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High-wear-resistant shot blasting machine blade and preparation method thereof

A shot blasting machine blade, high wear-resistant technology, applied in the direction of rotor blades, abrasives, impellers, etc., can solve the problems of increased production costs, shot blasting machine blade breakage, and reduced product qualification rate, so as to increase service life and surface hardness Improvement, high impact toughness effect

Inactive Publication Date: 2021-10-08
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the blades of shot blasting machines at home and abroad are integrally cast, and the blades of shot blasting machines are prone to defects such as cracks, microporosity, pores, and grain boundary inclusions during the casting process, which reduces the qualified rate of products; at the same time, shot blasting machines Under the repeated impact of the projectile, the blade first deforms the matrix tissue, and the matrix tissue on the surface produces a squeeze flow, and accelerates the deformation of the shot blasting machine blade and the loss of material under continuous wear. Due to repeated cyclic stress and The wear of the projectile, the accumulation of matrix damage, and finally even the breakage of the shot blasting machine blade
[0004] If the hardness and impact toughness of the entire shot blasting machine blade are improved, the production cost will be greatly increased

Method used

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  • High-wear-resistant shot blasting machine blade and preparation method thereof
  • High-wear-resistant shot blasting machine blade and preparation method thereof
  • High-wear-resistant shot blasting machine blade and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Adopt 500 kilograms of medium-frequency induction furnaces to smelt boron white cast iron of the present invention, and its manufacturing process steps are:

[0040] 1) Take scrap steel, ferrochromium, ferromanganese, ferrosilicon and pure iron in the proportion of 41.0%: 8.2%: 1.0%: 1.8%: 47.7%, mix them and fill them into a melting furnace, and heat until they melt;

[0041] 2) Add 0.3% bulk iron boron with a size less than 10mm in the furnace;

[0042] 3) Raise the temperature of the smelting furnace to 1550°C, add deoxidizer aluminum wire, and remove impurities after the furnace charge is completely melted;

[0043] 4) When the temperature of the molten steel reaches 1450°C, use the cast shell pouring system to cast and form (inner shell raw material selection: 5.0% water glass, 6.0% graphite powder, 6.0% high chromium cast iron powder, 5% polyvinyl alcohol, the rest It is silica sand; the raw material of the outer casing is water glass and silica sand with a mass ...

Embodiment 2

[0047] Adopt 500 kilograms of medium-frequency induction furnaces to smelt boron white cast iron of the present invention, and its manufacturing process steps are:

[0048]1) Take scrap steel, ferrochromium, ferromanganese, ferrosilicon and pure iron in proportions of 42.0%: 8.5%: 1.2%: 2.5%: 45.8%, mix them, fill them into a smelting furnace, and heat until they melt;

[0049] 2) Add 0.3% bulk iron boron with a size less than 10mm in the furnace;

[0050] 3) Raise the temperature of the smelting furnace to 1550°C, add deoxidizer aluminum wire, and remove impurities after the furnace charge is completely melted;

[0051] 4) When the temperature of the molten steel reaches 1450°C, use the cast shell pouring system for casting (inner shell raw material selection: 6.0% water glass, 7.0% graphite powder, 7.0% high chromium cast iron powder, 7% polyvinyl alcohol, the rest It is silica sand; the raw material of the outer casing is water glass and silica sand with a mass ratio of 1:...

Embodiment 3

[0055] Adopt 500 kilograms of medium-frequency induction furnaces to smelt boron white cast iron of the present invention, and its manufacturing process steps are:

[0056] 1) Take scrap steel, ferrochromium, ferromanganese, ferrosilicon and pure iron in proportions of 44.0%: 9.0%: 1.5%: 3.0%: 42.2%, mix them and fill them into a smelting furnace, and heat until they melt;

[0057] 2) Add 0.3% boron alloy with a size smaller than 10mm in the furnace;

[0058] 3) Raise the temperature of the smelting furnace to 1550°C, add deoxidizer aluminum wire, and remove impurities after the furnace charge is completely melted;

[0059] 4) When the temperature of the molten steel reaches 1450°C, use the cast shell pouring system to cast and form (inner shell raw materials selection: 5.0% water glass, 8.0% graphite powder, 10.0% high chromium cast iron powder, 10% polyvinyl alcohol, the rest It is silica sand; the raw material of the outer casing is water glass and silica sand with a mass ...

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Abstract

The invention belongs to the technical field of wear-resistant shot blasting machine blades, and particularly relates to a high-wear-resistant shot blasting machine blade and a preparation method thereof. The high-wear-resistant shot blasting machine blade comprises a cast iron layer and a surface wear-resistant layer, and chemical components of the cast iron layer comprise, by mass percent, 1%-2% of C, 0.5%-1% of Si, 0.5%-1% of Mn, 7%-12% of Cr, 0.2%-0.5% of B and the balance Fe; and chemical components of the surface wear-resistant layer comprise, by mass percent, 3.5%-4.5% of C, 0.5%-1% of Si, 0.5%-1% of Mn, 6%-22% of Cr, 0.2%-0.5% of B and the balance Fe. In order to save the cost, the shot blasting machine blade adopts surface carburization and chromizing treatment, and adopts a casting mold shell casting system for casting molding, the production efficiency can be improved, and the economic benefit can be increased. The high-wear-resistant shot blasting machine blade has the characteristics of high strength, impact toughness and the like, the service life of a wear-resistant component can be remarkably prolonged, and the service cycle of the shot blasting machine blade is longer.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant shot blasting machine blades, and in particular relates to a high wear-resistant shot blasting machine blade and a preparation method thereof. Background technique [0002] Shot blasting machine is a processing technology that impacts steel sand and steel shots on the surface of material objects by high-speed throwing of steel sand and steel shots through a shot blasting machine. It is faster and more efficient than other surface treatment techniques and can be used for part retention or post-stamping casting processes. The application of shot blasting machines at home and abroad is becoming more and more extensive, and it is not limited to the surface treatment of traditional parts. Shot blasting machines have been widely used to maintain and repair highways, steel bridges, and airport pavements. The shot blasting machine is mainly composed of impeller, directional sleeve, shot blasting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/32C22C38/02C22C38/04C22C38/36C22C37/10C22C37/06C23C12/02B22D27/18C22C33/06C21D1/18B22C9/02B22C1/00B24C5/06
CPCC22C38/32C22C38/02C22C38/04C22C38/36C22C37/10C22C37/06C23C12/02B22D27/18C22C33/06C21D1/18B22C9/02B22C1/00C22C33/006B24C5/062Y02P10/20
Inventor 易艳良李卫涂小慧陈鹏
Owner JINAN UNIVERSITY