Semi-solid Manufacturing Process of Die Ring Spinning Strain Induced Method for Submarine Ribbed Cylindrical Shell

Abstract

A semisolid manufacturing technology for a mold ring spinning strain inducing method for a submarine ring rib cylindrical shell includes the steps that on the basis of smelting alloy, a centrifugal casting technology is adopted for manufacturing an as-cast shell body of the submarine ring rib cylindrical shell; a mold ring spinning deformation technology is adopted to carry out large-deformation plastic deformation and shape-correction treatment on the as-cast shell body; an obtained distortion blank of the submarine ring rib cylindrical shell is remelted to obtain a semisolid blank, with a fine, even and spherical micro structure, of the submarine ring rib cylindrical shell; semisolid overall stamp forging and shape-correction are carried out on the semisolid blank; heat treatment after forging is performed to complete manufacturing the submarine ring rib cylindrical shell. The submarine ring rib cylindrical shell with the non-dendritic crystal fine and even spherical micro structure can be manufactured, and the semisolid manufacturing technology has the advantages that the technological process is simple, the material use ratio is large, and the mechanical property of the cylindrical shell is high.

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 die ring spinning strain induction method of a submarine ring-ribbed cylindrical shell. 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 sea. Therefore, the research and manufacture of underwater vehicles will receive higher attention. From the military point of view, submarines, as the main combat force of our navy, are a major force at sea. Deterrent force; from the civilian side, submersibles are also widely used in scientific research, engineering and other fields. [0003] Wheth...

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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 requirements for use; (4) The die ring spinning process, due to the severe plastic deformation of the material, a large amount of residual stress remains inside, so the ring rib cylinder formed by this process The shell must be annealed at high temperature to eliminate most of the residual stress

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