Production process for 48MnV round steel

A production process, 48mnv technology, applied in the field of metallurgical rolling, can solve the problems of easy leakage of steel slabs, the inability to control it, and the lack of improvement effects

Inactive Publication Date: 2012-02-29
NANJING IRON & STEEL CO LTD
View PDF1 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Relevant studies have shown that when the solid phase ratio fs in the center of the slab is less than 30%, the center porosity and center segregation will hardly occur. If light reduction or large shrinkage roll gap is used at this time, it is easy to break out or produce slabs.

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
  • Production process for 48MnV round steel
  • Production process for 48MnV round steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Rolling number: B90196301, the cumulative reduction of this rolling number is 5mm during continuous casting, and two passes of large reduction are used during rolling, and the reduction of each pass is 80mm.

Embodiment 2

[0061] Rolling number: B00187901, the cumulative reduction of this rolling number is 5mm during continuous casting, and two passes of large reduction are used during rolling, and the reduction of each pass is 30mm.

[0062] After the sample was heated at (1000±5)°C for 30 minutes, and cooled to room temperature in still air, the data were better than those of the control sample, see Table 4.

[0063] Table 4

[0064] 　 ReL, MPa Rm, MPa A，% Z，% Impact energy AKU2 J Require ≥500 ≥800-920 ≥13 ≥25 ≥32 B90196301 625 / 640 915 / 910 14.0 / 15.0 41.5 / 40.5 45 B00187901 615 / 635 925 / 915 15.5 / 15.5 40.1.0 / 42..0 47 Parallelization 580 / 575 890 / 880 13.5 35 36

[0065] The present invention adopts the continuous casting bloom dynamic light reduction technology during smelting, and adopts the large reduction rolling process during rolling. These two processes are superimposed and used in the production of non-quenched and tempered steel 48...

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 production process for 48MnV round steel. In the invention, continuous casting dynamic soft reduction and heavy draught rolling processes are combined for producing 48MnV round steel. The production process comprises the following specific steps of: manufacturing a 48MnV casting blank meeting a certain requirement by using the continuous casting dynamic soft reduction process; in a rolling production line, heating the casting blank and rolling by adopting the heavy draught process, wherein the rolling compression ratio is more than or equal to 6.0; controlling the initial rolling temperature at 1,180-1,050 DEG C and controlling the final rolling temperature at 950-920 DEG C; and slowly cooling, rectifying, performing ultrasonic wave and eddy current fault detection, packing and warehousing to obtain the 48MnV round steel. In the production process, the continuous casting dynamic soft reduction and heavy draught rolling processes are combined, bulk compaction, crack press fit, segregation improvement and inclusion dispersion are realized, the density and uniformity of steel are improved, and the mechanical performance of the steel is improved.

Description

[0001] technical field [0002] The invention belongs to the field of metallurgical rolling and relates to a production process of 48MnV round steel which combines continuous casting dynamic light reduction and large reduction rolling processes together. Background technique [0003] 48MnV is non-quenched and tempered steel for hot forging, mainly used to manufacture diesel engine crankshafts. 48MnV steel is Mn-V series pearlite + ferrite non-quenched and tempered steel. In order to obtain better comprehensive mechanical properties, continuous casting blooms are used. Solidification end dynamic soft depressing technology. [0004] The dynamic soft reduction technology at the end of solidification began in the late 1970s and early 1980s. It was developed on the basis of the roll gap shrinkage technology. The amount of reduction (4~14mm) compensates or offsets the solidification shrinkage of the slab, and prevents the residual molten steel rich in segregation elements from fl...

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): B22D11/16C21D8/06C22C38/50B21B37/74
Inventor 王时林
Owner NANJING IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap