A method for ultra-fine grain rolling of large-size titanium alloy rods

A titanium alloy, ultra-fine grain technology, used in metal rolling, metal rolling, metal rolling stands, etc., can solve the problem of high HPT forming load, aggravated deformation unevenness, and deformation speed of the core and edge of the billet. It can improve the surface quality and deformation uniformity, reduce the probability of cracks, and reduce the lateral widening deformation.
CN109807175BActive Publication Date: 2020-05-15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
2020-05-15

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Abstract

The invention discloses an ultra-fine grain rolling method of a large titanium alloy bar and relates to the field of machining, in particular to the ultra-fine grain rolling method of the large titanium alloy bar. The ultra-fine grain rolling method of the large titanium alloy bar comprises the following steps that rolling tools are designed, roller design and guide plate design are included, eachroller is designed into a double-curved face type circular truncated cone roller, and specifically, a bus of each roller is formed by connecting two curves, and one face of each guide plate is designed into a curved face; a deformation zone is configured, wherein the curved faces of the two guide plates are oppositely arranged, the two rollers are arranged between the guide plates, and a regiondefined by the two guide plates and the two rollers is the deformation zone; an equal ovality deformation zone is configured, wherein ovality in the deformation zone is kept unchangeable; and a rolling feeding manner is selected, wherein a backward advancing rolling manner is adopted. According to the ultra-fine grain rolling method of the large titanium alloy bar, by designing the double-curved face type circular truncated cone rollers and the curved face-shaped guide plates and configuring the equal ovality deformation zone, intensive plastic deformation can be generated on the promise of remarkably restraining a Mannesmann effect of the heart.
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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 titanium 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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