High-carbon steel rod on-line aging high-speed production method

Abstract

A high-carbon steel rod on-line aging high-speed production method belongs to the technical field of high speed steel rolling, and the process includes the following steps: 3-5 water tanks are adopted for water cooling after finish rolling, wherein the cooling temperature of each water tank is controlled to be 20-25 DEG C, and the spinning temperature is controlled to be 900-910 DEG C; the cooling rate for steel rods after spinning is controlled to be 11.5-12 DEG C / s; the temperature for the rods entering a heat insulating cover is 550-570 DEG C, and the rate of a roller bed inside the heat insulating cover is controlled to be 0.3-0.4 m / s; the length of the heat insulating cover is 32-35 m, and the holding time of the heat insulating cover is controlled to be 80-100 s. The high-carbon steel rod on-line aging high-speed production method has the advantages that based on all factors influencing the aging of high-carbon steel rods, the primary cause influencing the aging is analyzed; the thermal stress of the water cooling process is reduced, so that the holding time of the heat insulating cover is controlled and prolonged, the optimal temperature interval is controlled, and stabilization and maximum separation of C, N and other interstitial atoms are realized, and structural stress is eliminated, therefore, the on-line aging of high-carbon steel rods is truly realized.

Description

technical field [0001] The invention belongs to the technical field of high-strength steel rolling, and in particular provides an on-line aging high-strength production method for high-carbon steel wire rods, which greatly reduces the aging period of wire rods, improves the factory surface shrinkage of wire rods, and shortens the user's time limit. The service life is suitable for the development of high carbon steel wire rod in high wire workshop. Background technique [0002] The aging performance of high-carbon steel wire rods has always been an indicator that high-end wire factories and deep-processing users pay attention to. The types of high-carbon steel involved include prestressed wire rods, spring steel, cord steel, bearings, etc. In order to ensure the use of deep processing, Wire rods need to be aged for 3-5 days before leaving the factory, and users need to be aged for more than one week before they can be used after deep processing. During this process, the high...

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Problems solved by technology

Regarding the research on the timeliness of high-carbon steel wire rods, various steel mills have related reports. The main reason for the timeliness performance of wire rods analyzed by Shougang in the early stage is the stress of the wire rods. But the effect is not very good. In the later stage, the gas content of the wire rod is reduced by reducing the N content of the raw and auxiliary materials for smelting and controlling the increase of N during the continuous casting process. However, the raw material requirements for steelmaking, continuous casting nozzle protection casting, tundish protection, and production costs all bring pressure

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