Retaining ring short-flow manufacturing process

Abstract

The invention relates to a retaining ring short-flow manufacture technology, and belongs to the electroslag technology field. <{EN2}>The method comprises the steps of A) electroslag hollow steel pipe, namely employing electroslag continuous casting mobile core rod production principle, i.e. consumable electrode for continuously uniform fusing, so that a slag surface rises continuously to start an ingot device after reaching a predetermined height, so as to tract the hollow steel ingot move downwards slowly; the tract speed is in direct proportion with the consumable electrode fusing speed, and the two speeds are balanced; after melting, the steel ingot and the core rod are lifted; the core rod is taken out and the hollow steel pipe retaining ring is completed; B) pulling; C) solid melting; D) mechanical processing, namely processing the internal and external surface of a blank and two transverse planes until ho black dots appear; E) cold expansion, namely deforming the retaining ring by means of hydraulic pressure by using a water press over 8000ton through a special die to obtain a retaining ring that has a high strength that is larger than or equal to 1000 Mpa; F) tempering, namely employing insulating the retaining ring between 35- DEG C and 400 DEG C for a long time after cold expansion to eliminate the deformation pressure.

Description

technical field [0001] The invention relates to a short-flow manufacturing process for a retaining ring, which belongs to the technical field of electroslag technology. Background technique [0002] The traditional manufacturing process of the retaining ring is to use electroslag remelted solid steel ingots as raw materials, after heating and upsetting, punch holes with large-scale forging equipment, and forge the blank of the retaining ring through multiple processes of repeated forging, elongation, and hole expansion. Its disadvantages are as follows: [0003] The material utilization rate is low, generally around 30%. [0004] There are many forging processes and the cycle is long, usually through six forging processes, and the processing cost is high. [0005] The pass rate is low. Since the retaining ring steel has high deformation resistance and strong crack sensitivity, cracks are prone to occur on the surface of each forging process. It is necessary to remove the s...

AI Technical Summary

Problems solved by technology

[0003] The material utilization rate is low, generally around 30%

[0004] There are many forging processes and a long period, usually through six forging processes, and the processing cost is high

[0005] The qualified rate is low. Since the retaining ring steel has high deformation resistance and strong crack sensitivity, cracks are easy to occur on the surface of each forging process. It is necessary to remove the surface cracks before entering a forging process. If the cracks are not cleaned, the product is easily scrapped.

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