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High-speed steel alloy casting process used for roll

A casting technology, high-speed steel technology, applied in the field of metal casting technology, can solve the problems that the mechanical properties of high-speed steel alloys for rolls cannot be significantly improved, the phenomenon of carbide breaking is not obvious, and the refinement effect is not ideal. Improvement of casting defects, grain refinement of matrix, increase of heterogeneous cores

Inactive Publication Date: 2011-09-07
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the existing ordinary smelting process, in the as-cast structure of the high-speed steel alloy for rolls refined with a massive modifier, the grains are still relatively coarse, and the phenomenon of carbide breaking is not obvious. The mechanical properties of high-speed steel alloys for rolls No significant improvement in performance
Since the grain size of the modifier used is far from nanoscale, the effect of refining the matrix grain and structure of high-speed steel alloys for rolls is not ideal

Method used

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  • High-speed steel alloy casting process used for roll
  • High-speed steel alloy casting process used for roll
  • High-speed steel alloy casting process used for roll

Examples

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Comparison scheme
Effect test

Embodiment 1

[0049] The first step, the preparation of modifier

[0050] The flake-shaped nanocrystalline rare earth ferrosilicon inoculant and the flake-shaped nanocrystalline ferroboron refiner were respectively prepared by the rapid quenching strip method:

[0051] Weigh 50g of Fe-Ce-Si-Ca master alloy produced by Baotou Steel Sanfeng Rare Earth Co., Ltd., put it into the water-cooled copper crucible of the vacuum quenching furnace, and adjust the position of the electrode so that it is in line with the Fe-Ce-Si-Ca in the crucible. The distance between the Ca intermediate alloy materials is 1mm, close the furnace door, the inlet and outlet, and the air release valve, and evacuate until the vacuum degree is higher than 5×10 -3 After Pa, wash the furnace with argon, then fill it with argon until the vacuum degree is 0.045Pa, adjust the arc current to gradually increase to 550A after arcing, melt the alloy in the crucible, and when the alloy is completely melted into a liquid state, tilt t...

Embodiment 2

[0125] The first step, the preparation of modifier

[0126] The flake-shaped nanocrystalline rare earth ferrosilicon inoculant and the flake-shaped nanocrystalline ferroboron refiner were respectively prepared by the rapid quenching strip method:

[0127]Weigh 50g of Fe-Ce-Si-Ca master alloy produced by Baotou Steel Sanfeng Rare Earth Co., Ltd., put it into the water-cooled copper crucible of the vacuum quenching furnace, and adjust the position of the electrode so that it is in line with the Fe-Ce-Si-Ca in the crucible. The distance between the Ca intermediate alloy materials is 0.5mm, close the furnace door, the inlet and outlet and the air release valve, and evacuate until the vacuum degree is higher than 5×10 -3 After Pa, wash the furnace with argon gas, then fill it with argon gas until the vacuum degree is 0.04Pa, adjust the arc current to gradually increase to 500A after the arc is started, and melt the alloy in the crucible, and when the alloy is completely melted into...

Embodiment 3

[0149] The first step, the preparation of modifier

[0150] The flake-shaped nanocrystalline rare earth ferrosilicon inoculant and the flake-shaped nanocrystalline ferroboron refiner were respectively prepared by the rapid quenching strip method:

[0151] Weigh 50g of Fe-Ce-Si-Ca master alloy produced by Baotou Steel Sanfeng Rare Earth Co., Ltd., put it into the water-cooled copper crucible of the vacuum quenching furnace, and adjust the position of the electrode so that it is in line with the Fe-Ce-Si-Ca in the crucible. The distance between the Ca intermediate alloy materials is 1.5mm, close the furnace door, the inlet and outlet, and the air release valve, and evacuate until the vacuum degree is higher than 5×10 -3 After Pa, wash the furnace with argon gas, then fill it with argon gas until the vacuum degree is 0.05 Pa, adjust the arc current to gradually increase to 600A after the arc is started, and melt the alloy in the crucible, and when the alloy is completely melted i...

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Abstract

The invention discloses a high-speed steel alloy casting process used for a roll, which belongs to a metal casting process. By first preparing a lamellar nano-crystalline rare earth ferrosilicon inoculant and a lamellar nano-crystalline iron boron refiner respectively by adopting a fast quenching and melt-spinning method, and then performing crystalline grain and microstructure refinement treatment on a high-speed steel alloy microstructure used for the roll by using an alterative consisting of the nano-crystalline rare earth ferrosilicon inoculant and the lamellar nano-crystalline iron boronrefiner, the process overcomes the defects in high-speed steel alloy casting, refines matrix crystalline grains thereof remarkably and breaks up a carbide, thereby remarkably improving comprehensive mechanical performance of a manufactured high-speed steel roll.

Description

technical field [0001] The technical solution of the invention relates to metal casting technology, in particular to the casting technology of high-speed steel alloy for rolls. Background technique [0002] It has become an important topic to develop new roll material and its manufacturing process to meet the needs of my country's steel rolling industry. [0003] High-speed steel rolls use high-carbon high-vanadium high-speed steel with high hardness, good wear resistance and red hardness as the working layer material of the roll, and use forged steel, cast steel or cast iron as the core material of the roll, which is compounded by metallurgical methods. into a new type of composite roll. This new composite roll meets the requirements of steel rolling with strength and toughness at the same time. It has good strength, toughness and wear resistance. At present, it is not only used in hot and cold plate and strip mills, but also used in bar, wire rod mills, roughing mills, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/56C21C7/04C21C7/06B22D1/00B22D11/16C21D9/38
Inventor 崔春翔刘双进戚玉敏梁敏祖宁
Owner HEBEI UNIV OF TECH