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Laser cladding rare-earth modified iron-based ceramic composite long-service-life high-wear-resistance corrosion-resistant marine equipment piston rod coating and preparation process thereof

A technology of ceramic composite and rare earth modification, which is applied in the coating process of metal materials, piston rods, coatings, etc., can solve the problems of hoisting and closing equipment stuck, short life of piston rods, corrosion and expansion of coatings, etc., and achieve stable performance , low production cost, good corrosion resistance

Inactive Publication Date: 2019-10-11
MIN OF WATER RESOURCES HANGZHOU MACHINERY DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Now the sealing agent for the piston rod coating of marine engineering equipment is used, no matter it is organic or inorganic material is used as the sealing agent, due to seawater erosion, sea sand wear, etc., the service life of these is very short in actual engineering, such as a coastal university in Zhejiang The piston rod coating used on the gate has been sealed for more than 2 years, and problems have occurred, resulting in corrosion, expansion or peeling of the coating, which in turn caused the hoisting equipment to be stuck and unable to operate, posing a serious safety hazard
[0005] The piston rod life of existing marine engineering equipment is also relatively short. Once a problem occurs, it will lead to overhaul of the unit or cause a safety accident. Therefore, how to prepare a piston rod coating that can be used for a longer period of time is a key technical problem that needs to be solved urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Laser cladding rare earth modified iron-based ceramic composite long-life high wear-resistant corrosion-resistant marine equipment piston rod coating composition: Cr: 16.5%, Mn: 1.5%, Mo: 7%, W: 1.5%, B: 13.5% , C: 3%, Si: 2%, Al 2 o 3 :8.5%, La 2 o 3 : 0.5%, Fe: balance.

[0029] The above powders were ball milled and mixed for 20 hours to obtain a uniform composite powder.

[0030] Lay the composite powder flat and put it in an incubator for drying. The holding temperature is 100°C and the drying time is 1 hour.

[0031] Clean the surface of the 2205 stainless steel spray-coated substrate with acetone, and dry it in an incubator at 40°C to remove oil stains on the surface.

[0032] The 2205 stainless steel was heated to 100°C synchronously by electromagnetic induction.

[0033] Laser cladding is performed on the composite powder on the surface of the substrate, laser power: 1.5KW, cladding speed: 8mm / s, lap width: 2.2mm, powder feeding rate: 0.8r / min.

[0034] ...

Embodiment 2

[0036] Laser cladding rare earth modified iron-based ceramic composite long-life high wear-resistant corrosion-resistant marine equipment piston rod coating composition: Cr: 16.5%, Mn: 1.5%, Mo: 7%, W: 1.5%, B: 13.5% , C: 3%, Si: 2%, Cr 2 o 3 :8.5%, La 2 o 3 : 0.5%, Fe: balance.

[0037] The above powders were ball milled and mixed for 30 hours to obtain a uniform composite powder.

[0038] Lay the composite powder flat and put it in an incubator for drying. The holding temperature is 100°C and the drying time is 1 hour.

[0039] Clean the surface of the Q355 steel sprayed substrate with acetone, and dry it in an incubator at 40°C to remove oil stains on the surface.

[0040] The Q355 steel was heated to 100 °C synchronously by electromagnetic induction.

[0041]Laser cladding is performed on the composite powder on the surface of the substrate, laser power: 2.0KW, cladding speed: 10mm / s, lap width: 2.5mm, powder feeding rate: 1.0r / min.

[0042] The thickness of the coa...

Embodiment 3

[0044] Laser cladding rare earth modified iron-based ceramic composite long-life high wear-resistant corrosion-resistant marine equipment piston rod coating composition: Cr: 18.5%, Mn: 2%, Mo: 6%, W: 2%, B: 11.5% , C: 4%, Si: 1.5%, Al 2 o 3 :9.5%, CeO 2 : 1%, Fe: balance.

[0045] The above powders were ball milled and mixed for 23 hours to obtain a uniform composite powder.

[0046] Lay the composite powder flat and put it in an incubator for drying. The holding temperature is 100°C and the drying time is 1 hour.

[0047] Clean the surface of the 2205 stainless steel spray-coated substrate with acetone, and dry it in an incubator at 40°C to remove oil stains on the surface.

[0048] The 2205 stainless steel was heated to 100°C synchronously by electromagnetic induction.

[0049] Laser cladding is performed on the composite powder on the surface of the substrate, laser power: 2.5KW, cladding speed: 10mm / s, lap width: 2.8mm, powder feeding rate: 1.2r / min.

[0050] The thi...

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Abstract

The invention discloses a laser cladding rare-earth modified iron-based ceramic composite long-service-life high-wear-resistance corrosion-resistant marine equipment piston rod coating and a preparation process thereof. The coating comprises the following components of, in percentage by mass, 15%-19% of Cr, 1%-2% of Mn, 5%-8% of Mo, 1%-2% of W, 11%-16% of B, 2%-5% of C, 1%-3% of Si, 8%-10% of ceramic powder, 0.5%-2% of rare earth oxide powder and the balance Fe. By taking the coating as a cladding material, laser cladding is adopted to obtain the laser cladding rare-earth modified iron-based ceramic composite long-service-life high-wear-resistance corrosion-resistant marine equipment piston rod coating, the coating has excellent wear resistance and corrosion resistance, the coating is highin surface hardness, is strong in binding force with a matrix material, and can bear large loads, and the problems that an existing coating is easy to peel off and corrode and is used in the wearingenvironment are effectively solved; and the coating has the advantages that the production cost is low, the preparation method and process is stable, performance is stable, and the coating is suitablefor large-scale application on fresh water and marine equipment facilities.

Description

technical field [0001] The invention relates to a piston rod coating for marine engineering equipment, in particular to a laser cladding rare earth modified iron-based ceramic composite long-life, high wear-resistant and corrosion-resistant piston rod coating for marine engineering equipment and a preparation process. Background technique [0002] The piston rod of the hoist has served in a humid environment for a long time. The piston rod in the hoist not only bears the abrasion of sand particles and other sundries adsorbed on the surface of the piston rod, but also bears the corrosion of the humid environment and various polluted environments. Serious It will affect the performance of the piston rod and shorten its service life, seriously affecting the reliability and stability of the piston rod operation. The safety, reliability and stability of piston rod operation are very important, which seriously affects people's property and life safety. Therefore, it is necessary ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/02C22C38/04C22C38/22C22C38/32C22C38/34C22C38/36C22C38/38F16J7/00
CPCC22C38/02C22C38/04C22C38/22C22C38/32C22C38/34C22C38/36C22C38/38C23C24/103F16J7/00
Inventor 陈小明伏利赵坚刘德有刘伟毛鹏展
Owner MIN OF WATER RESOURCES HANGZHOU MACHINERY DESIGN INST
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