Low-alloy high speed steel roll material and preparation method thereof

A manufacturing method, high-speed steel technology, applied in the direction of metal rolling, metal rolling, rolls, etc., can solve the problems that limit the application and development of high-speed steel rolls, and achieve the effects of reduced production costs and good red hardness

Inactive Publication Date: 2007-11-28
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, due to the great increase in the price of alloys such as W and Mo, the application and development of high-speed steel rolls have been limited to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A medium-frequency induction furnace with a capacity of 2500 kg is used to melt low-alloy high-speed steel roll materials. The manufacturing process steps are:

[0045] ①Heating and melting ordinary steel scrap, pig iron, ferrochrome, ferrotungsten and ferromolybdenum, adding ferrosilicon and ferrovanadium after molten steel is melted, adding metallic aluminum, nitrogen-containing ferrochrome, ferroniobium and ferrotitanium in sequence before being released from the furnace;

[0046] ② After adjusting the ingredients in front of the furnace, the temperature is raised to 1596°C, and then it is released from the furnace;

[0047] ③Crush the yttrium-based rare earth and ferroboron into small pieces with a particle size of less than 16mm, after drying below 200°C, place them at the bottom of the ladle, and perform compound modification treatment on the molten steel by pouring into the ladle;

[0048] ④ Manufacture high-speed steel rolls by centrifugal compound casting metho...

Embodiment 2

[0054] A medium-frequency induction furnace with a capacity of 1500 kg is used to smelt low-alloy high-speed steel roll materials. The manufacturing process steps are:

[0055] ①Heating and melting ordinary steel scrap, pig iron, ferrochrome, ferrotungsten and ferromolybdenum, adding ferrosilicon and ferrovanadium after molten steel is melted, adding metallic aluminum, nitrogen-containing ferrochrome, ferroniobium and ferrotitanium in sequence before being released from the furnace;

[0056] ② After adjusting the ingredients in front of the furnace, the temperature is raised to 1607°C, and then it is released from the furnace;

[0057] ③Crush the yttrium-based rare earth and ferroboron into small pieces with a particle size of less than 16mm. After drying at a temperature below 200°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;

[0058] ④Using continuous compound casting method to manufa...

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Abstract

A kind of low alloy high speed steel roller material and the method to produce it. The chemical components of it is( weight percent): C: 1.2-1.8%, Cr: 4.5-6.5%, W: 1.0-3.0%, Mo: 1.0- 3.0%, V: 3.0-5.0%, Al: 0.6-1.2%, Si: 0.8-1.2%, N: 0.05-0.15 %, B: 0.04-0.12%, Nb: 0.05-0.20%, Ti: 0.06-0.18%, Y: 0.04- 0.15%, Mn<0.5%, P<0.04%, S<0.04%, the other is Fe, and the actual content of carbon of it is: 0.033W+0.063Mo+0.060Cr+0.200V+(0.08-0.20). It is made by smelting with electric cooker, the roller is molded by centrifugal complex cast or continuous complex cast, the roller will be quenched and tempered after it has been processed rudely, and the regulated size and accuracy will fulfilled after a fine machining at last. Less Tungsten and Molybdenum element are contained in the low alloy high speed steel roller material, and it does not contain the expensive Cobalt, the production cost of it is lower, and it own high red-hardness, obdurability and abrasion resistance. This patent can improve the productivity of the rolling mill, and prolong the life of roller, and decrease the cost of rolled metal.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant materials, and relates to a high-speed steel material used as a roll and its manufacture, in particular to a low-alloy high-speed steel roll material with less alloy content and a manufacturing method thereof. Background technique [0002] With the advancement of steel rolling technology, including the relentless pursuit of higher rolling efficiency, higher rolled product quality and lower rolling cost, the roll manufacturing technology is also undergoing rapid development. In the late 1980s, Japan first developed high-speed steel rolls. Soon afterwards, steel companies in Europe and the United States also developed and used high-speed steel rolls one after another. At present, high-speed steel rolls have been widely used abroad, not only in cold and hot plate and strip mills, but also in wire, bar mills, roughing mills, steel pipe mills, etc. In recent years, dom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/32C22C38/36C22C33/04B22D27/04C21D1/18C21D9/38B21B27/00
CPCY02P10/20
Inventor 蒋志强符寒光冯锡兰宗学文施进发李明伟张轶
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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