Compound extrusion preparation method of large-diameter high-quality tube blank or annular blank

Abstract

The invention relates to a compound extrusion preparation method of a large-diameter high-quality tube blank or an annular blank. The compound extrusion preparation method is mainly aimed at materials which are large in deformation resistance, narrow in heat processing temperature range, difficult in heat processing, and difficult to deform. The compound extrusion preparation method comprises the following steps: (1) a high-quality ingot blank with high purity is prepared through a vacuum melting process; (2) homogenization treatment is carried out alternatively, multi-pass pier drawing fast forging cogging-down is carried out, an organization is refined, and the homogeneity of the organization is improved; (3) hollow blank material is prefabricated in a punch mode; (4) isothermality / heat molding compound extrusion is carried out on the prefabricated hollow blank material, the tube blank with the uniform and thin organization is prepared; and (5) subsequent machining is carried out, and a finished tube (ring) and the high-quality ingot blank are obtained. The novel preparation method is used for preparing the large-diameter tube (ring) blank with the uniform and thin organization. The preparation method is labor-saving in shaping, energy-saving, high in material utilization rate, high in product quality, and capable of resolving the problems that a tube (ring) blank prepared through a traditional process is thick in organization, poor in uniformity, large in shaping force and the like.

Description

technical field

[0001] The invention relates to a preparation and processing method of a pipe (ring) billet, in particular to a method for preparing a composite extrusion of a large-diameter and high-quality pipe billet or ring billet, which belongs to the technical field of metal processing and is mainly aimed at narrow thermal processing temperature range and deformation Hard-to-deform materials such as nickel-based alloys, high-strength steels, titanium alloys, and zirconium alloys with high resistance and difficult thermal processing. Background technique

[0002] Difficult-to-deform materials such as nickel-based alloys, high-strength steels, titanium alloys, zirconium alloys, and tungsten alloys have excellent performance, and have excellent and unique performance. Therefore, they are widely used in many military technical fields such as aviation, aerospace, weapons, ships, and nuclear industries. Extensive, is the material basis of modern weapons and equipment. Howev...

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