Cutting method of large riser sprue runner for large high-temperature alloy casting

Abstract

The invention provides a cutting method of a large riser sprue runner for a large high-temperature alloy casting. By adopting a high-temperature alloy designation welding rod, pollution of impurity elements is avoided, and the utilization ratio of remaining materials after cutting is raised. Through blowing-in of argon, alloy liquid in the cutting process is cleaned timely and is prevented from being accumulated and solidified at a cutting part, and the cutting efficiency is improved; oxides are prevented from being produced and recovery of the remaining materials is facilitated; and the cutting part is cooled timely, so that a large heat-affected zone is prevented from being formed, and the casting quality is ensured. Through the measures above, the problem that a large high-temperature alloy mould is subjected to casting deformation is solved effectively.

Description

technical field [0001] The invention belongs to the field of high-temperature alloy precision casting, and in particular relates to a cutting method for a large riser runner of a large-scale high-temperature alloy casting. technical background [0002] In recent years, with the development of the aviation industry, the isothermal forging process has become an essential process for the preparation of powdered turbine disks and titanium alloy deformed parts. In the process of isothermal forging powder superalloy, the preparation of mold is very important. As the size of mold castings is getting larger and larger, the size of the riser is also getting larger and larger. Manufacturers use cutting machines to cut, but this also brings some problems. On the one hand, the size of parts and risers is very large, and some risers have a diameter greater than 500mm, and the shape of the parts is irregular, and it is inconvenient to install the clamp to the cutting machine. At the same...

AI Technical Summary

Problems solved by technology

On the one hand, the size of parts and risers is very large, and some risers have a diameter greater than 500mm, and the shape of the parts is irregular, and it is inconvenient to install the clamp to the cutting machine. At the same time, the radius of the corresponding saw blade is required to be larger than the radius of the riser. Sometimes There are no saw blades with corresponding specifications on the market, which brings the problem of inability to cut; in addition, the superalloy material itself is relatively hard, and cutting is difficult. During the operation, the vibration of the cutting machine is relatively large, and the cut riser is rotating at a high speed. There is a danger of flying out of the saw blade and hurting people

[0003] Using the wire cutting method, the clamping and operation of the parts also bring difficulties, and at the same time the cutting time is long, and the corresponding cutting cost will also increase; using the oxygen-acetylene flame cutting, this method leads to a large heat-affected zone of the cutting part, and the There are micro-cracks at the root of the mouth, which cannot be cut for large-sized risers

At the same time, due to the serious oxidation of the high-temperature alloy in the high-temperature molten state, the severe oxidation of the cutting part and the cut material will affect the recovery of the cut material, resulting in an increase in production costs; cutting by gouging, there will be carburization in the riser after cutting The phenomenon that affects the recovery of materials

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