Particularity of the Forming Barcode Image on the Surface of Machine Parts when Marking with a Pulsed Laser

Salpagarov

2022

KEM

This work shows readability of the QR code of the structural alloy Ti2 surface after the thermal influence. The main goal is the readability estimation after exposure to temperatures exceeding operating alloy temperatures and in destruction crash conditions. Contrast and readability were measured by using a Samsung smartphone and the program Adobe Photoshop CC 2017. The graphs of contrast change depending on the heating temperature were drawn. These graphs illustrate that significant changes in contrast are observed in the range from 500 to 600°C due to darkening of the base metal and the substrate, as well as fading of the dark elements of the code.

Section: Methodsmentioning

confidence: 99%

Temperature Influence on Readability of the QR-Code on Titanium Alloy

Salpagarov

2022

KEM

“…Steel AISI 304 (Fig. 1) was marked in the form of a QR code for testing technology [6][7]. Austenitic steel is used as a cold-rolled sheet and a tape of increased strength for parts and structures connected by spot welding and for products subjected to heat treatment [8][9][10].…”

Section: Methodsmentioning

confidence: 99%

A Surface Structure Formation of Stainless Steel Using a Laser

2021

MSF

The paper presents the surface structure formation of AISI 304 stainless steel using the MiniMarker2-20A4 laser system. Austenitic steel was in the form of a cold-rolled sheet and a tape of increased strength for parts and structures. The article reviews the corrosion-resistant steel surface condition after analyzing the influence of power, frequency and speed of the laser and evaluates the impact on the corrosion resistance of the treated surface. The contrast assessment shows the treated structure effect on the alloy surface reflectivity. The calculations of the most optimal marking are made for obtaining the greatest contrast. The maximum contrast obtained as a result of parameter optimization was 0.83 and was improved by 10%. The article also touches on the influence and susceptibility to corrosion of stainless steel samples with laser marking by QR codes. This point displays structural change of the processed area and presentations steel surface structure AISI 304 after corrosion tests.

“…The laser marking is a universal method of applying information. This type metal surface treatment is based upon formation of oxide layers [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…The photosensitive matrix of the barcode reader is capable of recording e times the difference in the intensity of reflected radiation. If the oxide layer has insufficient absorption (< e), then the barcode may be read incorrectly or not read at all [1]. Confident barcode reading is provided by layers with a high degree of contrast K:…”

Section: Introductionmentioning

confidence: 99%

The Formation of Contrasting Nanofilms on a Metal Surface for Bar Coding

2020

KEM

Laser marking is a universal method of applying information to the products surface. Colored oxide films form on metal surface during a thermal exposure. The degree of steel heating influences the film thickness. Corrosion-resistant steel AISI 304 samples were laser-marked with a MiniMarker 2-20A4 precision laser complex. The contrast of the barcodes on a metal area depends on the surface roughness and the chemical composition of the steel. Fe2O3, Fe3O4 oxides forms the greatest contrast. RGB indicators are used to assess contrast. Study results may be applicable to increase the QR code contrast thereby contributing to the improvement of laser marking technology while preserving economic efficiency.