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Iron-based alloy powder for laser cladding and preparation method thereof

An iron-based alloy, laser cladding technology, applied in metal processing equipment, metal material coating technology, coating and other directions, can solve the problems of satellite ball, uneven powder particle size distribution, poor crack resistance of the cladding layer, etc. Achieve the effect of low oxygen content, high sphericity and uniform particle size distribution

Active Publication Date: 2021-07-20
BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention proposes an iron-based alloy powder for laser cladding and its preparation method to solve the problem of uneven particle size distribution of the powder produced by the existing technology, the existence of satellite balls, and the inability of the cladding layer to balance hardness and toughness, The problem of wear resistance and corrosion resistance, and solve the problem of poor crack resistance of large-area and thick-scale cladding layers

Method used

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  • Iron-based alloy powder for laser cladding and preparation method thereof
  • Iron-based alloy powder for laser cladding and preparation method thereof
  • Iron-based alloy powder for laser cladding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] A preparation method of iron-based alloy powder for laser cladding is as follows:

[0074] (1) Various raw materials required for powder making, such as micro-carbon ferrochrome, ferromolybdenum, silicon block, ferroboron, ferromanganese, ferrovanadium, nickel-chromium pre-alloyed powder, industrial pure iron, according to the iron-based alloy powder Element ratio for weighing;

[0075] (2) after smelting;

[0076] (3) Steel pouring; pour the molten steel with a superheat of ΔT≈300K into the preheated tundish; the temperature of the molten steel is 1550-1580°C, and the entire steel pouring process is controlled within 15 minutes;

[0077] (4) Inert gas protection atomization; the molten steel flows out from the leak nozzle of the tundish, and simultaneously adopts high-pressure inert gas to protect the outflowing molten steel from being oxidized, and sprays high-pressure inert gas to the outflowing molten steel flow, so that the The outflowing molten steel is atomized...

Embodiment 2-3 and comparative example 1-3

[0082]Examples 2-3 and Comparative Examples 1-3 are basically the same as Example 1, and all raw materials are weighed according to the element ratio of the iron-based alloy powder, after smelting, steel pouring, inert gas protection atomization, airflow classification and sieving , the content of each element of the iron-based alloy powder for laser cladding obtained in Example 2-3 and Comparative Example 1-3 is shown in Table 1 below.

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Abstract

The invention discloses iron-based alloy powder for laser cladding and a preparation method thereof. The powder comprises the following elements in percentage by weight: 0.05-0.2% of C, 10.6-15.6% of Cr, 1.5-2.5% of Ni, 10.5-15.4% of Mo, 0.4-0.6% of Mn, 0.9-1.2% of B, 0.8-1.0% of Si, 2.9-4.2% of V, and the balance of Fe and inevitable impurities. The preparation method comprises the steps of raw material weighing, smelting, steel casting, inert gas shielding atomization, airflow classification, screening and the like. The alloy powder prepared through the preparation method has excellent hardness, crack resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the field of laser cladding, and in particular relates to an iron-based alloy powder for laser cladding and a preparation method thereof. Background technique [0002] Laser cladding refers to the use of different feeding methods (prefabrication method and synchronous powder feeding method) to melt it and a thin layer on the surface of the substrate at the same time through laser irradiation, and to form a very low dilution after rapid solidification, forming a metallurgical bond with the substrate. The surface coating is used to modify and repair the surface of the substrate. [0003] At present, the corrosion-resistant and wear-resistant coatings of parts are mainly repaired by hard chrome plating, thermal spraying or other surfacing techniques. However, the application of these technologies will gradually be replaced due to environmental, health and other issues. Since September 2017, chromium (VI) coatings have to undergo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C38/54C22C38/46C22C38/02C22C38/04C23C24/10B22F9/08B22F1/00C22C33/06
CPCC22C38/44C22C38/54C22C38/46C22C38/02C22C38/04C23C24/103B22F9/082C22C33/06B22F2009/0844B22F2009/0896B22F2009/0848B22F1/065
Inventor 王旭于月光杜开平马尧章德铭杜倩
Owner BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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