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pro vyhledávání: '"Marian BORDEI"'
Autor:
Marian BORDEI
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 43, Iss 4 (2020)
In continuous casting it is very important that the cooling system is correctly dimensioned. Improper cooling conditions can reduce the quality of the finished product and cause perforations of the solidified crust. In order to be able to minimize th
Externí odkaz:
https://doaj.org/article/cc260cbd64c2432bb92a92dca645e98f
Autor:
Marian BORDEI
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 43, Iss 4 (2020)
The continuous casting of the steel can cause cracks on the surface or inside, which arise due to thermal and mechanical stresses. To eliminate these defects, mathematical models are drawn up with which temperature fields, expansions and stresses can
Externí odkaz:
https://doaj.org/article/36bcb270d7894e98acf49592f9b701a2
Autor:
Marian BORDEI, Bogdan CARP
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 43, Iss 2 (2020)
During the casting process, the crust of the steel wire is permanently subjected to thermo mechanical stresses (temperature variations, pulling, bending and straightening forces, ferrostatic pressure), which, when exceeding the deformation capacity o
Externí odkaz:
https://doaj.org/article/2558115db4b44a0094bfa18817afbafb
Autor:
Marian BORDEI, Bogdan CARP
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 43, Iss 2 (2020)
The normalizing of ferritic-pearlitic steels is a heat treatment, which consist of reheating into the austenite and subsequent air-cooling. For greater thickness, e.g. 100 mm, variations in the requirements may be permitted or required for particular
Externí odkaz:
https://doaj.org/article/6764194e63b44095bd8b419d2a8b8956
Autor:
Marian BORDEI
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 41, Iss 1 (2018)
The required profile of the cylinders is achieved by their proper correction after the change due to wear. In this paper I studied how the profile of the working cylinders can influence the profile of hot rolled steel strip.
Externí odkaz:
https://doaj.org/article/94a8298325f144d19eac0112012d1ce7
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 40, Iss 4 (2017)
Steel remains the most used material in the machinery industry, the construction of oil and gas pipelines, etc. Hot rolling is no longer a simple means of obtaining the final geometry of products in the steel industry, but in some way leading to the
Externí odkaz:
https://doaj.org/article/917f44a29a234456841960efefaf1912
Autor:
Marian BORDEI, Florentina POTECAȘU
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 40, Iss 4 (2017)
This paper had as a starting point the broken down through explosion suffered by the coat of a cylinder made of cast iron. The cylinder coat material must provide the necessary resistance to dynamic and static stresses and, especially, to wear, takin
Externí odkaz:
https://doaj.org/article/1d872135e87a45fb839009f201b384f1
Autor:
Vasile BĂLAN, Marian BORDEI
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 39, Iss 4 (2016)
The paper presents experiments conducted with disruptor THOR-1, a new type of gas-dynamic device used to neutralize improvised explosive devices. Disruptor THOR-1 [1] was designed and practically built as a gas-dynamic device that propels jets using
Externí odkaz:
https://doaj.org/article/2ccb25e28b424824acae68d95fd5240c
Autor:
Vasile BĂLAN, Marian BORDEI
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 39, Iss 4 (2016)
The paper presents a type of recoilless disruptor developed according to the studies of two disruptors performance and shortcomings currently used DR2 and RICHMOND, respectively. In creating the new disruptor, there were kept some common elements of
Externí odkaz:
https://doaj.org/article/7284e2e9c1884a9482daa690a19b5da1
Autor:
Ștefan DRAGOMIR, Marian BORDEI
Publikováno v:
The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, Vol 39, Iss 3 (2016)
The problems related to the protection of the environment are regarded especially as a result of the local pollution by the industry and agriculture or by the overcrowded areas, which have led to the disturbance of some ecosystems and to worse living
Externí odkaz:
https://doaj.org/article/9d1d1f5a580a408b88bac2fdb34d65ce