Wyniki wyszukiwania - BazTech

1

Mathematical analysis of the influence of the flux-cored wire chemical composition on the electrical parameters and quality in the underwater wet cutting

Parshin S., Levchenko A., Wang P., Maystro A.

Advances in Materials Science

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2021

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Vol. 21, nr 1(67)

77--89

EN

The paper presents research in the field of underwater wet cutting with the use of flux-cored wires in order to improve the quality and performance. The research has resulted into the development of gas and slag systems for flux-cored wires and determination of , optimal parameters for cutting stability and quality. The underwater wet cutting mechanism is a cyclical process with the formation of periodic keyholes in metal, and it consists of operating and idle cycles. Efficiency of the cutting process can be determined by analyzing cycle times, welding current, voltage, power and a number of short circuits. To assess the stability and efficiency of the underwater wet cutting process, the authors have developed the method for analyzing oscillograms to calculate the probability density of current, voltage and power. To determine the quality of cutting, the authors have provided a criterion based on the ratio of the voltage probability density in the idle and operating cycles.

2

Underwater “wet welding & cutting” with NAUTICA stick electrodes for marine and offshore applications

Hilkes Jan, Tuchtfeld Jürgen

Biuletyn Instytutu Spawalnictwa w Gliwicach

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2020

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Vol. 64, No. 3

47--62

EN

The basics of diving and working under water have been highlighted and explained as such, while these circumstances have also great influence on the welding behavior of the consumables applied. The challenge is in the execution of the welds and repairs. The paper covers the diving, welding and metallurgical aspects of underwater „wet” welding & cutting using covered electrodes based on industrial examples and applications for joining and repair welding. Shielded Metal Arc Welding (SMAW) and covered stick electrodes are a very versatile, flexible, simple and practical welding process, for this reason often used for underwater maintenance and repairs.

PL

W artykule przedstawiono i wyjaśniono podstawy nurkowania i pracy spawacza w warunkach podwodnych. Wykonanie spoin i napraw w takich warunkach stanowi spore wyzwanie. Omówiono aspekty spawania i metalurgii podwodnego „mokrego” spawania i cięcia przy użyciu elektrod otulonych w oparciu o przykłady przemysłowe łączenia i spawania naprawczego. Spawanie elektrodami otulonymi (SMAW) jest wszechstronnym, elastycznym, prostym i praktycznym procesem spawania i z tego powodu często stosowanym przy konserwacji i naprawach pod wodą.

3

Historia cięcia tlenem

Pocica A.

Przegląd Spawalnictwa

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2015

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R. 87, nr 7

34--40

PL

W artykule przedstawiono historię cięcia wodorowo–tlenowego i acetylenowo-tlenowego. Opisano sposób pozyskiwania tlenu oraz gazów palnych do cięcia. Przedstawiono również pierwsze palniki, w tym palniki do cięcia pod wodą, a także metody mechanizacji procesu i pierwsze maszyny do cięcia.

EN

The paper presents the history of hydrogen-oxygen and acetylene-oxygen cutting. The metod of obtaining the oxygen and fuel gases was described. The first blowpipes, including the underwater cutting blowpipes and the methods of mechanization of process and the first thermal cutting machines was also presented.

4

Problemy bezpieczeństwa przy cięciu plazmą metali pod wodą

Bal M., Haduch J.

Przegląd Spawalnictwa

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1998

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R. 70, nr 4

7-9