A kind of ultra-fine grain rolling method of large-size aluminum alloy bar

An aluminum alloy, ultra-fine grain technology, applied in the direction of metal rolling, metal rolling, rolls, etc., can solve the problems of small geometric size of ultra-fine grain aluminum alloy, large forming load, inability to promote aerospace, etc., to improve the surface The effect of quality and deformation uniformity, reduction of lateral widening deformation, and reduction of repeated rolling times
CN109909295BActive 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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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
安徽东耘智能设备制造有限责任公司
Publication Date
2020-06-02

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Abstract

The invention relates to an ultra-fine grain rolling method for large-sized aluminum alloy rods, relates to the field of machining, and particularly relates to the ultra-fine grain rolling method forthe large-sized aluminum alloy rods. The ultra-fine grain rolling method for the large-sized aluminum alloy rods comprises the following steps of designing rolling tools: designing rollers and guidingplates, arranging the rollers to be double-curved-surface truncated-cone-shaped rollers, and arranging one surfaces of the guiding plates to be curved surfaces, wherein a busbar of each roller is formed by connected two curves; constructing a deformation zone: oppositely placing the curved surfaces of the two guiding plates, and placing the two rollers between the guiding plates, wherein a zone enclosed by the two guiding plates and the rollers is the deformation zone; and constructing an equal-ellipticity deformation zone: remaining the ellipticity in the deformation zone unchanged. According to the ultra-fine grain rolling method for the large-sized aluminum alloy rods provided by the invention, through designing the double-curved-surface truncated-cone-shaped rollers and the curved-surface-shaped guiding plates, and constructing the equal-ellipticity deformation zone, severe plastic deformation can be produced on the premise of remarkably inhibiting a heart Mannesmann effect.
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Description

technical field

[0001] The invention relates to the field of mechanical processing, in particular to an ultrafine-grain rolling method for large-size aluminum alloy rods. Background technique

[0002] Ultrafine crystal / nanocrystalline materials and their preparation technology are one of the research hotspots in the field of material science. Research in this direction embodies people's efforts to continuously improve the strength and toughness of polycrystalline materials through continuous refinement of grains. Among them, the research results of severe plastic deformation (Severe Plastic Deformation, referred to as SPD) technology are eye-catching.

[0003] At present, the mainstream SPD process includes five methods: high pressure torsion (HPT), equal channel angular extrusion (ECAP), cumulative stack rolling (ARB), multidirectional forging (MF) and torsion extrusion (TE), among which:

[0004] (1) High-pressure torsional deformation: While loading a pressure of severa...

Claims

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