Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for solving cracks of head and tail blanks of 10Cr17 steel grade

A technology of head and tail, steel grade, applied in the field of solving 10Cr17 steel grade head and tail billet cracks, can solve problems such as reducing the yield of head and tail billets, affecting the use of head and tail billets, etc. Quality, the effect of eliminating the phenomenon of surface peeling

Pending Publication Date: 2021-10-22
SHANDONG TAISHAN STEEL GROUP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These all reduce the yield of the head and tail blanks and affect the use of the head and tail blanks

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
  • Method for solving cracks of head and tail blanks of 10Cr17 steel grade
  • Method for solving cracks of head and tail blanks of 10Cr17 steel grade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Dephosphorization process: molten iron P: 0.075-0.150%, use lime powder and dephosphorization agent to dephosphorize, remove slag after dephosphorization, and after pretreatment, semi-steel P < 0.020%;

[0025] Step 2: TSR furnace smelting process: the addition of high-carbon ferrochrome is 20-30%, the dephosphorized semi-steel P 6 minutes, Cr after reduction: 16.0-17.5%, the amount of ferrosilicon added is 1-1.5% for reduction, the slag color after reduction is controlled to be white slag, and the secondary desulfurization process is adopted to strictly control the output Steel sulfur content, tapping sulfur content ≤ 0.006%;

[0026] Step 3: LF refining process: After the molten steel reaches LF, the thickness of the slag layer in the ladle is 150-300mm, the entering temperature is 1500-1620°C, the refining time is 45-120min, the power transmission time is 15-40min, and lime and fluorite are added to adjust the refining Alkalinity R > 2.0, soft blowing time, s...

Embodiment 2～3 and comparative example 1～8

[0031] The grinding methods of Examples 2-3 and Comparative Examples 1-8 are the same as those of Example 1, the difference lies in the grinding temperature, the current of the grinding machine and the number of grinding times, see Table 1 for details.

[0032] Table 1

[0033]

[0034]

[0035] During the grinding process of Examples 1 to 3 and Comparative Examples 1 to 8, the grinding rate of the head and tail blanks after the grinding is counted; and the finished head and tail blanks are hot-rolled and pickled to calculate the first-grade product rate; the results can be seen in Table 2.

[0036] Table 2

[0037] project Grinding rate% First grade rate% Example 1 2.6 100 Example 2 2.8 100 Example 3 2.7 100 Comparative example 1 4.3 73 Comparative example 2 4.8 66 Comparative example 3 4.3 96 Comparative example 4 4.2 94 Comparative example 5 4.2 90 Comparative example 6 4.0 94 Comparativ...

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

No PUM Login to View More

Abstract

The invention discloses a method for solving cracks of head and tail blanks of a 10Cr17 steel grade. The method for solving cracks of the head and tail blanks of the 10Cr17 steel grade comprises the following steps of: keeping the temperature of the head and tail blanks of the 10Cr17 steel grade at 200-400 DEG C, and sequentially carrying out rough grinding and accurate grinding on the surfaces of the head and tail blanks by using a grinding machine; and when the temperature of the head and tail blanks is lower than 150 DEG C, stopping grinding. And during rough grinding, the current of the grinding machine is 250-350A. And during accurate grinding, the current of the grinding machine is 120-200A. According to the method for solving cracks of the head and tail blanks of the 10Cr17 steel grade, the problem that cracks are locally generated on the surfaces of the 10Cr17 head and tail blanks is solved, the surface peeling phenomenon of subsequent hot rolled steel coils is completely eradicated, the pickling first-grade product rate is remarkably increased, and therefore, the product quality is improved, and economic benefits are greatly improved. According to the method for solving cracks of the head and tail blanks of the 10Cr17 steel grade, the grinding frequency and the grinding rate can be reduced, cracks of the head and tail blanks are avoided, and the product cost is reduced.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for solving cracks in head and tail billets of 10Cr17 steel. Background technique [0002] 10Cr17 steel has a wide range of uses, and stainless steel has strong corrosion resistance and good formability. However, when the 10Cr17 steel grade was first produced and at the end of production, the production process control was unstable, and the initial casting speed was low and the cooling intensity was low during the pouring process, which made the obtained head and tail blanks prone to defects. For example, defects such as cracks and cracks are prone to occur in the grinding process of the head and tail billets; defects such as peeling and cracks in the steel strip are prone to appear after rolling and pickling, thereby reducing the yield of the head and tail billets. [0003] There are many reasons for cracks in 10Cr17 steel, such as the amount of vanadium added, the ...

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
IPC IPC(8): B24B1/00
CPCB24B1/00
Inventor 赵刚亓欣华焦玉水吴荣刚殷齐敏乔春刚王福河朱坤亮邵书明柴坤军
Owner SHANDONG TAISHAN STEEL GROUP
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com