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Powder used for laser-cladding zinc corrosion resistant cobalt-based alloy and preparation technology for modified layer

A technology of laser cladding and cobalt-based alloys, which is applied in the coating process of metal materials, coatings, etc., can solve problems such as inapplicability and corrosion of common alloys, achieve good industrial application prospects and economic benefits, inhibit corrosion, improve resistance The effect of wear and corrosion resistance

Active Publication Date: 2015-04-08
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary alloys are severely corroded in molten zinc and cannot be used at all. At present, materials with good corrosion resistance in molten zinc are mostly refractory pure cermets and brittle intermetallic compounds.

Method used

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  • Powder used for laser-cladding zinc corrosion resistant cobalt-based alloy and preparation technology for modified layer
  • Powder used for laser-cladding zinc corrosion resistant cobalt-based alloy and preparation technology for modified layer
  • Powder used for laser-cladding zinc corrosion resistant cobalt-based alloy and preparation technology for modified layer

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preparation example Construction

[0037] A method for preparing an intermetallic compound-enhanced zinc-corrosion-resistant cobalt-based alloy laser cladding layer on the surface of an iron-based alloy as described above, characterized in that the steps of the method are as follows:

[0038] S1. Weigh and mix Mo, Cr, Ni, Si, Fe, C, CeO according to the above ratio 2 , Co various powders, the mixed powder is ball milled or ground for 2-5 hours, and then the mixed powder is dried in a vacuum drying oven for 5-8 hours;

[0039] S2. The surface of the iron-based alloy base material is polished, sandblasted, cleaned and dried for later use, and the dried alloy powder is placed on the surface of the iron-based alloy base material. The thickness of the alloy powder is 1.5-3mm;

[0040] S3. Use a semiconductor laser with a wavelength of 980±10nm for single-pass and multi-pass laser irradiation treatment. The thickness of the alloy powder is preset at 1.5-3mm. After optimizing the process parameters, the laser power is...

Embodiment 1

[0042] Co-based alloy (2.5% Si) laser cladding layer enhanced by intermetallic compounds on the surface of 316L stainless steel.

[0043] According to the weight percentage, the powder adopts Mo 28.5, Cr 8.5, Ni 1.5, Fe 1.5, C 0.08, CeO 2 0.5, Si 2.5, the balance is a mixed powder of Co. The purity of various powders of the coating material is not lower than 99.9%, and the particle size of the coating alloy powder is 50-120 microns. The coated alloy powder needs to be ground and mixed in a planetary ball mill or a mortar for 2 to 5 hours, and then the uniformly mixed powder is dried in a vacuum drying oven for 2 to 8 hours.

[0044] The 316L stainless steel is processed into the required sample size by using a CNC wire cutting machine, and the surface to be laser treated is polished to 600 SiC metallographic sandpaper in turn, then sandblasted, ultrasonically cleaned with alcohol or acetone, and dried for later use.

[0045] The dried alloy powder is pre-placed on the surfac...

Embodiment 2

[0047] Co-based alloy (3.5% Si) laser cladding layer enhanced by intermetallic compounds on the surface of 316L stainless steel.

[0048] According to the weight percentage, the powder adopts Mo 28, Cr 8, Ni 1.4, Fe 1.4, C 0.07, CeO 2 0.5, Si 3.5, the balance is a mixed powder of Co. The purity of various powders of the coating material is not lower than 99.9%, and the particle size of the coating alloy powder is 50-120 microns. The coated alloy powder needs to be ground and mixed in a planetary ball mill or a mortar for 2 to 5 hours, and then the uniformly mixed powder is dried in a vacuum drying oven for 2 to 8 hours.

[0049] The 316L stainless steel is processed into the required sample size by using a CNC wire cutting machine, and the surface to be laser treated is sequentially polished to No. 600 SiC metallographic sandpaper, then sandblasted, ultrasonically cleaned with alcohol or acetone, and dried for later use.

[0050] The dried alloy powder is pre-placed on the s...

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Abstract

The invention discloses powder used for enhancing a zinc corrosion resistant cobalt-based alloy laser-cladding layer by preparing an intermetallic compound on surface of iron-base alloy and a preparation technology, belongs to the technical field of surface engineering, and provides a novel protection coating material and a preparation technology thereof to further improve high-temperature resistance abrasion and zinc corrosion performance of key components on a hot galvanizing production line of sink rolls, shaft sleeves, and the like, and prolong the service life of the components. The alloy powder is good in forming capacity, and high in bonding intensity with iron-base alloy base body; the laser-cladding layer is high in cost performance, excellent in abrasion resistant and zinc corrosion resistant performance, and suitable for preparation and re-preparation of laser surface protection coatings on components of the sink rolls, the shaft sleeves, and the like, and has a favorable application prospect and economic benefits.

Description

Technical field: [0001] The invention relates to a preparation process of powder and modified layer used for laser cladding of iron-based alloy surface intermetallic compound enhanced zinc corrosion resistance and cobalt-based alloy, which belongs to the technical field of surface engineering and is suitable for sinking rollers and shafts in continuous hot-dip galvanizing production lines of strip steel Surface protection and remanufacturing of important consumable parts such as sleeves. Background technique: [0002] Hot-dip galvanizing is one of the most widely used and cost-effective steel surface protection treatment methods in the world today. In recent years, my country's automobile, construction, household appliances and other industries have developed rapidly, and the demand for hot-dip galvanized products has increased year by year, and hot-dip galvanized technology has also shown a new development trend. Sinking rollers and shaft sleeves are important consumable p...

Claims

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Application Information

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IPC IPC(8): B22F1/00C22C19/07C23C24/10
Inventor 张春华刘杰张松吴臣亮贾永峰丁燕燕张昊天
Owner SHENYANG POLYTECHNIC UNIV
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