Hot roll for rolling aluminium products and manufacturing method thereof

A manufacturing method and technology of hot rolls, which are applied in the direction of rolls, metal rolling, manufacturing tools, etc., can solve the problems of shortening the life of the rolls, increasing the labor intensity of workers, and reducing the quality of products, and achieving wear resistance and thermal crack resistance. Improved, good electrochemical corrosion resistance, improved hot roll life

Active Publication Date: 2013-12-11
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) Rolls made of Cr3 series materials have poor wear resistance and short roll changing cycle. Frequent roll replacement seriously restricts the production efficiency of continuous rolling equipment, increases the labor intensity of workers, and makes the production cost of products remain high; At the same time, due to the wear and tear of the roll, the shape retention ability of the roll is poor, the dimensional accuracy and shape of the rolled aluminum plate are difficult to guarantee, and the product quality is reduced;
[0008] (2) During the rolling process, since the roll is a steel material, the electrode potential of the aluminum plate is different from that of the alumin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1

[0039] 1. The design target of the chemical component content (weight percentage) of the hot roll of this embodiment is:

[0040] C, 0.60~0.70%; Si, 0.20~0.30%; Mn, 0.20~0.30%; P≤0.025%; S≤0.025%; Cr, 5.60~6.00%; Mo, 0.60~0.80%; V, 0.20~0.40 %; the rest is Fe and unavoidable impurities.

[0041] 2. The method for manufacturing a hot roll for rolling aluminum in this embodiment is:

[0042] (A) Steel ingot making: Prepare steel materials according to the above chemical components and their contents, and conduct preliminary smelting in an electric arc furnace. The smelting temperature is greater than 1630℃, and the control elements C, P, S content are appropriate and then the steel is tapped. The temperature is greater than 1590℃; after the smelting is completed, the molten steel is placed in the LF refining furnace to refine the molten steel. The refining temperature is 1580℃~1620℃; until the content of each alloy element is appropriate, the content of H is ≤1.5ppm,...

Example Embodiment

[0048] Example 2

[0049] The preparation method of Example 2 is the same as the preparation method of Example 1, the difference lies in:

[0050] The design target of the chemical component content (weight percentage) of the hot roll of Example 2 is:

[0051] C, 0.70~0.80%; Si, 0.50~0.70%; Mn, 0.50~0.70%; P≤0.020%; S≤0.015%; Cr, 4.80~5.20%; Mo, 0.50~0.70%; V, 0.10~0.20 %; the rest is Fe and unavoidable impurities.

[0052] After chemical composition analysis of the steel ingot, the final chemical composition content (weight percentage) of the steel ingot is:

[0053] C, 0.75%; Si, 0.55%; Mn, 0.65%; P, 0.018%; S, 0.015%; Cr, 5.05%; Mo, 0.50%; V, 0.10%; the rest is Fe and unavoidable impurities.

[0054] The quenching temperature in step (d) is 960°C; the tempering temperature in step (e) is 440°C, and the tempering time is 80h.

Example Embodiment

[0055] Example 3

[0056] The preparation method of Example 3 is the same as the preparation method of Example 1, the difference lies in:

[0057] The design target of the chemical component content (weight percentage) of the hot roll of Example 3 is:

[0058] C, 0.70~0.80%; Si, 0.80~1.10%; Mn, 0.80~1.00%; P≤0.020%; S≤0.015%; Cr, 4.80~5.20%; Mo, 1.00~1.20%; V, 0.80~1.00 %; the rest is Fe and unavoidable impurities.

[0059] After chemical composition analysis of the steel ingot, the final chemical composition content (weight percentage) of the steel ingot is:

[0060] C, 0.80%; Si, 1.00%; Mn, 1.00%; P, 0.016%; S, 0.013%; Cr, 4.90%; Mo, 1.15%; V, 1.00%; the rest is Fe and unavoidable impurities.

[0061] The quenching temperature in step (d) is 980°C; the tempering temperature in step (e) is 500°C, and the tempering time is 70h.

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PUM

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Abstract

The invention discloses a hot roll for rolling aluminium products and a manufacturing method thereof. The hot roll is prepared from the following chemical constituents in percentage by weight: 0.50-0.80% of C, 0.20-1.50% of Si, 0.20-1.00% of Mn, no more than 0.025% of P, no more than 0.025% of S, 4.50-6.00% of Cr, 0.50-2.00% of Mo, 0.10-1.00% of V and the balance of Fe and inevitable impurities. The manufacturing method for the hot roll for rolling aluminium products includes the technological steps of steel ingot refining, roll blank forging, hardening and tempering as well as machining, quenching thermal treatment, tempering and the like. The hot roll for rolling aluminium products, which is provided by the invention, has high wearing resistance, excellent hot cracking resistance and electrochemical corrosion resistance, and the service life of the hot roll is prolonged by 50% above in comparison with that of a common hot roll made of Cr3 material.

Description

technical field [0001] The invention relates to a roll and a manufacturing method thereof, in particular to a hot rolling roll for rolling aluminum 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. In the hot rolling process, the rolls are subje...

Claims

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Application Information

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IPC IPC(8): C22C38/24C21D9/38B21B27/00
Inventor 杨昱东田兴飞吴小强孙满臣苗金平
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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