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

A high-temperature alloy and equidistant spiral technology, applied in the field of spiral rolling, can solve the problems of limited size and refinement, low efficiency, etc., and achieve continuous and stable local deformation, large penetration depth, and stable deformation process

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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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] The purpose of the present invention is to provide a method of spiral rolling with conical rolls and equal roll pitch for large-scale GH4169 superalloy overall ultra-fine-grained rods, so as to solve the problems of limited size and refinement and low efficiency in the above-mentioned background technology

Method used

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  • A method for equidistant spiral rolling of large-size superalloy ultra-fine-grained rods
  • A method for equidistant spiral rolling of large-size superalloy ultra-fine-grained rods
  • A method for equidistant spiral rolling of large-size superalloy ultra-fine-grained rods

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Using the above technical parameters, design and process roll 1 such as figure 1 shown;

[0065] S1: The main deformation parameters are superalloy GH4169, the diameter D is 100mm, and the length is 500mm; the radius r of the biting arc of the spiral roll shape is 100mm, the feeding angle α is 19°, the rolling angle β is 15°, and the cone angle γ1 is 15°, the spacing Dg of roll 1 is 86% of the billet diameter D, the pass ellipticity coefficient is 1.22, and the speed n of roll 1 is 22r / min;

[0066] S2: Heating the cylindrical billet to 945°C in a heating furnace for 70 minutes;

[0067] 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;

[0068] S4: The blank moves spirally in the deformation zone until the deformation ends.

[0069]S5: Repeat steps S2-S4, repeat rolling 2 times and 6 times sampling analysis, it has a significant effect on grain refinement of superalloy, ...

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Abstract

The invention belongs to the technical field of machining, and particularly relates to an equidistant screw rolling method of a large-size high-temperature alloy ultra-fine grain rod. The method comprises the following steps that S1, a high-temperature alloy blank is selected, wherein the diameter dimension D of the high-temperature alloy blank ranges from 40 mm to 150 mm, and the length of the high-temperature alloy blank ranges from 300 mm to 5,000 mm; S2, the above high-temperature alloy blank is put in a heating furnace to be heated to range from 920 DEG C to 1,120 DEG C; S3, the heated high-temperature alloy blank is transferred into a guide chute of a skew rolling mill from the heating furnace, and the transfer time ranges from 5 s to 20 s; S4, feeding is carried out in the guide chute of the skew rolling mill, and the high-temperature alloy blank does screw motion in a deformation area till deformation is finished; and S5, the step S2, the step S3 and the step S4 are repeated. The method has the advantages that the penetration depth of the deformation area is large, and multi-pass rolling can be carried out in a reciprocating manner. Continuous and stable partial deformationis achieved, pressing-twisting composite three-dimensional severe deformation is achieved, and the ideal grain refining effect can be obtained.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and relates to a method for spiral rolling with conical rolls and equal roll spacing of large-size GH4169 high-temperature alloy overall ultra-fine-grained rods, in particular to an equidistant spiral rolling method for large-sized high-temperature alloy ultra-fine-grained rods rolling method. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/10
CPCC22F1/10
Inventor 庞玉华康荻娜何威威陈益哲罗远林鹏程
Owner 安徽东耘智能设备制造有限责任公司
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