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A kind of centrifugal casting stirring impeller and method

A stirring impeller and centrifugal casting technology, applied in the field of impeller production, can solve the problems of poor wear resistance, short service life, low strength, etc., and achieve the effects of simplified casting process, low cost and high productivity

Active Publication Date: 2020-05-22
马鞍山市庄芝耐磨合金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problems of poor wear resistance and low strength of existing stirring impellers, resulting in short service life, the present invention provides a centrifugal casting stirring impeller. By adopting centrifugal casting, the blades have high wear resistance, and the hub Has high strength, prolongs the service life of the mixing impeller

Method used

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  • A kind of centrifugal casting stirring impeller and method
  • A kind of centrifugal casting stirring impeller and method
  • A kind of centrifugal casting stirring impeller and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The method for the centrifugal casting stirring impeller of the present embodiment comprises the following specific steps:

[0066] S101, making mould: making the stirring impeller centrifugal rotation mold, the centrifugal rotation mold comprises a left template and a right template (the structure of this part and the mold of the prior art can be the same structure, but not as the focus of the present invention), the left template Fasten with the right template to form a molding cavity, the shape of the molding cavity is consistent with the outer contour of the stirring impeller, the reserved shrinkage is 3mm, and the dimensional accuracy is ±0.02mm;

[0067] S102. Alloy melting

[0068] 1) Select the first graphite crucible to melt the wheel 100 alloy at a temperature of 1600°C. The chemical composition of the wheel 100 alloy is shown in Table 1. The melt in the graphite crucible is stirred for 5 minutes and then degassed and refined to form the wheel 100. Alloy melt...

Embodiment 2

[0084] The method for the centrifugal casting stirring impeller of the present embodiment, concrete steps are basically consistent with embodiment 1, difference is:

[0085] S101. The reserved shrinkage of the stirring impeller centrifugal rotating mold is 2mm, and the dimensional accuracy is ±0.02mm;

[0086] S102. Alloy melting

[0087] 1) Select the first graphite crucible to melt the wheel 100 alloy at a temperature of 1560°C. The chemical composition of the wheel 100 alloy is shown in Table 1. The melt in the graphite crucible is stirred for 3 minutes and then degassed and refined to form the wheel 100. Alloy melt;

[0088] 2) Select the second graphite crucible to melt the hub 200 alloy at a temperature of 1600 ° C. The chemical composition of the hub 200 alloy is shown in Table 2. The melt in the graphite crucible is stirred for 3 minutes and then degassed and refined to form the hub 200 alloy melt;

[0089] S103. Centrifugal casting: use a horizontal centrifuge, plac...

Embodiment 3

[0096] The method for the centrifugal casting stirring impeller of the present embodiment, concrete steps are basically consistent with embodiment 1, difference is:

[0097] S101. The reserved shrinkage of the stirring impeller centrifugal rotating mold is 2.5mm, and the dimensional accuracy is ±0.02mm;

[0098] S102. Alloy melting

[0099] 1) Select the first graphite crucible to melt the wheel 100 alloy at a temperature of 1580°C. The chemical composition of the wheel 100 alloy is shown in Table 1. The melt in the graphite crucible is stirred for 1 minute and then degassed and refined to form the wheel 100. Alloy melt;

[0100] 2) Select the second graphite crucible to melt the hub 200 alloy at a temperature of 1560 ° C. The chemical composition of the hub 200 alloy is shown in Table 2. The melt in the graphite crucible is stirred for 3 minutes and then degassed and refined to form the hub 200 alloy melt;

[0101] S103. Centrifugal casting: use a horizontal centrifuge, pla...

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Abstract

The invention discloses a centrifugally-cast stirring impeller and a method, and belongs to the technical field of impeller production. A plate of the impeller is prepared from chemical components bymass: 2.3-3.0% of C, smaller than or equal to 1.0% of Si, 0.5-1.0% of Mn, 17-23% of Cr, 0.3-0.8% of Mo, smaller than or equal to 0.035% of P, smaller than or equal to 0.06% of S, 0-1.5% of Ni, 0-1.0%of Co, 0-2.0% of Cu and the balance Fe and inevitable impurities. A hub is prepared from chemical components by mass: 0.3-0.4% of C, 0.6-0.9% of Si, 0.9-1.2% of Mn, 1.8-2.2% of Cr, 0.3-0.8% of Mo, smaller than or equal to 0.035% of P, smaller than or equal to 0.035% of S, 1.6-2.0% of Ni, 0.3-0.8% of Co and the balance Fe and inevitable impurities.

Description

technical field [0001] The invention belongs to the technical field of impeller production, and more specifically relates to a centrifugal casting stirring impeller and a method thereof. Background technique [0002] Composition of mixing impeller: mainly composed of hub and disc, it is a high-speed mixing and mixing part of the powder mixing machine. Its working principle: the hub and the wheel are combined into a whole by welding or integral casting, assembled on the high-speed rotating shaft of the mixing machine, and rotate with the shaft to stir and extrude the mixed powder (such as cement, slag, lime, Refractory materials, etc.), mainly used in brick making machinery and paving machinery, etc. The diameter of the stirring impeller is 500-800mm, the mass of the hub accounts for 80-81% of the total mass of the impeller, and the mass of the blades accounts for 19-20% of the total mass of the impeller. [0003] At present, the manufacturing methods of stirring impellers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/56C22C38/52C22C38/50C22C38/48C22C38/44C22C38/42C22C38/04C22C38/02C22C33/04B22D13/10B22D13/00
CPCB22D13/00B22D13/101C22C33/04C22C38/02C22C38/04C22C38/42C22C38/44C22C38/48C22C38/50C22C38/52C22C38/56
Inventor 周明道韦涛周华建
Owner 马鞍山市庄芝耐磨合金有限公司
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