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Method for determining performance of anti-wear coating of boiler heating surface tube

A heating surface tube, measuring method technology, applied in the direction of measuring device, strength characteristics, electromagnetic measuring device, etc., can solve the problem of lack of anti-wear coating performance evaluation method, the spraying effect varies widely, confusion and other problems, and is conducive to industry rectification and The effect of healthy development, novel design and good anti-wear effect

Inactive Publication Date: 2016-12-07
GUODIAN NANJING ELECTRIC POWER TEST RES CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the current chaotic spraying market and the lack of performance evaluation methods for anti-wear coatings, the spraying effects vary widely.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This example takes the anti-wear spraying of the water wall near the soot blower in a thermal power plant as an example. The spraying material is KM99 (feCrNiB series spraying material), and the supersonic arc spraying method widely used at present is used for spraying construction. The invention is used to measure the performance of the anti-wear coating of the water wall near the soot blower, and the various measurement standards and processes are as follows.

[0048] 1) Coating thickness: thickness 0.4 ~ 0.7mm.

[0049] The main reasons are: too thin can not effectively cover the roughness of the pipe substrate; too thick and because the thermal expansion of the coating is different from that of the pipe substrate, the coating surface is prone to cracking.

[0050] The thickness of the sprayed area is measured, and the test results show that: the thickness of the sprayed area is all distributed within the range of 0.5-0.7mm, and the spraying is uniform.

[0051] 2) ...

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Abstract

The invention discloses a method for determining performance of an anti-wear coating of a boiler heating surface tube. The method comprises following steps: 1), measuring the thickness of the coating and determining uniformity of the thickness of the coating; 2), performing a microstructure morphology test on the coating and determining micromorphology, porosity and phase structure; 3), testing bonding strength of the coating and determining the bonding property of the coating; 4), performing a thermal shock test on the coating and determining cold and hot alternation resistance of the coating; 5), performing a heat-transfer characteristic test on the coating; 6), performing a microhardness test on the coating and determining erosive-wear-resistant combination performance of the coating; 7), performing an anti-wear characteristic test on the coating and evaluating the erosive-wear-resistant combination performance of the coating. According to the method, the anti-wear effect of the coating can be comprehensively evaluated, a determination system is provided for identification of performance of the anti-wear coating, and besides, the method is simple and reliable.

Description

technical field [0001] The invention relates to a method for measuring the performance of an anti-wear coating of a boiler heating surface tube. Background technique [0002] Boiler heating surface tube wear mainly has three forms: fly ash wear, sootblower blowing wear and mechanical wear, among which fly ash wear is the main form. Fly ash wear refers to fly ash particles (SiO 2 , Fe 2 o 3 、Al 2 o 3 etc.) and the gas-solid two-phase flow formed by flue gas causes plastic wear and cutting wear on the pipe wall. Plastic wear is due to the long-term repeated impact of solid particles on the pipe wall, and the metal is plastically deformed and hardened by repeated extrusion, forming fatigue damage and spot grinding pits; cutting wear is the high-speed movement of gas-solid two-phase flow, and the fly ash particles cut the pipe wall and cause metal wear. damage. [0003] One of the most effective ways to prevent wear of the heating surface tube is to implement anti-wear sp...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01B7/06G01N3/60G01N15/08G01N17/00G01N19/04G01N25/18
CPCG01B7/105G01N3/60G01N15/088G01N17/00G01N19/04G01N25/18G01N33/00G01N33/0096
Inventor 代真蔡培张云华邱质彬黄启龙谢航云
Owner GUODIAN NANJING ELECTRIC POWER TEST RES CO LTD
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