Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Corrosion-resistant composite for water turbine, and preparation method and application thereof

A composite material and anti-corrosion technology, applied in metal material coating process, coating, fusion spraying, etc., can solve problems such as shortened service life, low equipment operation efficiency, frequent overhaul, etc., and achieve excellent anti-corrosion performance , easy industrialization, and broad application prospects

Active Publication Date: 2019-09-17
HOHAI UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Technical problem to be solved: This application mainly proposes an anti-corrosion composite material for water turbines and its preparation method and application, and solves the technical problems in the prior art that cause low equipment operation efficiency, frequent overhaul, and shortened service life. , in the prepared coating, the borides synthesized in situ are uniformly distributed in the amorphous matrix, and the composite coating has high hardness and excellent wear resistance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of wear-resistant composite material for water turbine, the preparation method of described wear-resistant composite material for water turbine, comprises the steps:

[0027] The first step: according to the weight percentage of chemical composition 26wt% Cr, 5wt% B, 3wt% Si, 3wt% Cu, 5wt% Ni, 10wt% Mo, the balance is Fe to carry out batching, weigh low-carbon ferrochrome, high-carbon Ferrochrome, ferroboron, ferrosilicon, electrolytic copper, electrolytic nickel, ferromolybdenum and pure iron, according to the order of melting point from high to low and the principle that the materials containing elements that are easy to burn are added to the vacuum induction furnace in sequence, and then Raise the temperature to 2000°C at a rate of 10K / s, and keep it warm for 10 minutes to melt it completely;

[0028] Step 2: Carry out vacuum air atomization treatment on the molten liquid, the air atomization pressure is 3MPa, then dry at 80°C for 2h, and sieve the powder with...

Embodiment 2

[0033] A kind of wear-resistant composite material for water turbine, the preparation method of described wear-resistant composite material for water turbine, comprises the steps:

[0034] The first step: according to the weight percent of chemical composition: 26wt% Cr, 10wt% B, 3wt% Si, 3wt% Cu, 5wt% Ni, 10wt% Mo, the balance is Fe to carry out batching, takes low-carbon ferrochrome, high Carbon ferrochrome, ferroboron, ferrosilicon, electrolytic copper, electrolytic nickel, ferromolybdenum and pure iron, according to the order of melting point from high to low and the principle that the materials containing elements that are easy to burn are added into the vacuum induction induction furnace in turn, Then heat up to 2000°C at a rate of 10K / s, and keep it warm for 10 minutes to melt it all;

[0035]Step 2: Carry out vacuum air atomization treatment on the molten liquid, the air atomization pressure is 3MPa, then dry at 80°C for 2h, and sieve the powder with a particle size of...

Embodiment 3

[0040] A kind of wear-resistant composite material for water turbine, the preparation method of described wear-resistant composite material for water turbine, comprises the steps:

[0041] The first step: according to the weight percent of chemical composition: 26wt% Cr, 15wt% B, 3wt% Si, 3wt% Cu, 5wt% Ni, 10wt% Mo, the balance is Fe to carry out batching, weigh low-carbon ferrochrome, high Carbon ferrochromium, ferroboron, ferrosilicon, electrolytic copper, electrolytic nickel, ferromolybdenum and pure iron, according to the order of melting point from high to low and the principle that the materials containing elements that are easy to burn are added last into the vacuum induction induction furnace. Then heat up to 2000°C at a rate of 10K / s, and keep it warm for 10 minutes to melt it all;

[0042] Step 2: Carry out vacuum air atomization treatment on the molten liquid, the air atomization pressure is 3MPa, then dry at 80°C for 2h, and sieve the powder with a particle size of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

The application discloses a corrosion-resistant composite for a water turbine, and a preparation method and an application thereof. The corrosion-resistant composite for the water turbine is formed by compositing Fe-based amorphous material and in-situ synthesized boride, and consists of components by following specific weight percentage: 26wt% of Cr, 5-15wt% of B, 3wt% of Si, 3wt% of Cu, 5wt% of Ni, 10wt% of Mo and the balance Fe. The raw materials for preparing the corrosion-resistant composite for the water turbine are fed into a vacuum gas atomization furnace so as to be smelted and atomized, and amorphous material / boride composite powder is obtained after powder screening. When the amorphous material / boride composite powder is used for preparing a corrosion-resistant composite coating, the coating is prepared by adopting a hypersonic flame spraying technology. The corrosion-resistant composite for the water turbine can obtain the composite coating good in bonding strength with a base body, high in hardness, and excellent in corrosion resisting performance.

Description

technical field [0001] The invention belongs to the thermal spraying field of material processing engineering, and in particular relates to an anti-corrosion composite material used for water turbines and a preparation method and application thereof. Background technique [0002] A water turbine is a power machine that converts the energy of water flow into rotating mechanical energy, and is one of the main equipment of a hydropower station. During the operation of the turbine, the turbine blades, runner body, guide vane and other flow-passing components are often eroded by water and sand, resulting in the loss of metal on the surface, causing vibration and noise during the operation of the equipment, resulting in low operating efficiency of the equipment and major repairs. Frequent, shortened service life. The so-called abrasion refers to the damage phenomenon of materials under the joint action of cavitation erosion and sediment wear, which is inevitable in the working ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/03C23C4/129C23C4/06
CPCC22C1/03C22C30/00C22C33/06C22C38/34C22C38/42C22C38/44C22C38/54C23C4/06C23C4/129
Inventor 吴玉萍乔磊程杰洪晟
Owner HOHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com