A production method to solve the problem of martensite in the core of high carbon steel

Abstract

The invention discloses a production method capable of solving the problem of core martensite of high-carbon steel, and belongs to the technical field of high-carbon steel. The production method comprises the steps of converter smelting, ladle deoxidization and alloying and LF (ladle furnace) ladle refining. The following technical parameters are controlled in the process: maximally 95 percent of chromium alloy components are batched before entering a converter, and the other part is supplemented in an LF; the flow in skull breaking and argon pre-blowing stages of the LF is controlled to be 420-450Nl / min; the argon flow in an alloy regulation stage is controlled to be 470-500Nl / min; the argon flow in an argon soft-blowing stage is controlled to be 75-85Nl / min, and the time is controlled to be 10 to 15 minutes. The method has the advantage that the problem of high occurrence rate of the core martensite of the high-carbon steel and especially high-carbon steel containing certain high-permeability alloy components such as Cr and Mn is solved.

Description

technical field [0001] The invention belongs to the technical field of high-carbon steel, and in particular provides a production method for solving the problem of martensite in the core of high-carbon steel. It is suitable for high-carbon wire rod produced by "converter (electric furnace) smelting → high-wire rolling and controlled cooling". Background technique [0002] High-carbon wire rods such as SWRH82B, bearing steel, and spring steel are all deep-processing materials, and their common feature is that they all contain a certain amount of strong permeability elements such as Cr or Mn, especially SWRH82B steel, whose composition is designed at 80 # Adding an appropriate amount of Cr and Mn alloys on the basis of steel can improve the tensile strength and permeability. At present, the design components of various factories at home and abroad are slightly different, but they are generally in the following range: Cr: 0.1-0.4%, Mn : 0.7~0.9%. [0003] SWRH82B steel is a m...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a production method to solve the problem of martensite in the core of high-carbon steel. By strengthening the addition of alloys in the converter smelting and refining process, it solves the problem of strong permeability of high-carbon steel, especially containing certain Cr, Mn, etc. The core of high carbon steel with alloying elements is prone to martensite problems

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