Iron base rare earth high chromium steel impellor blade

An impeller blade, rare earth and high chromium technology, applied in liquid fuel engines, mechanical equipment, pumps, etc., can solve the problems of erosion resistance, poor wear resistance, large shutdown loss, and short service life, and achieve wear resistance. Excellent, reducing the number of replacements, the effect of excellent overall performance

Inactive Publication Date: 2005-11-09
寇生瑞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the material of the front and rear discs is the same as the blades, it is 16Mn plate. This material is low carbon, low manganese, and has excellent welding performance, but its erosion resistance and wear resistance are poor, and its service life is very short, resulting in the overall replacement of the impeller, blade replacement, Or blade surfacing repair is very complicated, labor-intensive, time-consuming, labor-intensive, high cost, and loss of shutdown is large, so it brings very large economic losses to the majority of enterprises using various impellers

Method used

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  • Iron base rare earth high chromium steel impellor blade
  • Iron base rare earth high chromium steel impellor blade

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Experimental program
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Effect test

Embodiment 1

[0015] The present invention includes a front disk reinforcement ring 1, a front disk 2, blades 3, a rear disk 4, and a hub 5. The impeller blade 3 is a dual-phase structure in which austenite, ferrite, and carbide coexist in the as-cast state, and its composition The percentage by weight is: C: 0.3%, Cr: 17-26%, Ni: 2-6%, Si: 0.40-1.0%, Mn: 0.40-1.0%, S≤0.04%, P≤0.04%, the present invention The impeller blade adopts a new steel type, which does not contain molybdenum and vanadium in the composition, so that the alloy of the impeller blade obtains a dual-phase structure in which austenite, ferrite, and carbide coexist. # Rare earth ferrosilicon alloy processing, the rest is iron and impurities usually formed under smelting conditions. It has good welding performance, especially after the micro-chemical treatment of rare earth, the melting point of manganese sulfide without adding rare earth is 800°C, and the melting point of rare earth sulfide after adding rare earth is increa...

Embodiment 2

[0017] The present invention includes a front disk reinforcement ring 1, a front disk 2, blades 3, a rear disk 4, and a hub 5. The impeller blade 3 is a dual-phase structure in which austenite, ferrite, and carbide coexist in the as-cast state, and its composition The percentage by weight is: C: 0.35%, Cr: 18-24%, Ni: 3-4%, Si: 0.4-0.70%, Mn: 0.40-0.70%, S<=0.025%, P<=0.025%

[0018] Add 0.021-0.3% Baotou 1 to the ladle when it comes out of the furnace # Rare earth ferrosilicon alloy processing, the rest is iron and impurities usually formed under smelting conditions.

[0019] The smelting is smelting in a non-iron core, non-vacuum intermediate frequency induction furnace, using high-quality furnace materials and alloy materials, low-temperature desulfurization, and a slag ratio of 4% during smelting; high-temperature deoxidation during molten steel refining, using CaSi deoxidizer, and diffusion deoxidation with 0.1 % calcium silicate powder, 0.1% calcium silicate block for p...

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Abstract

A blade for the blade wheel of blower is made of the Fe-based high-Cr RE steel, which contains proportionally C, Cr, Ni, Si, Mn, S, P, Fe and RE-ferrosilicon alloy, and features that the austenite, ferrite and carbonide coexist in it.

Description

1. Technical field [0001] The invention relates to a novel iron-based rare-earth high-chromium steel impeller blade, in particular to an impeller blade that is resistant to erosion, abrasion and weldable for stress-bearing parts in induced draft fans, blowers and powder discharge machines. 2. Background technology [0002] The impeller blades are the key vulnerable parts. At present, the blades of the impellers of the general induced draft fan, blower fan, and powder exhaust machine in China are made of traditional 16Mn plates. After cutting, planing, and pressing, they are welded between the front and rear plates and connected. Front and rear discs. Because the material of the front and rear discs is the same as the blades, it is 16Mn plate. This material is low carbon, low manganese, and has excellent welding performance, but its erosion resistance and wear resistance are poor, and its service life is very short, resulting in the overall replacement of the impeller, blade ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/40
Inventor 寇江明寇国珍崔燕寇生瑞
Owner 寇生瑞
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