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

A two-pass combined smoothing process for high-strength steel coils

A high-strength steel and flattening technology, applied in the direction of contour control, etc., can solve the problems of inability to make timely process adjustments, lack of flattening effects, and difficult control of hot-rolled coils, so as to enhance market competitiveness and improve customer satisfaction , The effect of reducing the frequency of online detection of plate shape

Active Publication Date: 2016-05-25
SHANXI TAIGANG STAINLESS STEEL CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the limitation of high alloy content and controlled rolling and controlled cooling technology, the shape of hot-rolled coils is difficult to control. In order to obtain ideal shape quality, the flattening process must be carried out before flattening to improve the flatness. However, the traditional flattening process In the system, a larger tension is used to improve the leveling effect, a smaller pressure ensures the rolling stability, and a higher speed improves the working efficiency. This process system is suitable for medium and low strength steel types. For high strength steel, due to its high strength, plate The required leveling tension and pressure are relatively high, but in the actual operation process, if the tension is too large, the plate shape defect cannot be found, and the process adjustment cannot be made in time, and the due effect cannot be achieved if the tension is small. Flat effect, it is difficult to find a suitable tension and pressure range to meet the process requirements

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 two-pass combined smoothing process for high-strength steel coils
  • A two-pass combined smoothing process for high-strength steel coils
  • A two-pass combined smoothing process for high-strength steel coils

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The invention is mainly applied to the leveling of high-strength hot-rolled coils (thickness ≤ 6.0mm) for TQ460—TQ960 series engineering machinery, ensuring the longitudinal unevenness of the final steel plate.

[0028] Take this type of steel as an example: Steel quality: TQ700MCD Specification: 5*1500mm (the strength of this steel type is ≥700Mpa, the thickness is 5.0mm, and the width is 1500mm)

[0029] When producing the following types of steel coils in the leveling process, the leveling process parameters used are as follows:

[0030]

[0031] The final shape quality of the steel plate produced by the method is good, which reduces the quality objection loss and ensures the straightness of the online steel plate.

Embodiment 2

[0033] Take this type of steel as an example: Steel quality: TQ460MCD Specification: 3*1200mm (the strength of this steel type is ≥ 460Mpa, the thickness is 3.0mm, and the width is 1200mm)

[0034] When producing the following types of steel coils in the leveling process, the leveling process parameters used are as follows:

[0035]

[0036] The final shape quality of the steel plate produced by the method is good, which reduces the quality objection loss and ensures the straightness of the online steel plate.

Embodiment 3

[0038] Take this type of steel as an example: Steel quality: TQ960 Specification: 3*1000mm (the strength of this steel type is ≥ 960Mpa, the thickness is 3.0mm, and the width is 1000mm)

[0039] When producing the following types of steel coils in the leveling process, the leveling process parameters used are as follows:

[0040]

[0041] The final shape quality of the steel plate produced by the method is good, which reduces the quality objection loss and ensures the straightness of the online steel plate.

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
strengthaaaaaaaaaa
strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-strength rolled steel plate two-pass combination flattening process, and particularly relates to a shape improving process of a hot continuous rolling steel plate with a strength level larger than 450 MPa. The flattening process is divided into two different phases, and different processes are applied in different phases, namely in terms of the first pass, flattening is carried out with large tension and large pressure at a high speed, and in terms of the second pass, flattening is carried out with low tension and low pressure at a low speed. The shape improving effect of the steel plate is effectively guaranteed, and the plate shape qualified rate and the yield of a transverse cutting unit are guaranteed.

Description

technical field [0001] The invention relates to a two-pass combined leveling process for high-strength steel coils, in particular to a process for improving the shape of hot-rolled steel coils with a strength level greater than 450 MPa. Background technique [0002] With the rapid development of the automobile and construction machinery manufacturing industry, the strength of the steel plate required by the industry is getting higher and higher, the thickness is getting thinner and thinner, the shape requirements are more stringent, and the unevenness of the plate is required to be less than 3mm. Under this background, The original single-rolled medium plate raw material is gradually replaced by hot continuous rolling coil. More than 80% of the domestic steel industry has mastered this technology. The main production process is: converter continuous casting slab (high Mn, Cr) - hot Continuous rolling, controlled rolling and controlled cold rolling - bell furnace tempering (o...

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): B21B37/28
Inventor 赵胜林解颜
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD