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Composition, coating and preparation method of nickel-based anti-wear and corrosion-resistant coating for marine hydraulic piston rod

A technology of hydraulic piston and composition, which is applied in the direction of coating, metal material coating process, etc., can solve problems such as corrosion, and achieve the effects of low dilution rate, excellent corrosion resistance, good corrosion resistance and wear resistance

Active Publication Date: 2020-10-16
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

[0004] Aiming at the problems existing in the existing marine piston rod corrosion and wear protection coating technology, the present invention provides a nickel-based anti-wear and corrosion resistant coating formulation, coating and preparation method for marine hydraulic piston rods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Coating formula composition and ratio

[0026] NiCrBSi alloy powder with a particle size of 45~125μm (the chemical composition is based on mass percentage: C0.45%, B2.3%, Si3.9%, Cr11.0%, Fe2.9%, Ni balance), nano-oxidized Cerium rare earth modifier (CeO 2 , purity ≥ 99%, particle size 40-90nm) and micro-nano metal tantalum powder (Ta, purity ≥ 99.99%, particle size 80-200nm) are mixed. Its mass percentage is as follows: NiCrBSi alloy: 88%, micro-nano metal Ta powder: 10%, CeO 2 Nano rare earth oxide powder: 2%. and mixed in a ball mill for 45 hours to obtain a uniform composite powder. The composite powder was placed in a drying oven and dried at 100°C for 2 hours before use.

[0027] (2) Piston rod surface pretreatment

[0028] Clamp the piston rod made of 45 steel to the horizontal turntable, degrease, decontaminate and derust the surface of the piston rod, and clean it with alcohol or acetone; heat the piston rod to 100°C with an induction heater.

[0029]...

Embodiment 2

[0035] (1) Coating formula composition and ratio

[0036] NiCrBSi alloy powder with a particle size of 45~125μm (the chemical composition is based on mass percentage: C0.45%, B2.3%, Si3.9%, Cr11.0%, Fe2.9%, Ni balance), nano-oxidized Cerium rare earth modifier (CeO 2 , purity ≥99%) and micro-nano metal tantalum powder (Ta, purity ≥99.99%) are mixed. Its mass percentage is as follows: NiCrBSi alloy: 94%, micro-nano metal Ta powder: 5%, CeO 2 Nano rare earth oxide powder: 1%. and mixed in a ball mill for 30 hours to obtain a uniform composite powder. The composite powder was placed in a drying oven and dried at 120°C for 1 hour before use.

[0037] (2) Piston rod surface pretreatment

[0038] Clamp the piston rod made of Q345 steel onto a horizontal turntable, degrease, decontaminate, and derust the surface of the piston rod, and clean it with alcohol or acetone; heat the piston rod to 100°C with an induction heater.

[0039] (3) Preparation of nickel-based anti-wear and c...

Embodiment 3

[0045] (1) Coating formula composition and ratio

[0046] NiCrBSi alloy powder with a particle size of 45~125μm (the chemical composition is based on mass percentage: C0.45%, B2.3%, Si3.9%, Cr11.0%, Fe2.9%, Ni balance), nano-oxidized Cerium rare earth modifier (CeO 2 , purity ≥99%) and micro-nano metal tantalum powder (Ta, purity ≥99.99%) are mixed. Its mass percentage is as follows: NiCrBSi alloy: 85.2%, micro-nano metal Ta powder: 6%, CeO 2 Nano rare earth oxide powder: 0.8%. and mixed in a ball mill for 55 hours to obtain a uniform composite powder. The composite powder was placed in a drying oven and dried at 150°C for 2.5 hours before use.

[0047](2) Piston rod surface pretreatment

[0048] Clamp the piston rod made of 2205 stainless steel to the horizontal turntable, degrease, decontaminate, and derust the surface of the piston rod, and clean it with alcohol or acetone; heat the piston rod to 100°C with an induction heater.

[0049] (3) Preparation of nickel-based...

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PUM

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Abstract

The invention discloses a nickel-base wear-resistant anti-corrosion coating formula for a maritime work hydraulic piston rod, a coating, and a preparation method thereof. The coating formula is prepared from the components in mass ratio: 85 to 95 percent of NiCrBSi alloy, 1 to 15 percent of metal Ta powder, and 0.2 to 3 percent of CeO2 rare earth oxide powder. According to the formula, the materials are laser-cladded, a powder formula is sequentially fed to the surface of a steel base material of the treated piston rod through an automatic powder feeder, meanwhile, powder is cladded on the surface of the piston rod through laser radiation, and finally the coating with the thickness being 0.5 to 2.0mm is formed; and the coating is uniform and compact, is in metallurgical bonding with the base material, is low in dilution rate, and has excellent corrosion resistance, wear resistance and impact toughness, so that the service life of the maritime work hydraulic piston rod can be remarkablyprolonged.

Description

technical field [0001] The invention relates to a nickel-based anti-wear and corrosion-resistant coating formula, coating and preparation method for marine hydraulic piston rods. The coating is applied to the field of anti-wear and corrosion protection of hydraulic piston rod surfaces in marine engineering and coastal water conservancy projects . Background technique [0002] The piston rod is one of the key core components of the gate hydraulic hoist for marine engineering and coastal water conservancy projects. Its base material is mainly carbon steel, alloy steel or quenched and tempered steel, and a small amount is stainless steel. The piston rod has been severely corroded due to long-term exposure to harsh environments such as corrosive seawater, humid atmosphere, and sun exposure. In addition, the high-speed flowing seawater and the entrained sand and gravel in the strong tide area have strong erosion and wear on the surface of the piston rod, causing the piston rod to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C22C19/05
CPCC22C19/058C23C24/103
Inventor 陈小明张磊刘德有伏利赵坚毛鹏展刘伟
Owner MIN OF WATER RESOURCES HANGZHOU MACHINERY DESIGN INST