Process Flow of Continuous Forming of 42crmo Steel Ring by Casting and Rolling

Abstract

The invention discloses a technological process for performing a continuous casting-rolling formation on 42CrMo steel ring piece, and belongs to the technical field of batch production of medium-small scale ring pieces. The technological process is characterized by comprising the following steps of: alloy melting, refining of steel liquid, centrifugal casting of ring blanks, hot rolling, heat treatment and refining, wherein the step of refining of steel liquid is to melt the steel liquid in a basic electric arc furnace at 1680-1700 DEG C; and the step of centrifugal casting of ring blanks is to perform centrifugal pouring on the refined steel water to form ring blanks at 1550-1560 DEG C, demould the ring blanks at 1200-1250 DEG C after the pouring is finished, convey the ring blanks to a radial-axial rolling machine by a conveying system and directly roll and form the ring blanks at 1050 DEG C by utilizing blank casting afterheat. The process has the advantages that the utilization ratio of the material is improved, the technological process is shortened, the production cost is reduced, the quality and the accuracy of the ring piece are improved, the energy source and manpower resources are saved, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of ring production, and in particular relates to a process flow for continuous forming of a 42CrMo steel ring by casting and rolling. Background technique [0002] With the rapid development of high-tech fields such as shipbuilding, chemical equipment, aerospace and energy, the demand for high-quality and high-precision bearings is becoming more and more extensive. Ring rolling technology is an efficient and advanced manufacturing technology for producing bearing rings also developed rapidly. The traditional ring forming process is smelting—manufacturing steel billet—heating to manufacture forging billet—punching—rolling and expanding, and then machining. This forming process is not only lengthy and wastes materials, but also has serious energy waste after several times of heating. , It is not conducive to the current national implementation of industrial emission reduction and low-carbon goals, and the pro...

AI Technical Summary

Problems solved by technology

The traditional ring forming process is smelting—manufacturing steel billet—heating to manufacture forging billet—punching—rolling and expanding, and then machining. This forming process is not only lengthy and wastes materials, but also has serious energy waste after several times of heating. , which is not conducive to the current national implementation of industrial emission reduction and low-carbon goals, and the production efficiency is low. It is especially not suitable for mass production of small and medium-sized ring parts, and the increase in scale of ring parts caused by repeated heating also affects the quality of formed parts.