Steel rolling method for producing bearing steel based on pusher-type heating furnace

Abstract

The invention discloses a steel rolling method for producing bearing steel based on a pusher-type heating furnace. The steel rolling method comprises the following steps: adjusting temperature of each section of the pusher-type heating furnace, wherein the furnace temperature of a preheating section of the pusher-type heating furnace is controlled to be between 800 and 850 DEG C through a nozzle, the furnace temperature of a heating section II is controlled to be between 1050 and 1180 DEG C, the furnace temperature of a heating section I is controlled to be between 1210 and 1260 DEG C, and the furnace temperature of a soaking zone is controlled to be between 1210 and 1260 DEG C; spraying high-temperature protective coatings on side faces of the billet, and flatly pushing the billet into the pusher-type heating furnace for heating, wherein the accumulated heating time of the billet in the heating section I and the soaking zone is controlled to be not less than an hour, and the total heating time in the furnace is controlled to be not less than 3 hours; rolling the billet heated by the pusher-type heating furnace in a rolling mill. According to the steel rolling method, the heating temperature is raised to the greatest degree under the conditions that carbide liquation is qualified and over-burning or adhesion on steel is avoided, and the temperature preservation time is shortened.

Description

technical field [0001] The invention relates to the technical field of steel rolling control, in particular to a steel rolling method for producing bearing steel based on a pusher type heating furnace. Background technique [0002] The carbon content of high carbon chromium bearing steel GCr15 is generally around 1.0%. Carbon is an element that is easy to segregate. During the solidification process of steelmaking and continuous casting, the slab can easily form ledeburite eutectic carbide due to the segregation of carbon. Dissolution and diffusion will eventually cause the steel to exceed the standard due to carbide liquidation, resulting in unqualified performance. Therefore, GCr15 is required to have a higher heating temperature and a longer heating time during the rolling process to reduce carbide liquidation. [0003] However, when the high-carbon chromium bearing steel is heated by a pusher-type heating furnace, when the heating temperature is too high, steel billets...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a steel rolling method for producing bearing steel based on a pusher-type heating furnace, aiming at solving the problem of excessive carbide liquidation and avoiding steel sticking

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