Steel rolling method and steel obtained through method

A billet and finish rolling technology, applied in the field of rolling method and the steel obtained by using this method, can solve the problems of inability to balance low cost and high quality, achieve good cooling effect, reduce manufacturing cost, and reduce thickness

Active Publication Date: 2016-08-17
SUZHOU SUXIN SPECIAL STEEL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is that the non-tempered steel decarburization layer thickness control method in the prior art cannot take into account the technical problem of low cost and high quality, thereby providing a non-tempered steel that can reduce control costs and improve product quality. Rolling method for thickness of decarburized layer of quality steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a rolling method of steel, which adopts the method of comprehensively controlling the heating, rolling and cooling processes of non-quenched and tempered steel to realize the control of the thickness of the decarburized layer of non-quenched and tempered steel, specifically including the following steps:

[0029] Heating steps before rolling: place the billet in a heating furnace for heating, the temperature of the heating furnace in the preheating section is controlled at 900°C; the temperature of the heating furnace in the heating section is controlled at 1180°C; the temperature of the heating furnace in the soaking section is controlled at 1190°C °C; the overall heating time of the billet in the heating furnace is 3 hours;

[0030] Rolling steps: send the heated billet into the rolling mill, and carry out preliminary rolling, intermediate rolling and finishing rolling in sequence; the starting rolling temperature of the preliminary rolling is ...

Embodiment 2

[0037] This embodiment provides a rolling method of steel, which adopts the method of comprehensively controlling the heating, rolling and cooling processes of non-quenched and tempered steel to realize the control of the thickness of the decarburized layer of non-quenched and tempered steel, specifically including the following steps:

[0038] Heating steps before rolling: place the billet in a heating furnace for heating, the temperature of the heating furnace in the preheating section is controlled at 850°C; the temperature of the heating furnace in the heating section is controlled at 1120°C; the temperature of the heating furnace in the soaking section is controlled at 1130°C °C; the overall heating time of the billet in the heating furnace is 2.5 hours;

[0039] Rolling steps: send the heated slab into the rolling mill, and carry out initial rolling, intermediate rolling, and finishing rolling in sequence; the initial rolling temperature is controlled at 1100°C, the inter...

Embodiment 3

[0046]This embodiment provides a rolling method of steel, which adopts the method of comprehensively controlling the heating, rolling and cooling processes of non-quenched and tempered steel to realize the control of the thickness of the decarburized layer of non-quenched and tempered steel, specifically including the following steps:

[0047] Heating steps before rolling: place the billet in a heating furnace for heating, the temperature of the heating furnace in the preheating section is controlled at 860°C; the temperature of the heating furnace in the heating section is controlled at 1160°C; the temperature of the heating furnace in the soaking section is controlled at 1180°C °C; the overall heating time of the billet in the heating furnace is 3 hours;

[0048] Rolling steps: send the heated billet into the rolling mill, and carry out initial rolling, intermediate rolling, and finishing rolling in sequence; the initial rolling temperature is controlled at 1130°C, and the in...

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Abstract

The invention relates to a steel rolling method. The thickness of a steel decarburized layer is controlled by using the method of conducting comprehensive control over processes of steel heating, steel rolling and steel cooling. The steel rolling method comprises the specific steps that heating is conducted before rolling, rolling is conducted, and cooling is conducted after rolling. The thickness of the decarburized layer of non-quenched and tempered steel is decreased to be 300 micrometers or less through appropriate processes of heating conducted before rolling, rolling and cooling conducted after rolling, and the requirement for the thickness of the decarburized layer of the non-quenched and tempered steel is met, so that the decarburized layer of the steel can be removed without being subjected to barreling or skinning and other operations; and a steel blank is fully utilized, and the steel manufacturing cost is reduced.

Description

technical field [0001] The invention relates to a steel rolling method and the steel obtained by using the method, and belongs to the technical field of iron and steel metallurgy manufacturing. Background technique [0002] Non-quenched and tempered steel is a steel that does not require quenching and tempering treatments such as quenching and tempering. Since it does not need to undergo quenching and tempering treatments such as quenching and tempering, it can shorten the production cycle and save energy. Non-quenched and tempered steels are mainly divided into non-quenched and tempered steels for hot forging, non-quenched and tempered steels for direct cutting, non-quenched and tempered steels for cold work strengthening and high-toughness non-quenched and tempered steels. Non-quenched and tempered steel for hot forging and non-quenched and tempered steel for direct cutting are mainly used in related fields such as automobiles and machinery manufacturing, so higher require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/74B21B45/02
Inventor 徐益峰
Owner SUZHOU SUXIN SPECIAL STEEL
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