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An improved cold roll

An improved technology for cold rolls, which is applied in the field of roll preparation, can solve the problems of lack of universal applicability and high manufacturing costs, and achieve the effects of easy popularization and application, good wear resistance, and low energy consumption

Active Publication Date: 2016-12-28
TAIZHOU HONGHUA METALLURGICAL MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application added elements Be and Zr, through the solid-solution strengthening and fine-grain strengthening of these two elements, steel for high-hardness cold rolling rolls was obtained, but the manufacturing cost of this application is high, and it is not universally applicable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]The composition of the improved cold roll in this embodiment is preferably C 2.0%; Si 1.4%; Mn 0.4%; P 0.08%; S0.05%; Cr 7.0%; Ni 0.15%; Mo 0.25%; Nb 0.16%; 0.4%; N 0.25%; Al 0.05%; Zr 0.1%; Cu0.12%; Ti 0.15%, the balance is Fe and unavoidable impurities.

[0037] The preparation steps of the improved cold roll of the present invention are:

[0038] Step 1: Melting is carried out according to the above-mentioned chemical element composition ratio, and the roll cast slab is cast.

[0039] Step 2: Anneal the roll. The specific annealing process is as follows: heat the roll to 910°C for 3 hours, cool it in the furnace to 765°C, hold it for 5 hours, then cool it to below 550°C and take it out of the furnace for air cooling, and then rough process the roll. In this embodiment, firstly, the roll is annealed, and the heating temperature is controlled between 900°C and 920°C, the purpose of which is to improve the processing performance of the roll and increase the efficiency o...

Embodiment 2

[0046] An improved cold rolling roll in this embodiment is basically the same as in Example 1, except that the chemical element mass percentage composition of the cold rolling roll in this embodiment is as follows: C 1.8%; Si 1.8%; Mn 0.3%; P 0.07%; S 0.04%; Cr6.0%; Ni 0.2%; Mo 0.2%; Nb 0.22%; V 0.2%; N 0.20%; Al 0.01%; Zr 0.05%; Cu 0.24%; The amount is Fe and unavoidable impurities. Its preparation process is:

[0047] Step 1. Melting is carried out according to the distribution ratio of chemical elements, and a roll billet is cast;

[0048] Step 2, annealing the roll, the specific annealing process is: heating the roll to 900°C for 2 hours, furnace cooling to 750°C, holding for 6 hours, then furnace cooling to below 550°C and air cooling, and then rough machining the roll;

[0049] Step 3. Rapidly heat the roll to 950°C, and control the roll rotation in the cooling device. At the same time, apply a nano-ceramic coating on the surface of the roll neck. The thickness of the ...

Embodiment 3

[0053] An improved cold rolling roll in this embodiment is basically the same as in Example 1, except that the chemical element mass percentage composition of the cold rolling roll in this embodiment is as follows: C 2.3%; Si 0.8%; Mn 0.5%; P 0.08%; S 0.05%; Cr8.0%; Ni 0.1%; Mo 0.3%; Nb 0.08%; V 0.6%; N 0.15%; Al 0.05%; Zr 0.1%; Cu 0.12%; The amount is Fe and unavoidable impurities. Its preparation process is:

[0054] Step 1. Melting is carried out according to the distribution ratio of chemical elements, and a roll billet is cast;

[0055] Step 2: Carry out annealing treatment on the roll. The specific annealing treatment process is: heating the roll to 920°C for 4 hours, furnace cooling to 780°C, keeping it for 4 hours, then furnace cooling to below 550°C and air cooling, and then rough machining the roll;

[0056] Step 3. Rapidly heat the roll to 1020°C, and control the rotation of the roll in the cooling device. At the same time, coat the surface of the roll neck with a...

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Abstract

The invention discloses an improved cold roll, and belongs to the technical field of roll preparation. Based on conventionally adding Cr, Mn and Ni, N, Al, Zr and other elements are further added by starting from the angle of improving the roll microhardness and refining the roll grains to refine roll structure. The cold roll is prepared by the following steps: 1, melting according the proportion of chemical element components, and casting a roll casting blank; 2, annealing the roll; 3, carrying out primary heating to 950-1020 DEG C, controlling the roll to rotate in a cooling device, and cooling to a temperature of lower than 400 DEG C; 4, carrying out secondary heating to 700-750 DEG C, spraying water while heating for quenching; and 5, measuring the temperature on the surface of the roll in the cooling temperature, and stopping cooling when the temperature on the surface of the roll is lower than 200 DEG C. The cold roll has the advantages of improved structure homogeneity, small hardness drop, good abrasion resistance and strong stripping resistance.

Description

technical field [0001] The invention relates to the technical field of roll preparation, in particular to an improved cold roll. Background technique [0002] Modern metallurgical industrial production is a systematic project integrating mining, mineral processing, sintering, ironmaking, steelmaking and steel rolling. Steel rolling is the last link of this systematic project. Most metallurgical products can only enter the market after rolling. The roll is the most important production tool in the rolling process. The quality of the roll directly affects the output and quality of metallurgical products. The level of a country's roll manufacturing technology directly reflects the level of the country's metallurgical industry. [0003] Cold roll is an essential part of metal cold rolling equipment. As a tool for plastically deforming metal, its working conditions are very complicated, and it will be subject to bending, torsion, shearing, impact, friction and thermal stress duri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/60C22C38/56
Inventor 刘华山刘娜
Owner TAIZHOU HONGHUA METALLURGICAL MACHINERY
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