Reversed cone spiral roller ultra-fine grain rolling method of large-sized titanium alloy bar

A titanium alloy, large-scale technology, used in metal rolling, metal rolling, rolls, etc., can solve the problems of high HPT forming load, aggravated deformation unevenness, and increased deformation speed difference between the core and edge of the billet, etc. Achieve the effect of improving the surface quality and deformation uniformity, reducing the degree of uneven radial deformation, and reducing the lateral deformation
CN109909296AActive Publication Date: 2019-06-21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
Applications(China)
Current Assignee / Owner
安徽东耘智能设备制造有限责任公司
Publication Date
2019-06-21

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Abstract

The invention relates to the field of machining, in particular to a reversed cone spiral roller ultra-fine grain rolling method of a large-sized titanium alloy bar. The reversed cone spiral roller ultra-fine grain rolling method of the large-sized titanium alloy bar comprises the following steps that of designing a rolling tool, wherein roller design and guide plate design are involved specifically, and each roller is arranged to be a hyperboloid circular-truncated-cone-like spiral roller; forming a deformation area, wherein the curved faces of the two guide plates are oppositely arranged, thetwo rollers are placed between the two guide plates, and the area defined by the two guide plates and the two rollers is the deformation area; forming a constant-ovality deformation area, wherein theovality in the deformation area is kept constant; and selecting a rolling feeding manner, wherein inverted feeding type rolling manner is adopted. By the adoption of the reversed cone spiral roller ultra-fine grain rolling method of the large-sized titanium alloy bar, by designing the hyperboloid circular-truncated-cone-like spiral rollers and the curved-face guide plates and forming the constant-ovality deformation area, severe plastic deformation can be generated on the premise of remarkably restraining the Mannesmann effect of the core portion.
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Description

technical field

[0001] The invention relates to the field of mechanical processing, in particular to an ultra-fine-grained rolling method of a large-size titanium alloy rod with reverse-cone helical rollers. 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 torsional extrusion (TE), among which:

[0004] (1) High-pressure torsional deformat...

Claims

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