Casting and rolling continuous forming technological process for 42CrMo steel ring piece

Abstract

The invention discloses a technological process for continuous forming of 42CrMo steel casting and rolling, which belongs to the technical field of batch production of medium and small ring parts. The feature is that the technological process is alloy melting → molten steel refining → centrifugal casting ring billet → hot rolling → heat treatment → finishing, the molten steel refining is smelted by alkaline electric arc furnace oxidation method, and the smelting temperature is 1680 ° C ~ 1700 ° C; Centrifugal ring billet casting refers to the centrifugal casting of refined molten steel into a ring billet. The pouring temperature is 1550°C~1560°C. After the pouring is completed, the mold is released at 1200°C~1250°C. It is transferred to radial-axial rolling through the conveying system. On the machine, the waste heat of the cast slab is directly rolled and expanded at 1050°C. The advantage is that the utilization rate of materials is improved, the technological process is shortened, the production cost is reduced, the quality and precision of ring parts are improved, energy and human resources are saved, and 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.