Steel ring billet casting technique based on casting and rolling combined forming

Abstract

The invention discloses a steel ring billet casting technique based on casting and rolling combined forming. The steel ring billet casting technique based on casting and rolling combined forming comprises the steps that firstly, a casting mold is manufactured by means of water glass sand, the casting mold is dried and sprayed with painting, casting raw materials of a steel ring are smelted and are poured into the casting mold, and normalizing, tempering and quenching-tempering heat treatment are conducted on a steel ring billet formed through pouring; secondly, the steel ring billet is cooled to the room temperature, and polishing and machining are conducted on the cooled steel ring billet; finally, the steel ring billet which can be directly used for casting and rolling combined forming is obtained. According to the steel ring billet cast according to the technique, the defects, such as shrinkage cavities, shrinkage porosity and segregation, appearing in the steel ring billet casting process can be reduced, grains are refined to the maximum extent, and the high-quality steel ring billet capable of meeting the requirement for the ring rolling performance is manufactured; due to the fact that the processes of the casting and rolling combined forming technique are simplified, the quality and performance of the ring rolling technique and a ring workpiece are guaranteed.

Description

technical field [0001] The invention relates to a manufacturing process, in particular to a casting process of a steel ring billet used for ring casting and rolling composite molding, and belongs to the field of casting technology. Background technique [0002] Ring parts are typical transmission and load-bearing key mechanical parts in industrial fields such as equipment manufacturing. They have many varieties, large quantities, and wide uses. With the development of high-end machine tools, port machinery, chemical machinery, ships, wind power and major equipment, the demand for ring parts is increasing, the specifications are increasing, and the varieties are increasing. For example, my country's bearing production accounts for more than 1 / 3 of the world's output, and the demand for large bearings with large rings as the main parts is increasing; wind power, petrochemical, port machinery and defense industries require a large number of more than 2 m Even large or extra-lar...

AI Technical Summary

Problems solved by technology

This process is lengthy; billet cutting, forging, and punching are all thermal processing, which requires heating of the billet; billet cutting, sawing machine blanking, forging, and punching in steel mills all require large-scale equipment, which not only requires a large investment, but also consumes energy and power; The punching process and multiple heating cause material waste; there are problems such as large energy and power consumption, serious material waste, low efficiency, high cost, increased emissions and environmental pollution