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Wearable papermaking coating scraper

A scraper and coating technology, applied in scraper, papermaking, paper machine, etc., can solve the problems of mismatching mechanical properties between ceramic coating and scraper substrate, difficulties in spraying and grinding, and reduced scraper service life, etc., to achieve manufacturability Effects of improving, improving coating performance, and increasing bonding strength

Inactive Publication Date: 2008-05-14
SHANDONG UNIV OF SCI & TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

When used in coating production, it can improve coating quality, paper surface performance and printing characteristics, and paper gloss, but there are also shortcomings: first, the production cost is high, and the melting point of ceramic materials is high. Spraying and grinding are difficult. Secondly, the mechanical properties of the ceramic coating and the scraper substrate do not match. The coating is easy to partially fall off during use, which reduces the service life of the scraper.

Method used

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  • Wearable papermaking coating scraper

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Embodiment Construction

[0011] The following is to obtain NiCr alloy-NiAl intermetallic compound / Al on the steel scraper 2 o 3 The ceramic composite coating is taken as an example to describe the implementation process of this application.

[0012] 1. Clean the surface of the steel scraper base 3 and sandblast to form an active metal surface. The sandblasting sand particle size is 25-35 mesh, the sandblasting air pressure is 0.5-0.6MPa, the sandblasting distance is 10-15mm, and the surface after sandblasting Dust.

[0013] 2. Plasma spray NiCr alloy coating on the active metal surface as transition layer 2; spraying distance 150-200mm, current 450A, argon gas flow rate 1200L / h, nitrogen gas flow rate 1000L / h, coating thickness 0.05mm.

[0014] 3. Plasma spray NiAl / Al on the surface of NiCr alloy coating 2 o 3 The composite material powder is used as the working layer 1; the spraying distance is 150-200mm, the current is 500A, the flow rate of argon gas is 1500L / h, the flow rate of nitrogen gas is...

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Abstract

A coating blade of wear proof type used in paper making process consists of steel blade body. It is featured as using a layer of alloy coat sprayed on surface of steel blade body as transition layer, using a layer of intermetallic compound / fine ceramics composite material sprayed on surface of alloy coat as operation layer to form three layer structure of coating blade with hardness of HRC 50-65.

Description

technical field [0001] The present application relates to papermaking coating blades, especially wear-resistant papermaking coating blades. Background technique [0002] Coating blade is a key component in the process of producing high-quality printing paper, and its quality directly affects product quality and production efficiency. The traditional coating scraper is a spring steel blade treated with oxidation blue surface, but this kind of steel scraper is affected by many factors during use, such as scraper loading, coating machine speed, coating amount, coating solid content , type of pigment and quality of base paper, etc., wear quickly, life is short, frequent tool changes are required, and productivity is low. [0003] In order to improve the wear resistance of the coating scraper, a ceramic coating scraper is currently used to replace the steel scraper, which is to coat a layer of metal oxide on the surface of the pretreated steel scraper and perform precision grind...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21G3/00D21H23/34
Inventor 孙宏飞王灿明宋强
Owner SHANDONG UNIV OF SCI & TECH
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