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Equal-gap rolling method of helical conical rolls for large-size superalloy ultrafine-grained rods

A high-temperature alloy and large-size technology, applied in the direction of metal rolling, metal rolling, rolls, etc., can solve the problems of limited size and refinement, small deformation zone, poor penetration, etc., to achieve continuous and stable local deformation, The effect of small load and small rolling load

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

AI Technical Summary

Problems solved by technology

[0023] The object of the present invention is to provide a rolling method of helical conical rollers with equal roll spacing for large-scale high-temperature alloy ultrafine-grained rods, so as to solve the problems of small deformation zones and poor penetration in the above-mentioned background technology. Limited level of refinement, low efficiency, etc.

Method used

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  • Equal-gap rolling method of helical conical rolls for large-size superalloy ultrafine-grained rods
  • Equal-gap rolling method of helical conical rolls for large-size superalloy ultrafine-grained rods
  • Equal-gap rolling method of helical conical rolls for large-size superalloy ultrafine-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 GH4169 superalloy, the diameter D is 80mm, and the length is 300mm; the radius r of the biting arc of the spiral roll 1 is 135mm, the cone angle γ1 of the conical roll is 17°, and the rolling angle β is 17°. The advance angle α is 15°, the pitch of the spiral roll 1 is 8mm, the tooth height h is 9mm, the roll distance Dg is 85% of the billet diameter D, the ellipticity coefficient is 1.22, and the speed n of the roll 1 is 28r / min;

[0068] S2: heating the superalloy cylindrical billet to 950°C in a heating furnace, and the heating time is 60 minutes;

[0069] 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;

[0070] S4: The blank moves spirally in the deformation zone until the deformation ends.

[0071] S5: Repeat steps S2-S4, repeat ro...

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Abstract

The invention relates to an equal roller spacing rolling method for spiral conical rollers of a large dimension high-temperature alloy ultra-fine grain rod, belongs to the technical field of machining, and particularly relates to the equal roller spacing rolling method for spiral conical rollers of the large dimension high-temperature alloy ultra-fine grain rod. The method comprises the followingsteps: S1, selecting a high-temperature alloy blank, wherein the diameter dimension D is 40-150mm and the length is 300-5000mm; S2, putting the high-temperature alloy blank in a heating furnace to beheated to 900-1100 DEG C; S3, transferring the heated high-temperature alloy blank to a material guide slot of a skew rolling mill from the heating furnace; S4, feeding the material to the material guide slot of the skew rolling mill, and feeding the high-temperature alloy into a deformation region between the inlet and the outlet of the skew rolling mill, wherein the high-temperature alloy blankmoves spirally in the deformation region till deformation is finished; and S5, repeating the steps S2-S4, and spirally rolling the high-temperature alloy blank for 2-6 times to obtain the GH4169 high-temperature alloy integral ultra-fine grain rod. The preparation method provided by the invention has the beneficial effects that the penetration of the deformation region is deep and great, and multi-pass rolling can be carried out in a reciprocating manner; and an ideal grain refining effect can be obtained by means of continuous and stable local deformation and pressing-twisting compound three-dimensional severe deformation.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for rolling a large-size high-temperature alloy ultra-fine-grained bar with a helical conical roll and an equal roll distance. 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 ...

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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