutes;

[0070] S3: transfer the billet heated to temperature from the heating furnace to the guide groove of the skew rolling mill, and the transfer time is 10s;

[0071] S4: The blank moves spirally in the deformation zone until the deformation ends;

[0072] S5: Repeated rolling 2 times and 6 times sampling analysis, its effect on titanium alloy grain refinement is significant, the grain size ...

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Abstract

The invention relates to the technical field of machining, in particular to a large-size titanium alloy ultrafine-grained bar spiral tapered roller equidistant rolling method. The method comprises thefollowing steps of S1, selecting a titanium alloy billet with the diameter D being 40-150 mm and the length being 300-5000 mm; S2, heating the titanium alloy billet in a heating furnace to 800-1120 DEG C; S3, transferring the heated titanium alloy billet from the heating furnace to a guide chute of a skew rolling machine; S4, feeding the titanium alloy billet in the guide chute of the skew rolling machine to a deformation area between an inlet and an outlet of the skew rolling machine, and enabling the titanium alloy billet to do spiral motion in the deformation area until deformations is ended; and S5, repeating the steps S2-S4 to conduct 2-8 times of spiral rolling on the titanium alloy billet to obtain a TC18 titanium alloy integral ultrafine-grained bar. The method has the beneficialeffects that the penetration depth of the deformation area is large; multiple passes of rolling can be conducted repeatedly; local deformation is continuous and stable; the ideal grain refinement effect can be achieved through pressing-twisting combined three-dimensional severe deformation.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a method for equidistant rolling of large-size titanium alloy ultra-fine-grained rods with helical conical rolls. Background technique [0002] When using plastic deformation to prepare nano-scale materials, the equivalent strain should usually be greater than 6, which is difficult to achieve with traditional plastic processing methods, but can be achieved by applying Severe Plastic Deformation (SPD). Modern SPD started from the combined forming method of high pressure and shear deformation proposed by Bridgemen, and its rapid development began in the mid-1970s in the former Soviet Union and Western countries. Segal developed the Equal-Channel Angular Pressing technology (Equal-Channel Angular Pressing, ECAP), It marks the arrival of the microstructural era of SPD research. Over the past 10 years, thousands of research results have been published. [0003] The def...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/16B21B27/02
CPCB21B1/16B21B27/025
Inventor 刘东张喆王建国杨艳慧李晓龙张福祥胡阳王海王海平
Owner 重庆两航金属材料有限公司
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