Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: repair by welding

Sortuj według:

Ogranicz wyniki do:

The Repair of Foundry Defects in Steel Castings Using Welding Technology

Mičian M., Koňár R., Hlavatý I., Winczek J., Gucwa M.

Archives of Foundry Engineering

2018

Vol. 18, iss. 2

177--180

Use of welding technology for the repair of steel castings is particularly common in two areas. These include weld surfacing of protrusions that remained incomplete after casting, or filling the surface defects (cavities). These defects are more common for steel casting than for graphite cast iron, due to the lower fluidity of steel. This article describes a suitable technological process of repairing the defects on the casting using the welding technology. A specimen produced for this purpose was prepared by carving a groove into a cast steel plate 20 GL, which was then filled with a weld metal using MAG (135) technology. The following evaluation of the basic characteristics of the repaired site point to the suitability of the selected technological parameters of the repair procedure. Metallographic evaluation was carried out, further evaluation of mechanical properties by tensile test, bend test and Vickers hardness test. The proposed methodology for the evaluation repair of foundry defects in steel castings also meets the requirements for the approval of welding procedures in accordance with the relevant valid legislation.

Technologia odlewania śrub okrętowych

Woszek M., Słania J.

Dozór Techniczny

2016

z. 6

6--11

Artykuł wyjaśnia podstawowe parametry i zagadnienia teoretyczne dotyczące śrub okrętowych. Przedstawiony został proces odlewania śruby okrętowej wraz z wytycznymi spawania naprawczego. Większość materiału została zebrana w stoczni Hyundai w Korei Południowej.

The paper discusses elementary issues of marine propellers, beginning with explanation of fundamental theoretical principles and ending on the casting processes. The majority of information described in this dissertation is based on materials and evidence gathered at Hyundai Heavy Industries Shipyard located in South Korea.