Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for producing q550d steel plate with low energy consumption

A low energy consumption, steel plate technology, applied in the field of material processing, can solve the problems of high energy consumption for slab heating, environmental pollution, and increased manufacturing costs, and achieve the effects of reducing heating energy consumption, production costs, and good mechanical properties.

Active Publication Date: 2018-07-27
INNER MONGOLIA UNIV OF SCI & TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for producing Q550D steel plates with low energy consumption, which solves the problems of stacking and slow cooling during the production of Q550D steel types, resulting in high energy consumption for heating slabs, increased manufacturing costs, and greater environmental pollution.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for producing q550d steel plate with low energy consumption
  • A method for producing q550d steel plate with low energy consumption
  • A method for producing q550d steel plate with low energy consumption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The method for producing Q550D steel plate with low energy consumption provided by Embodiment 1 of the present invention, the thickness of the required finished product Q550D steel plate is 12mm, comprising the following steps:

[0022] Step 1: Cut off the cast slab with a thickness of 230mm and directly put it into a heating furnace for reheating, wherein, the mass percentages of the components in the continuous casting slab are: C: 0.07%, Si: 0.35%, Mn: 1.75%, Nb: 0.03%, V: 0.05%, P: 0.02%, S: 0.005%, Als: 0.022%, Ca: 0.0015%, Ti: 0.01%, B: 0.0012%, and the balance is iron and Unavoidable impurities, when put into the heating furnace, the surface temperature of the continuous casting slab is 710°C, the heating temperature in the heating furnace is 1190°C, and the heating time is 140min.

[0023] Step 2: Carry out controlled rolling of the heated continuous casting slab. The thickness of the initial rolling in the first stage is 230 mm in thickness of the continuous ca...

Embodiment 2

[0032] The method for producing Q550D steel plate with low energy consumption provided by Embodiment 2 of the present invention requires the thickness of the finished product Q550D steel plate to be 20 mm, comprising the following steps:

[0033] Step 1: Cut off the cast slab with a thickness of 230mm and directly put it into a heating furnace for reheating, wherein, the mass percentages of the components in the continuous casting slab are: C: 0.09%, Si: 0.45%, Mn: 1.65%, Nb: 0.04%, V: 0.03%, P: 0.018%, S: 0.003%, Als: 0.034%, Ca: 0.003%, Ti: 0.02%, B: 0.002%, and the balance is iron and Unavoidable impurities, when put into the heating furnace, the surface temperature of the continuous casting slab is 711°C, the heating temperature in the heating furnace is 1220°C, and the heating time is 210min.

[0034] Step 2: Carry out controlled rolling of the heated continuous casting slab. The thickness of the initial rolling in the first stage is 230mm, the temperature of the initial ...

Embodiment 3

[0043] The method for producing Q550D steel plate with low energy consumption provided by Embodiment 3 of the present invention, the thickness of the required finished product Q550D steel plate is 30mm, comprising the following steps:

[0044] Step 1: Cut off the cast slab with a thickness of 230mm and directly put it into a heating furnace for reheating, wherein, the mass percentages of the components in the continuous casting slab are: C: 0.085%, Si: 0.41%, Mn: 1.68%, Nb: 0.035%, V: 0.033%, P: 0.014%, S: 0.004%, Als: 0.0341%, Ca: 0.0028%, Ti: 0.014%, B: 0.0012%, and the balance is iron and Unavoidable impurities, when put into the heating furnace, the surface temperature of the continuous casting slab is 705°C, the heating temperature in the heating furnace is 1210°C, and the heating time is 202min.

[0045]Step 2: Carry out controlled rolling of the heated continuous casting slab. The thickness of the first-stage initial rolling is 230mm, the first-stage initial rolling tem...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
yield strengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for producing Q550D steel plates with low energy consumption, and relates to the field of material machining. The method includes the steps that a cast continuous casting billet is cut and then directly put into a heating furnace to be heated again, the heated continuous casting billet is subjected to controlled rolling, and the rolling speed in the first stage is 1.2 m / s; second-stage rolling is conducted after first-stage rolling, cooling is conducted after second-stage rolling, and the finished product Q550D steel plates are obtained after cooled rolled steel plates are subjected to tempering. The operation method is simple, feasible, and convenient to popularize. By optimizing the heating and rolling processes, stacking and slow cooling of the cast continuous casting billet are not needed, the cast continuous casting billet is directly put into the heating furnace, the surface temperature of the cast continuous casting billet in the furnace reaches 705 DEG C or above, heating energy consumption is greatly lowered, the production procedures are simplified, and the production cost is lowered.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a method for producing Q550D steel plates with low energy consumption. Background technique [0002] Q550D is a high-strength structural steel with a yield strength of 550MPa. In addition to high strength requirements, this steel requires good impact toughness and weldability, and good surface quality. [0003] In order to ensure that the strength of Q550D meets the requirements, more Nb, Cr and other alloys are added to the composition design of this steel. When the temperature of the slab surface entering the furnace is high, cracks are prone to appear on the surface of the steel plate, and such cracks are large in size and cannot be ground; at the same time, when the temperature of the slab entering the furnace is high, the strength decreases and the impact energy is unstable Therefore, in the production of Q550D steel, generally after the slab is cast, it is cut off and st...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/02C22C38/04C22C38/02C22C38/12C22C38/06C22C38/14
CPCC21D8/0226C21D8/0247C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/32
Inventor 许剑轶胡锋李海刚王瑞芬李霞张国芳王青春樊文军
Owner INNER MONGOLIA UNIV OF SCI & TECH