Stainless steel lined composite steel pipe produced by centrifugal SHS process
01 Jan 1996-Journal of Materials Science Letters (Kluwer Academic Publishers)-Vol. 15, Iss: 12, pp 1060-1061
TL;DR: In this paper, the tension properties, thermal expansion coefficient, microstructure and causes of crack formation of the stainless steel layer in the composite pipe made by the centrifugal-SHS process were investigated.
Abstract: The tension properties, thermal expansion coefficient, microstructure and the causes of crack formation of the stainless steel layer in the composite pipe made by centrifugal-SHS process were investigated. It was shown that the tensile strength is 316 MPa and the percentage elongation is 5–8%. The nonmetal inclusions make the stainless steel brittle. In the brittle stainless steel layer the crack is caused by the thermal stress. The stainless steel mainly composed of austenite phase which grows in columnar grain in the radial direction of a carbon steel pipe and a thin ferrite layer was distributed between the austenite phases. The intermetallic compound AlNi precipitates in the ferrite phase and sigma-phase precipitates at the phase boundarie between the austenite and ferrite. C © 2000 Kluwer Academic Publishers
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TL;DR: In this paper, the tension properties, thermal expansion coefficient, microstructure and causes of crack formation of the stainless steel layer in the composite pipe made by the centrifugal-SHS process were investigated.
Abstract: The tension properties, thermal expansion coefficient, microstructure and the causes of crack formation of the stainless steel layer in the composite pipe made by centrifugal-SHS process were investigated. It was shown that the tensile strength is 316 MPa and the percentage elongation is 5–8%. The nonmetal inclusions make the stainless steel brittle. In the brittle stainless steel layer the crack is caused by the thermal stress. The stainless steel mainly composed of austenite phase which grows in columnar grain in the radial direction of a carbon steel pipe and a thin ferrite layer was distributed between the austenite phases. The intermetallic compound AlNi precipitates in the ferrite phase and sigma-phase precipitates at the phase boundarie between the austenite and ferrite.
12 citations
TL;DR: In this paper, the effects of the angle between the spinning and horizontal axes on the type of centrifugal casters on the Ni-aluminide/steel clad pipe were investigated.
12 citations
TL;DR: In this article, the microstructure and mechanical properties of the stainless steel layer of a composite pipe produced by the centrifugal-SHS process were investigated and the possibility of crack formation was discussed and the methods for increasing ductility and avoiding cracking were given.
8 citations
TL;DR: In this paper, the wear resistance of cermet-lined tubes was found to exceed that of uncoated steel pipes by a factor of above 20, and the results can be used as a basis for elaborating a technology for reprocessing industrial wastes into cermetlined tubes with high wear resistance.
Abstract: Cermet-lined tubes were prepared by centrifugal SHS from industrial wastes (scale) and recycled aluminum. Process parameters were optimized and some alloying agents were tested. The wear resistance of cermet-lined tubes was found to exceed that of uncoated steel pipes by a factor of above 20. The results can be used as a basis for elaborating a technology for reprocessing industrial wastes into cermet-lined tubes with high wear resistance.
4 citations
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Journal Article•
TL;DR: In this paper, the authors compared the production costs of several materials prepared using self-propagating, high-temperature synthesis (SHS) and conventional processes, including Si[sub 3]N[sub 4] powder, AlN tile, and SiC tile.
Abstract: The self-propagating, high-temperature synthesis (SHS) process enjoys inherent economic advantages It also is often the most feasible means to produce certain materials This article compares production costs of several materials prepared using SHS and conventional processes The results are presented of calculations for Si[sub 3]N[sub 4] powder production, AlN tile production, and SiC tile production
28 citations
TL;DR: In this article, the authors deal with the R&D on the centrifugal-thermite process and the properties of the produced ceramic-lined pipe, specially on its resistance against corrosion, abrasion and thermal shock.
Abstract: Long ceramic-lined pipes (>3 m) have been uniformly produced by a thermite reaction induced under the influence of a centrifugal force (“Centrifugal-Thermite Process”) without any high-temperature furnace facilities. The characteristic feature of the present process for forming uniform ceramic layers is in its reaction propagation as well as the reaction heat and centrifugal force. It is very important in improving the quality of the ceramic-lined pipes to find the proper conditions of the reactant and centrifugal force; the former mainly determines the produced ceramic layer quality and the latter the achievement of layer separation and the mechanical properties of the pipes. The present paper deals with the R & D on the centrifugal-thermite process and the properties of the produced ceramic-lined pipe, specially on its resistance against corrosion, abrasion and thermal shock.
20 citations