Surface gradient protective coating and its preparing method

A protective coating and surface gradient technology, applied in the field of surface gradient protective coating and its preparation, can solve the problems of small difference in thermal expansion coefficient, difficulty in spraying materials, unfavorable practical application, etc., achieve good matching, and improve stress crack resistance and peeling ability, excellent corrosion resistance of high aluminum zinc melt

Active Publication Date: 2009-01-21
SHANGHAI BAOSTEEL EQUIP MAINTENANCE CO LTD
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, it is extremely difficult to select a spraying material that has good matching properties such as good bonding strength and small difference in thermal expansion coefficient with both the protective coating and the base material. In this case, for pure ceramic phase materials (such as aluminum Magnesium spinel) especially
However, if an intermediate buffer coating with more than three layers is used, the process is extremely complicated, the production cycle is long, the quality is difficult to control, and the economic cost is high, which is not conducive to practical application.
Therefore, for the surface protective coating of sinking rolls and stabilizing rolls for hot-dip high-aluminum zinc, there has not been a very effective solution so far.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surface gradient protective coating and its preparing method
  • Surface gradient protective coating and its preparing method
  • Surface gradient protective coating and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] The sample size is Φ70mm×300mm, and the material is steel 316L for hot-dip high-aluminum-zinc sinking roller / stabilizing roller. As the thermal expansion coefficient of the MoB / CoCr surface protection working coating is smaller, the poorer the matching between the coating and the roll material is, and the coating is more likely to crack and peel off; for this reason, the thermal expansion coefficient N is selected in this case MoB / CoCr =9.0×10 -6 / K's MoB / CoCr cermet is used as a surface protection working coating material. When using a buffer transition layer, N 0 = 1 2 ( N 316 L + N MoB / CoCr ) ≈ 14.0 × 10 - ...

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
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to surface gradient protecting coat and manufacturing method. It uses protecting coat system design to adjust MoB and CoCr basis component content proportion without changing its essential component, make damping transition thermal spray coating material, and gain gradient thermal spray coating. The gradient protecting coat of the invention can obviously increase coating anti thermal shock property, and corrosion-resisting properties. Thus it can be used as surface protecting coat for the immerged and stable rollers used in continuous dip coating high aluminum zinc production line.

Description

Technical field [0001] The invention relates to a surface gradient protective coating and a preparation method thereof, in particular to a MoB / CoCr surface gradient protective thermal spray coating and a manufacturing method thereof, which can be used for (but not limited to) continuous hot-dip high-aluminum-zinc production lines for sinking Surface protective coating of roller and stabilizing roller. Background technique [0002] Hot-dip high-aluminum-zinc (containing 55% Al) coated steel sheet as a high value-added steel product has better mechanical properties and stronger oxidation resistance than hot-dip pure zinc and hot-dip low-aluminum-zinc coated steel sheets. And it has good paintability, processability and economy, especially excellent corrosion resistance; it has been widely used in the construction industry, household appliance industry, industrial instrument industry and automobile industry and other fields, and the market prospect is very broad. [0003] However, t...

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 Patents(China)
IPC IPC(8): C23C30/00C23C4/04
Inventor 毕刚谭兴海蒋振华
Owner SHANGHAI BAOSTEEL EQUIP MAINTENANCE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap