A method for ultra-fine grain rolling of large-scale superalloy rods

A high-temperature alloy and ultra-fine grain technology, applied in metal rolling, metal rolling, rolling, etc., can solve the problems of high forming load, small deformation, and lack of loading capacity of HPT, so as to improve surface quality and deformation uniformity , reduce the probability of cracks, and strengthen the effect of grain refinement
CN109772890BActive Publication Date: 2020-01-31重庆两航金属材料有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
重庆两航金属材料有限公司
Publication Date
2020-01-31

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Abstract

The present invention relates to the field of mechanical processing, in particular to an ultra-fine-grained rolling method for large-sized high-temperature alloy rods, comprising the following steps: rolling tool design, specifically including roll design and guide plate design, and setting the roll as a hyperboloid-like circle The table-shaped roll is specifically: the generatrix of the roll is formed by connecting two curves; one side of the guide plate is set as a curved surface; the structural deformation zone: the curved surfaces of the two guide plates are placed opposite each other, and the two rolls are placed between the guide plates. The area surrounded by two guide plates and two rolls is a deformation zone; the deformation zone with equal ellipticity of structure: the ellipticity in the deformation zone remains unchanged; the rolling feeding method is selected: the pouring rolling mode; the invention provides a An ultra-fine-grained rolling method for large-size superalloy rods, through the design of hyperboloid truncated cone-shaped rolls and curved guide plates, and the construction of equal ellipticity deformation zones, can be produced under the premise of significantly suppressing the Mannesmann effect in the core. severe plastic deformation.
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Description

technical field

[0001] The invention relates to the field of mechanical processing, in particular to an ultra-fine-grain rolling method for large-size high-temperature 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 torsional extrusion (TE), among which:

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

Claims

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