Steel production process with forging-rolling combination

Abstract

The invention relates to a steel production process which is a steel production process with forging-rolling combination, and the process flow comprises: steel ingot or continuous casting blank heating, forging, reheating, rolling, cropping ends and sectioning, cooling, finishing, examination, marking, packaging and weighing, and warehousing; in the steel ingot or continuous casting blank heating procedure, the heating temperature is 1150 DEG C; in the forging procedure, the forging ratio is controlled to be 3, and the final forging temperature is 1000 DEG C; in the reheating procedure, when the final forging temperature is below 900 DEG C, reheating is needed, and the heating temperature is 1050 DEG C; in the rolling procedure, a two-roller reversible mill is adopted, and the desired shape and dimension are obtained through a square-elliptic-round hole pattern. The invention not only has the advantages of both forging technology and rolling technology, but also is high in production efficiency, high in rolling yield, high in size precision, low in consumption, dense in internal structure, high in mechanical properties, and excellent in metallographic structure.

Description

technical field [0001] The invention relates to a steel production process, in particular to a steel production process combining forging and rolling. Background technique [0002] The current round steel plastic forming processes mainly include forging, rolling, etc. These two processes are independent production processes. The production process of forging is: steel ingot / continuous casting billet→heating→forging→cooling→finishing→inspection→ Marking → packaging and weighing → storage. The forging production process is characterized by dense internal structure and high mechanical properties of the product, so many important shafts and other products require the use of forgings, but the production cycle of a single product in the forging production process is long and the dimensional accuracy is poor, so the cost of forgings is very high . [0003] The rolling production process is: steel ingot / continuous casting slab→heating→rolling→head and tail cutting / segmentation→coo...

AI Technical Summary

Problems solved by technology

The forging production process is characterized by dense internal structure and high mechanical properties of the product, so many important shafts and other products require the use of forgings, but the production cycle of a single product in the forging production process is long and the dimensional accuracy is poor, so the cost of forgings is very high

[0003] The rolling production process is: steel ingot / continuous casting slab→heating→rolling→head and tail cutting / segmentation→cooling→finishing→inspection→marking→packing and weighing→warehousing. The rolling production process is characterized by production High efficiency, high yield, high dimensional accuracy and low consumption, but the internal structure of the product in the rolling production process is not dense enough, and the mechanical properties are slightly poor, so the rolled piece can only be used on some equipment that requires ordinary equipment

[0004] The two production processes of forging and rolling have their own advantages, but they also have shortcomings. If they can be combined organically, the shortcomings of these two processes can be solved.