Study of the Sintering Process of Iron Powders Coated with Nano-Hydrocarbon and the Resulting Microstructure at Temperatures up to 1200 °C
Journal Title: Analele Universitatii "Dunarea de Jos" din Galati. Fascicula IX, Metalurgie si Stiinta Materialelor - Year 2009, Vol 32, Issue 1
Abstract
The objective of the research is development and study of a new ecologically friendly and technologically advanced method for introduction of carbon during sintering of low alloyed iron powders ASC 100.29. The method is based on using hydrocarbon coating of the green powder, which transforms into carbon nanolayers between the powder particles, during the sintering process. The method avoids the use of graphite as alloying element and reductant, and allows for a much better homogenization, less porosity and overall increase of the quality of the final sintered product. The research presented is focused on the processes related to apparent density, fluidity and compressibility of the coated powder and resulting porosity after pressing and sintering. The aim is to determine the optimal coating conditions, and to acquire experimental data concerning key processes during the sintering and the originated microstructure. The sintering process was monitored in situ through DTA measurements and measurement of the exhaust gases pressure. Results obtained so far show better handling conditions for the green coated powders, compared to those using classical approach and higher homogeneity of the sintered specimens.
Authors and Affiliations
Jordan GEORGIEV, Lubomir ANESTIEV, Ekaterina BENDEREVA, Yavor LUKARSKI, Marcela SELECKÁ, Rositsa GAVRILOVA
Keywords
Related Articles
- EP ID EP657674
- DOI -
- Views 76
- Downloads 0
Aluminum Foams with Closed Pores Obtained by Casting Techniques
Techniques for the preparation of metallic foams, including casting, powder metallurgy and metallic deposition, have been reviewed. There is a present interest in the development of materials capable of plastic deforming...
Laser Surface Alloying of Some Steels from SiC Predeposited Powders
For the purpose of studying the possibilities of increasing the wear resistance, specimens of three steels with 0.2%C, 0.46%C and 1%C were surface alloyed with reinforcement from overlapping pastes with green SiC hard pa...
Sources of Emissions in the Sintering and Blast Furnace Plant
The main technological operations for producing the sinter used for preparing the hot metal in the furnace are: preparation and transport of raw materials used for producing the sinter (transport, storage, crushing, sort...
Researches for the Determination of the ATC Si10Mg Alloy Fatigue Life, Function of Different Applied Thermal Treatment Cycles
The experimental researches which were made, emphasized the opportunity of applying heat treatment cycles, in order to increase fatigue life of ATC Si 10 Mg alloy. The increase of minimum fatigue resistance is approximat...
The Influence of the Heat Treatment upon the Resistance to Corrosion of the Composite Obtained Using the Electrodepositing of TiO2 in a Nickel Matrix
The resistance to corrosion of a composite material obtained using the electrodepositing of TiO2 in a nickel matrix subjected to heat treatment was studied using the galvanostatic method; the samples were obtained by the...