Semisolid manufacturing process of opposite roller spinning strain induction method of submarine ring rib cylindrical shell

Abstract

Provided is a semisolid manufacturing process of an opposite roller spinning strain induction method of a submarine ring rib cylindrical shell. The process comprises the steps that firstly, on the basis of alloy smelting, an as-cast shell of the submarine ring rib cylindrical shell is manufactured through a centrifugal casting process; secondly, high-degree plastic deformation and shaping are carried out on the as-cast shell through an opposite roller spinning deformation process; thirdly, re-melting is carried out on an obtained distorted blank of the submarine ring rib cylindrical shell to obtain a semisolid blank, of a fine, uniform and spherical micro structure, of the submarine ring rib cylindrical shell; fourthly, integrated semisolid die forging forming is carried out on the semisolid blank; fifthly, heat treatment after forging is carried out to complete manufacturing of the submarine ring rib cylindrical shell. By means of the process, the submarine ring rib cylindrical shell of the non-dendrite fine, uniform and spherical micro structure can be obtained. The process has the advantages of being simple and high in material utilization rate and guaranteeing that the product is good in mechanical performance.

Description

technical field [0001] The invention belongs to the technical field of semi-solid processing and forming, and in particular relates to a semi-solid manufacturing process of a ring-ribbed cylindrical shell of a submarine by a wheel-spinning strain induction method. Background technique [0002] With the rapid expansion of the population on the earth, the supply of land resources has reached its limit. The ocean, which occupies 71% of the earth's surface area, contains rich strategic resources for human survival. The second physical space of development. Therefore, all countries have shifted the focus of economic development to the ocean, and the 21st century will be the century of the ocean. [0003] With the increasing status of the sea, the research and manufacture of underwater vehicles will receive more attention. From the military point of view, submarines, as the main combat force of our navy, are a major deterrent force at sea; from the civilian point of view, Submer...

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Problems solved by technology

However, this method has serious material loss, long processing time, and the metal streamline at the rib part is cut, the strength of the shell is reduced, and the mechanical properties are deteriorated, which is difficult to meet the high-quality requirements of the submarine ring-ribbed cylindrical shell; (2) Casting , although the material utilization rate is improved by using this method, due to the coarse grain size in the casting state, the uneven distribution of the structure, and the influence of defects such as shrinkage porosity and pores, the qualified rate of the parts is very low. The most important thing is that sometimes The casting material has low mechanical properties and cannot meet the design requirements of the workpiece; (3) Welding and forming, usually first welded by special steel plates into a circular steel cylinder (or extruded into a cylinder) and then butted, and then welded on the inner wall of the ring rib , this method is simple and low cost, but the produced cylinder has large welding deformation, low weld strength (only 60% of the base), poor plasticity and impact toughness, large welding deformation, easy to produce stress concentration, and poor alignment , cannot meet the high-precision requirements of the product, and the mechanical properties cannot meet the use requirements

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