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Boron-contained high-chromium high-speed steel roller material and heat treatment method thereof

A high-speed steel and roll technology, applied in the field of roll manufacturing, can solve the problems of high addition of precious alloy elements and high cost of roll production, and achieve the effect of fine solidified structure, improved strength and toughness

Inactive Publication Date: 2010-08-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned high-speed steel roll materials all have the disadvantages of high addition of precious alloy elements and high roll production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A 1000 kg intermediate frequency induction furnace is used to melt the boron-containing high-chromium high-speed steel roll material. The specific process steps are:

[0036] ① Firstly, scrap steel, pig iron, ferromolybdenum, ferrochrome, ferrotungsten and nickel plate are mixed and heated in the furnace to melt, after the molten steel is dissolved, ferrosilicon and ferromanganese are added, the temperature is raised to 1532°C, and ferrovanadium, ferroniobium and boron are added in sequence Iron, of which ferroniobium is only added to 88% of the total amount added, ferroboron is only added to 95% of the total amount to be added, after 15 minutes of heat preservation, silicon-calcium alloy is added for pre-deoxidation, aluminum is added for final deoxidation, and the adjusted composition before the furnace is qualified After the oven.

[0037] ②Crush the rare earth ferrosilicon, potassium salt, tantalum iron, metal zinc, ferroboron and ferroniobium into small pieces with...

Embodiment 2

[0041] A 1000 kg intermediate frequency induction furnace is used to melt the boron-containing high-chromium high-speed steel roll material. The specific process steps are:

[0042] ① First, mix scrap steel, pig iron, ferromolybdenum, ferrochrome, ferrotungsten and nickel plate in the furnace and heat and melt them. After the molten steel is dissolved, add ferrosilicon and ferromanganese. Raise the temperature to 1557°C, then add ferrovanadium, ferroniobium and boron in sequence. Iron, of which ferroniobium is only added to 92% of the total amount added, ferroboron is only added to 92% of the total amount added, after 8 minutes of heat preservation, silicon-calcium alloy is added for pre-deoxidation, aluminum is added for final deoxidation, and the adjusted composition before the furnace is qualified After the oven.

[0043] ②Crush the rare earth ferrosilicon, potassium salt, tantalum iron, metal zinc, ferroboron and ferroniobium into small pieces with a particle size of 10-15...

Embodiment 3

[0047] A 750 kg intermediate frequency induction furnace is used to melt boron-containing high-chromium high-speed steel roll materials. The specific process steps are:

[0048] ① Firstly, scrap steel, pig iron, ferromolybdenum, ferrochromium, ferrotungsten and nickel plates are mixed and heated in the furnace to melt, after the molten steel is dissolved, ferrosilicon and ferromanganese are added, the temperature is raised to 1548°C, and ferrovanadium, ferroniobium and boron are added in sequence Iron, of which ferroniobium is only added to 90% of the total amount added, ferroboron is only added to 94% of the total amount to be added, after 10 minutes of heat preservation, silicon-calcium alloy is added for pre-deoxidation, aluminum is added for final deoxidation, and the composition of the adjustment before the furnace is qualified After the oven.

[0049] ②Crush the rare earth ferrosilicon, potassium salt, tantalum iron, metal zinc, ferroboron and ferroniobium into small pie...

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Abstract

The invention discloses a boron-contained high-chromium high-speed steel roller material and a heat treatment method thereof. The boron-contained high-chromium high-speed steel roller material comprises the chemical compositions by mass percentage: 2.6-3.0 of C, 2.0-2.8 of Mo, 1.0-1.5 of W, 0.6-1.0 of Nb, 1.0-1.5 of V, 24-28 of Cr, 0.5-0.8 of B, 0.7-1.2 of Ni, 0.5-1.0 of Si, 0.5-1.2 of Mn, 0.008-0.015 of Ca, 0.06-0.08 of Zn, 0.02-0.05 of Ta, 0.03-0.06 of RE, 0.04-0.10 of K and the balance of Fe and inevitable trace impurities. The roller material is finely processed into a roller by smelting, outside furnace deterioration, casting and heat treatment. The roller material has the advantages of high hardness, good abrasion resistance, long service life, no high-temperature heat treatment, simple and convenient process, low energy consumption, and the like, thereby having favorable economic benefits by being popularized and applied.

Description

technical field [0001] The invention relates to a high-speed steel roll material, in particular to a boron-containing high-chromium high-speed steel roll material and a heat treatment method thereof, belonging to the field of roll manufacturing. Background technique [0002] High-speed steel rolls have been widely used in western developed countries since their birth until now, especially in Japan. The finishing front frame of the hot-rolled strip mill has all used high-speed steel rolls, and the utilization rate of the finishing frame has reached 50%. Therefore, the average roll consumption per ton of steel for hot-rolled plates and strips in Japan is 0.4 kg / ton. Nisshin Steel’s hot-rolled strip mills use CPC high-speed steel rolls, and the roll consumption per ton of steel is only 0.3 kg / ton. At present, the average roll consumption per ton of steel for hot-rolled plates and strips in my country is about 0.8 kg / ton, but in the near future, the roll consumption per ton of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08C21C7/06B22D1/00C21D9/38
Inventor 符寒光徐建忠雷永平成小乐杜忠泽
Owner BEIJING UNIV OF TECH
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