Method for producing low-carbon steel or low-alloy steel plate having submicron crystal grain

A low-alloy steel and manufacturing method technology, applied in the field of low-carbon steel or low-alloy steel plate manufacturing, can solve problems such as plastic instability, low uniform tensile elongation, complex manufacturing process, etc., and achieve a relaxed microstructure. requirements, good microstructure stability, and the effect of small grain growth tendency
CN1566376AActive Publication Date: 2005-01-19BAOSHAN IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Publication Date
2005-01-19

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Abstract

The invention discloses a method for producing low-carbon steel or low-alloy steel plate having submicron crystal grain which comprises the steps of, subjecting the raw steel billets to austenizing treatment above Ac3 temperature, hot-rolling at the temperature of over Ar3, fast cooling after rolling, performing warm-rolling or cold rolling at the temperature range from 600 deg. C. to room temperature, direct cooling or roll bending after rolling.
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Description

technical field

[0001] The invention relates to a method for manufacturing low-carbon steel or low-alloy steel plate, in particular to low-carbon steel or low-alloy steel with submicron grains (that is, grain diameters within the range of 1.0 μm to 0.1 μm). Background technique

[0002] Low carbon steel and low alloy steel are the most widely used steel grades in the application field of steel materials. In order to improve the strength of steel, it is common practice to add alloying elements such as Mn and Si or perform controlled rolling, controlled cooling, heat treatment, etc., or add microalloying elements such as Nb and V. However, for steel, it is not only required to have high strength, high toughness and other good comprehensive properties, but also to consider resource conservation (less alloy elements) and sustainable use (easy to recycle). Grain refinement is one of the few effective means. However, most of the existing manufacturing methods for industrialized ...

Claims

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