Hot rolling roller for rolling nonferrous metal, and manufacturing method thereof

A technology of non-ferrous metals and manufacturing methods, applied in the direction of rolls, metal rolling, manufacturing tools, etc., can solve the problems of easy occurrence of thermal cracks, high production costs, and decline in product quality, and achieve wear resistance and thermal crack resistance Improved performance, good electrochemical corrosion resistance, and improved hot roll life

Active Publication Date: 2013-11-27
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
View PDF5 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main material of domestic hot rolls used for rolling non-ferrous metals is Cr3 series materials. However, hot rolls of this type of material can no longer meet market demand and high-quality product surface requirements. The reasons include the following:
[0005] (1) The rolls made of Cr3 series materials have poor wear resistance and short roll changing cycle; according to statistics, such non-ferrous metal hot rolls may fail after continuous rolling of about 600 tons of metal rods. The production efficiency of the rolling equipment increases the labor intensity of the workers, and makes the production cost of the product remain high; at the same time, due to the wear of the roll, the ability to maintain the roll shape is poor, and the dimensional accuracy and shape of the rolled plate are difficult to guarantee. , product quality declines;
[0006] (2) During ...

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] One, the design target of the chemical composition content (weight percentage) of the hot roll of the present embodiment is:

[0037] C, 0.50~0.60%; Si, 0.30~0.40%; Mn, 0.9~1.0%; P≤0.02%; S≤0.02%; Cr, 5.5~6.0%; Ni, 0.20~0.40%; Mo, 0.60~0.80 %; V, 0.10-0.20%; the rest is Fe and unavoidable impurities.

[0038] Two, the manufacture method of a kind of hot rolling roll of rolling nonferrous metal of the present embodiment is:

[0039](a) Making steel ingots: Prepare steel raw materials according to the above chemical components and their contents, and conduct preliminary melting in an electric arc furnace with a melting temperature greater than 1640°C; after melting, put molten steel in an LF refining furnace to refine molten steel, The temperature is 1590°C-1610°C; after the content of each alloy element and H, O, and N gases is suitable, adjust the temperature to 1530°C-1550°C to tap the steel, and cast it into a steel ingot in the form of die casting, and anneal the st...

Embodiment 2

[0045] The preparation method of embodiment 2 is identical with the preparation method of embodiment 1, and its difference is:

[0046] The design target of the chemical composition content (percentage by weight) of the hot roll of embodiment 2 is:

[0047] C, 0.60~0.70%; Si, 0.50~0.60%; Mn, 0.20~0.30%; P≤0.020%; S≤0.015%; Cr, 4.50~5.00%; Ni, 0.50~0.80%; %; V, 0.30~0.50%; the rest is Fe and unavoidable impurities.

[0048] After analyzing the chemical composition of the steel ingot, the content (weight percentage) of the final chemical composition of the steel ingot is:

[0049] C, 0.63%; Si, 0.50%; Mn, 0.20%; P, 0.019%; S, 0.011%; Cr, 4.50%; Ni, 0.80%; Mo, 0.84%; V, 0.34%; Avoid impurities.

[0050] The quenching temperature in step (d) is 970°C; the tempering temperature in step (e) is 450°C, and the tempering time is 50h.

Embodiment 3

[0052] The preparation method of embodiment 3 is identical with the preparation method of embodiment 1, and its difference is:

[0053] The design target of the chemical composition content (percentage by weight) of the hot roll of embodiment 3 is:

[0054] C, 0.70~0.80%; Si, 1.00~1.20%; Mn, 0.50~0.70%; P≤0.018%; S≤0.020%; Cr, 5.00~5.50%; Ni, 0.30~0.50%; %; V, 0.40~0.50%; the rest is Fe and unavoidable impurities.

[0055] After analyzing the chemical composition of the steel ingot, the content (weight percentage) of the final chemical composition of the steel ingot is:

[0056] C, 0.72%; Si, 1.2%; Mn, 0.68%; P, 0.017%; S, 0.020%; Cr, 5.30%; Ni, 0.35%; Mo, 1.00%; V, 0.41%; Avoid impurities.

[0057] The quenching temperature in step (d) is 950°C; the tempering temperature in step (e) is 400°C, and the tempering time is 70h.

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 present invention discloses a hot rolling roller for rolling a nonferrous metal, and a manufacturing method thereof. Chemical components of the roller comprise, by weight, 0.50-0.80% of C, 0.30-1.20% of Si, 0.20-1.00% of Mn, less than or equal to 0.025% of P, less than or equal to 0.020% of S, 4.50-6.00% of Cr, 0.20-0.80% of Ni, 0.20-1.00% of Mo, 0.10-0.50% of V, and the balance of Fe and unavoidable impurities. The manufacturing method of the roller comprises the following process steps: a, refining a steel ingot; b, forging a roller blank; c, carrying out quenching and tempering, and carrying out mechanical processing; d, carrying out a quenching heat treatment; and e, carrying out a tempering treatment. The hot rolling roller has characteristics of high wear resistance, good thermal cracking resistance and good electrochemical corrosion resistance, and a service life of the hot rolling roller can be increased by more than 50% compared with the ordinary Cr3 roller.

Description

technical field [0001] The invention relates to a roll and a manufacturing method thereof, in particular to a hot rolling roll for rolling nonferrous metals and a manufacturing method thereof. Background technique [0002] The roll is an important part of the rolling mill in the rolling mill and an important consumable part that determines the efficiency of the rolling mill and the quality of the rolled product. The rolls use the pressure generated by a pair or a group of rolls to roll the rolled piece, so that the rolled piece produces plastic deformation and obtains an ideal design shape. Therefore, the quality of the roll is directly related to the surface quality of the rolled product and the rolled steel. machine productivity. It is mainly subjected to dynamic and static loads, wear and temperature changes during rolling. [0003] According to different working conditions, rolls are usually divided into cold rolls and hot rolls. Among them, hot rolling rolls are usua...

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): C22C38/46C21D9/38B21B27/00
Inventor 杨昱东吴小强苗金平孙满臣
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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