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A method for equidistant spiral rolling of large-size titanium alloy ultra-fine-grained rods

An equidistant spiral, titanium alloy technology, used in metal rolling, metal rolling, rolls and other directions, can solve the problems of low efficiency, large load, limited size, etc., to achieve large penetration, small load, rolling load small effect

Active Publication Date: 2020-06-02
安徽东耘智能设备制造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0024] The purpose of the present invention is to provide an equidistant spiral rolling method 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 method for equidistant spiral rolling of large-size titanium alloy ultra-fine-grained rods
  • A method for equidistant spiral rolling of large-size titanium alloy ultra-fine-grained rods
  • A method for equidistant spiral rolling of large-size titanium alloy ultra-fine-grained rods

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Experimental program
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Effect test

Embodiment 1

[0066] Using the above technical parameters, design and process roll 1 such as figure 1 shown;

[0067] S1: The main deformation parameters are titanium alloy TC18, the diameter D is 100mm, and the length is 800mm; the radius r of the biting arc of the spiral roll shape is 100mm, the feeding angle α is 16°, the cone angle is 17°, and the rolling angle is 17°, the roll distance Dg is 87.5% of the billet diameter D, the pass ellipticity coefficient is 1.23, and the speed n of roll 1 is 40r / min;

[0068] S2: Heating the cylindrical titanium alloy blank at 2 to 845°C in a heating furnace for 70 minutes;

[0069] S3: transfer the heated titanium alloy billet 2 from the heating furnace to the guide groove of the skew rolling mill, and the transfer time is 10s;

[0070] S4: The titanium alloy blank 2 moves helically in the deformation zone until the deformation ends.

[0071] S5: Repeated rolling 2 times and 6 times sampling analysis, its effect on titanium alloy grain refinement ...

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Abstract

The invention discloses an equal-distance spiral rolling method for large-size titanium alloy ultrafine grain bars and relates to the technical field of machining. The equal-distance spiral rolling method for the large-size titanium alloy ultrafine grain bars comprises the following steps that S1, titanium alloy blanks with the diameter size D being 40-150 mm and the length being 300-5000 mm are selected; S2, the titanium alloy blanks are put into a heating furnace to be heated to 840-1025 DEG C; S3, the heated titanium alloy blanks are transferred to a guide groove of a skew rolling mill fromthe heating furnace, and the transferring time is 5-20 seconds; S4, feeding is performed in the guide groove of the skew rolling mill, the titanium alloy blanks are fed into a deformation area between an inlet and an outlet of the skew rolling mill, and the titanium alloy blanks spirally move in the deformation area until deformation is finished; and S5, the steps S2-4 are repeated, the titaniumalloy blanks are spirally rolled for 2-6 times, and the TC18 titanium alloy overall ultrafine grain bars are obtained. The equal-distance spiral rolling method for the large-size titanium alloy ultrafine grain bars has the beneficial effects that the penetration depth of the deformation area is large, and multi-pass rolling can be performed in a reciprocating mode. Continuous, stable and local deformation is achieved, pressure-twisting composite three-dimensional severe deformation is achieved, and the ideal grain refinement effect can be obtained.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to an equidistant spiral rolling method for large-scale titanium alloy ultra-fine-grained rods. Background technique [0002] Ultrafine crystal / nanocrystalline materials are one of the hot topics in current material science research. Compared with traditional coarse-grained metal materials, ultra-fine-grained / nanomaterials show more excellent or unique properties in some aspects, such as higher strength and hardness, better fatigue performance and superplasticity, better Corrosion resistance, wear resistance and biological characteristics, etc. These excellent properties make ultra-fine-grained materials have broad application prospects in engineering fields such as aviation, aerospace, automobiles, marine, and biology, and also make people pay more attention to the development of ultra-fine-grained / nano-prepared technologies. Compared with traditional coarse-grained...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B1/16B21B3/00B21B27/02C21D8/06
CPCB21B1/16B21B3/00B21B27/025B21B27/028C21D8/06
Inventor 庞玉华罗远林鹏程康荻娜何威威陈益哲
Owner 安徽东耘智能设备制造有限责任公司
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