Production process verification method of low-temperature steel flange

Abstract

The invention relates to a production process verification method of a low-temperature steel flange. The method comprises the procedures of material preparation, billet heating, forging, heat treatment, machining and quality detection. The forging procedure comprises the following two parts: (1) upsetting and punching, and (2) forging forming. Upsetting means that forging is carried out in the axial direction of the workpiece, the length of the workpiece is reduced, and the cross section area of the workpiece is increased. Punching means that a through hole or a blind hole is punched in the workpiece through a punch. The forging forming process comprises the following steps: (1) billet heating; (2) fast forging and first fire forging; (3) heating of an intermediate billet; (4) fast forgingand intermediate fire forging; (5) heating of the intermediate billet; (6) fast forging and final fire forging; (7) fast forging billet heating; and (8) forging of a radial forging machine. By optimizing the forming process of the forging process of the low-temperature steel flange, the quality of a low-temperature steel flange casting is improved, the quality of the forged piece is detected, thequality of the forged piece is guaranteed, and therefore the effectiveness and practicability of process forming parameters of the forged piece are verified, and the quality requirement for the low-temperature large flange forged piece is met.

Description

technical field [0001] The invention belongs to the technical field of industrial production and relates to a method for verifying the production process of a low-temperature steel flange. Background technique [0002] Low temperature steel flange, also known as flange flange or flange. Flange is a part that is connected to each other between pipes, and is used for the connection between pipe ends; it is also useful for flanges on the inlet and outlet of equipment. The connection between two devices, such as reducer flange, flange connection or flange joint, refers to the detachable connection of flanges, gaskets and bolts as a combined sealing structure. Pipe flange refers to the flange used for piping in the pipeline installation, And used on the equipment refers to the inlet and outlet flange of the equipment. [0003] Cryogenic steel is a low-alloy steel for high-performance low-temperature pressure vessels. With the continuous improvement of design standards for low-te...

AI Technical Summary

Problems solved by technology

When the low-temperature steel flange in the prior art is welded to the steel pipe port, the contact surface between the flange and the steel pipe is small, and the welding point is only a circle around the flange, making the connection with the steel pipe unreliable and easy to loosen, and The two flanges are only connected by bolts. Although the connection is firm, the tightness between the two flanges is low, and it is easy to leak the liquid in the pipeline during application.

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