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Iron nickel chrome molybdenum base powder for laser cladding and method for preparing same

A powder material, laser cladding technology, applied in metal material coating process, coating and other directions, can solve the problem of low bonding strength, and achieve the effect of long corrosion resistance life, low preparation cost and simple process

Active Publication Date: 2012-11-14
北京国能德峰材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low bonding strength (generally less than 20MPa) of this kind of wear-resistant coating, its service life generally does not exceed 4500 hours

Method used

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  • Iron nickel chrome molybdenum base powder for laser cladding and method for preparing same
  • Iron nickel chrome molybdenum base powder for laser cladding and method for preparing same
  • Iron nickel chrome molybdenum base powder for laser cladding and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Preparation of a wear-resistant and corrosion-resistant cladding layer on the surface of the agitator blade

[0033] 1. Preparation of powder materials

[0034] 1. Preparation of powder raw materials: the weight percentage range of the powder raw materials is as follows:

[0035] Titanium powder (particle size-140+325 mesh, purity 99.5%): 12wt.%; graphite carbon powder (purity 99%): 3 wt.%; niobium carbide powder (particle size-140+325 mesh, purity 99.5%): 8 wt.%; iron-nickel-chromium-molybdenum alloy powder (grain size-140+325 mesh): balance; wherein, the composition of iron-nickel-chromium-molybdenum alloy powder is: nickel: 20wt.%, chromium: 23wt. %, molybdenum: 8wt.%, iron: balance.

[0036]Iron-nickel-chromium-molybdenum alloy powder is prepared by the existing mature gas atomization method.

[0037] 2. Mixing process of powder raw materials

[0038] (1) According to the various powder ratios described in step 1, weigh the various powders required fo...

Embodiment 2

[0051] Example 2: Preparation of wear-resistant and corrosion-resistant cladding layer on the surface of the impeller of the slurry circulation pump

[0052] 1. Preparation of powder materials

[0053] 1. Preparation of powder raw materials: the weight percentage range of the powder raw materials is as follows:

[0054] Titanium powder (particle size-140+325 mesh, purity 99.5%): 15 wt.%; graphite carbon powder (purity 99%): 3.7wt.%; niobium carbide (NbC) powder (particle size-140+325 mesh, purity 99.5 %): 10 wt.%; iron-nickel-chromium-molybdenum alloy powder (grain size -140+325 mesh): balance; among them, the composition of iron-nickel-chromium-molybdenum alloy powder is: nickel: 26wt.%, Chromium: 25wt.%, molybdenum: 10wt.%, iron: balance.

[0055] 2. Mixing process of powder raw materials

[0056] (1) According to the various powder ratios described in step 1, weigh the various powders required for the powder raw materials;

[0057] (2) Put the powder raw material into a...

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Abstract

The invention discloses an iron nickel chrome molybdenum base powder for laser cladding and a method for preparing the same, and belongs to the technical field of surface engineering. The powder comprises, 10-18wt.% of titanium powder, 2-4.5wt.% of graphite carbon powder, 6-15wt.% of carbonized niobium powder, and the balance iron-nickel-chrome-molybdenum alloy powder which comprises 20-26wt.% of nickel, 13-16wt.% of chromium, 5-15wt.% of molybdenum and the balance iron. The powder has the advantages that the powder is melted and mixed by using high energy density laser beams, an abrasion resistant and corrosion resistant cladding layer with an iron-nickel-chrome-molybdenum alloy serving as a continuous phase and a carbide ceramic as a reinforcing phase is formed on the surface of a steel matrix, the cladding layer and the matrix achieve metallurgical bonding and low dilution rate. A method for preparing the powder has the advantages of being low in manufacture cost, long in service life of the abrasion resistant and corrosion resistant cladding layer, simple in technology, and capable of elongating the abrasion resistant and corrosion resistant life of components of stirrers, slurry circulating pumps, sea water circulating pumps and the like.

Description

technical field [0001] The invention belongs to the technical field of surface engineering, and in particular provides an iron-nickel-chromium-molybdenum-based powder material for laser cladding and a preparation method thereof. Background technique [0002] The agitator and the slurry circulation pump are one of the key equipment in the desulfurization system of the thermal power plant, and their wear and corrosion problems are important reasons that affect the safe and economical operation of the desulfurization system. [0003] The agitator consists of a stirring mechanism, a shaft and a drive system equipped with a drive motor. The agitator generally uses three-blade propeller blades, and the blade material is stainless steel. The function of installing the agitator is: (1) prevent solid particles from settling in the slurry tank, and ensure that the slurry can be evenly transported to the next process; (2) strengthen the diffusion of oxidizing air, and promote the oxida...

Claims

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Application Information

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IPC IPC(8): B22F1/00C23C24/10
Inventor 刘宗德刘再德李建平王永田李新芷任威宇钟成圆
Owner 北京国能德峰材料技术有限公司
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