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High-boron low-alloy high-speed steel roll and preparation method thereof

A low-alloy, high-speed steel technology, applied in the direction of metal rolling, metal rolling, rolls, etc.

Active Publication Date: 2010-09-15
JIANGSU DONGYE ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies existing in the existing high-speed steel rolls, and provide high-boron low-alloy high-speed steel rolls and manufacturing methods thereof

Method used

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  • High-boron low-alloy high-speed steel roll and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A 500 kg medium frequency induction furnace is used to melt the roll body 1, and a 1500 medium frequency induction furnace is used to melt the roll core 2. Its manufacturing process steps are:

[0049] ① First, common steel scrap, ferrochrome and ferrotungsten are mixed and heated and melted, and ferrosilicon and ferromanganese are added after molten steel is melted.

[0050] ② After adjusting the composition before the furnace, the temperature is raised to 1510°C, aluminum is added for deoxidation, and then ferroniobium, ferro-vanadium, ferro-boron and ferro-titanium are added in sequence, and the molten steel is released when the temperature rises to 1570°C.

[0051] ③Crush nitrogen-containing ferrochromium and yttrium-based rare earth magnesium alloys into small pieces with a particle size of 8-12mm, dry them at 150°C, place them at the bottom of the ladle, and perform compound modification treatment on molten steel by pouring into the ladle.

[0052] ④Centrifugal c...

Embodiment 2

[0060] The roll body 1 is smelted in a 500 kg intermediate frequency induction furnace, and the roll core 2 is processed from forged steel blanks. Its manufacturing process steps are:

[0061] ① First, common steel scrap, ferrochrome and ferrotungsten are mixed and heated and melted, and ferrosilicon and ferromanganese are added after molten steel is melted.

[0062] ② After adjusting the composition before the furnace, the temperature is raised to 1538°C, aluminum is added for deoxidation, and then ferroniobium, ferro-vanadium, ferro-boron and ferro-titanium are added in sequence, and the molten steel is released when the temperature rises to 1594°C.

[0063] ③Crush nitrogen-containing ferromanganese and yttrium-based rare earth-magnesium alloys into small pieces with a particle size of 8-12mm. After drying at 180°C, place them at the bottom of the ladle, and perform compound modification treatment on molten steel by pouring into the ladle.

[0064] ④Centrifugal casting meth...

Embodiment 3

[0072] A 1000 kg medium frequency induction furnace is used to melt the roll body 1, and a 3000 medium frequency induction furnace is used to melt the roll core 2. Its manufacturing process steps are:

[0073] ① First, common steel scrap, ferrochrome and ferrotungsten are mixed and heated and melted, and ferrosilicon and ferromanganese are added after molten steel is melted.

[0074] ② After adjusting the composition before the furnace, the temperature is raised to 1525°C, aluminum is added for deoxidation, and then ferroniobium, ferro-vanadium, ferro-boron and ferro-titanium are added in sequence, and the molten steel is released when the temperature rises to 1571°C.

[0075] ③Crush nitrogen-containing ferrochromium and yttrium-based rare earth magnesium alloys into small pieces with a particle size of 8-12mm, dry them at 170°C, place them at the bottom of the ladle, and use the method of pouring into the ladle to perform composite modification of molten steel.

[0076] ④The...

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Abstract

The invention relates to high-boron low-alloy high-speed steel roll and a preparation method thereof. The roll comprises two parts, namely a roll barrel (1) and a roll core (2), wherein the roll barrel comprises the following chemical components by weight percent: 0.32-0.55% of C, 1.42-2.13% of B, 5.2-6.5% of Cr, 2.5-4.5% of W, 1.6-1.8% of V, 0.5-1.0% of Nb, 0.3-1.0% of Si, 0.3-1.0% of Mn, 0.10-0.20% of Ti, 0.05-0.12% of N, 0.04-0.12% of Y, 0.08-0.15% of Mg, less than 0.04% of P, less than 0.04% of S and the balance Fe. The roll prepared by the method of the invention is characterized by high hardness, deep quenched depth and good wear resistance and thermal fatigue resistance, and has good use effect in the production of hot rolled steel.

Description

technical field [0001] The invention belongs to the technical field of steel rolling, and relates to a manufacturing method of a roll, in particular to a high-boron low-alloy high-speed steel roll and a manufacturing method thereof. Background technique [0002] With the rapid development of the modern steel rolling industry, the demand for rolls in steel mills is increasing, and the requirements for roll performance are getting higher and higher. Semi-steel rolls, high-nickel-chromium infinitely chilled cast iron rolls and high-chromium cast iron rolls have excellent performance and has been widely used. However, due to the small number of alloy carbides in semi-steel rolls and the low hardness of the rolls, when used in a hot-rolling finishing mill with severe wear and tear, the rolls will wear a lot and consume a lot. Due to the high nickel and chromium infinitely chilled cast iron rolls, the carbides in M 3 Type C is the main type, and the carbides are distributed in a...

Claims

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Application Information

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IPC IPC(8): C22C38/32C22C33/06C21C5/52B22D13/02B22D19/16C21D1/26B21B27/00
CPCY02P10/20
Inventor 戴建方符寒光
Owner JIANGSU DONGYE ROLL
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