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Boron-containing high speed steel roller and preparation method thereof

A high-speed steel and roll technology, applied in the field of steel rolling, can solve the problems of large fluctuations in mechanical properties and poor wear resistance, and achieve the effects of good machining performance, high tool consumption and low direct processing efficiency.

Inactive Publication Date: 2012-04-11
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the various rolls that have been developed at home and abroad generally have the shortcomings of large fluctuations in mechanical properties and poor wear resistance. The present invention aims at the shortcomings of existing rolls, and has invented a method for preparing an integral boron-containing high-speed steel roll with excellent performance.

Method used

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  • Boron-containing high speed steel roller and preparation method thereof
  • Boron-containing high speed steel roller and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The boron-containing high-speed steel roll material is smelted in a 500-kg medium-frequency induction furnace. The specific manufacturing process steps are:

[0049] 1) First, use scrap steel, recarburizer, ferrochrome, copper plate, ferrotungsten and ferromolybdenum to mix and heat and melt. After the molten steel is melted, add ferrosilicon. When the temperature rises to 1524°C, add aluminum and nitrogen-containing ferrochrome, and then add vanadium in sequence. Iron, ferro-boron and ferro-titanium, after adjusting the components before the furnace to pass, the temperature of the molten steel is raised to 1563°C, and the slag is removed from the furnace.

[0050] 2) Crushing iron bismuth, copper telluride master alloy, potassium-containing substance, sodium-containing substance and rare earth magnesium alloy (the rare earth element is cerium) into small pieces with a particle size of less than 10mm, dried at 200°C, and placed in a ladle At the bottom, the molten steel...

Embodiment 2

[0057] The boron-containing high-speed steel roll material is smelted in a 750-kg medium-frequency induction furnace. The specific manufacturing process steps are:

[0058] 1) First, use scrap steel, recarburizer, ferrochrome, copper plate, ferrotungsten and ferromolybdenum to mix and heat and melt. After the molten steel is melted, add ferrosilicon. When the temperature rises to 1549°C, add aluminum and nitrogen-containing ferrochrome, and then add vanadium in turn. Iron, ferro-boron and ferro-titanium, after adjusting the composition before the furnace to pass, the temperature of the molten steel is raised to 1580°C, and the slag is removed from the furnace.

[0059] 2) Crushing iron bismuth, copper telluride master alloy, potassium-containing substance, sodium-containing substance and rare earth magnesium alloy (specifically, the rare earth element is lanthanum) into small pieces with a particle size of less than 10mm, dried at 180°C, and placed in a ladle At the bottom, th...

Embodiment 3

[0066] The boron-containing high-speed steel roll material is smelted with a 750 kg medium-frequency induction furnace, and the manufacturing process steps are:

[0067] 1) First, use scrap steel, recarburizer, ferrochrome, copper plate, ferrotungsten and ferromolybdenum to mix and heat and melt, then add ferrosilicon after the molten steel is melted, and when the temperature rises to 1536°C, add aluminum and nitrogen-containing ferrochrome, and then add vanadium in sequence Iron, ferro-boron and ferro-titanium, after adjusting the composition before the furnace to pass, the temperature of the molten steel is raised to 1571°C, and the slag is removed from the furnace.

[0068] 2) Crushing iron bismuth, copper telluride master alloy, potassium-containing substance, sodium-containing substance and rare earth magnesium alloy (the specific rare earth element is yttrium) into small pieces with a particle size of less than 10mm, dried at 190°C, and placed in a ladle At the bottom, t...

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Abstract

The invention relates to a boron-containing high speed steel roller and a preparation method thereof, and belongs to the technical field of steel rolling. The steel roller comprises the following chemical components, by mass, 0.95-1.15% of C, 8.5-9.0% of Cr, 1.0-1.2% of Mo, 0.5-0.8% of W, 0.5-0.8% of V, 0.4-0.6% of B, 1.6-1.8% of Al, 0.18-0.25% of N, 0.4-0.6% of Cu, 1.2-1.4% of Si, 0.06-0.10% of RE ,0.03-0.06% of Mg, 0.04-0.08% of Ti, 0.025-0.045% of K, 0.025-0.045% of Na, 0.02-0.04% of Te, 0.02-0.04% of Bi, less than 0.5% of Mn, less than 0.025% of S, less than 0.030% of P, and the balance of Fe and inevitable trace impurities. The boron-containing high speed steel roller of the present invention can be produced by an electric furnace, and has advantages of high roll surface hardness, good wear resistance, high roll neck strength, good toughness and the like.

Description

technical field [0001] The invention relates to a cast steel roll and a preparation method thereof, in particular to a boron-containing high-speed steel roll and a preparation method thereof, and belongs to the technical field of steel rolling. Background technique [0002] The variety and manufacturing process of rolls are constantly developing with the progress of metallurgical technology and the evolution of steel rolling equipment. Low-strength gray cast iron rolls were used in the rolling of soft non-ferrous metals in the Middle Ages. In the middle of the 18th century, Britain mastered the production technology of chilled cast iron rolls for rolling steel plates. In the second half of the 19th century, the progress of European steelmaking technology required the rolling of larger tonnage steel ingots, and the strength of the gray cast iron or chilled cast iron rolls could no longer meet the requirements. Carbon content is 0.4% ~ 0.6% ordinary cast steel rolls were bor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/60C21D9/38C21D1/70
Inventor 雷永平邢建东符寒光郭红星蒋业华周荣岑启宏窦永平
Owner BEIJING UNIV OF TECH
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