@article { author = {Gholizadeh, A. and Ebrahimzadeh, R.}, title = {An Analytical model of the organizational culture evaluation in Iran steel industry: a survey research of Tuka Steel Investment Holding Company}, journal = {International Journal of Iron & Steel Society of Iran}, volume = {7}, number = {1}, pages = {1-10}, year = {2010}, publisher = {Iron & Steel Society of Iran}, issn = {2981-0388}, eissn = {2981-0396}, doi = {}, abstract = {The present study has objectively investigated and reviewed 164 managers, employees and workers of Tuka Steel Investment Holding Company (TSIH Co.) as one of the most successful companies in Iran's steel industry. The Survey approach has been adopted to serve the following purposes of this study: a) to define the prevailing organizational culture in steel industry; and b) To review alignment dominant in the prevailing organizational culture with emphasis on the TSIH Co. To achieve the above-mentioned objectives, a researcher- made questionnaire was developed according to Freeman and Cameron model of organizational culture to investigate the dominant culture and the aligenment of the organizational culture. The results of data analysis using ANOVA with repeated measures showed that the dominant organizational culture in these organizations was hierarchical. On the other hand, there was lack of alignment between the dimensions of organizational culture. The research findings showed that due to the governmental structure of organizations, lack of competitiveness, conflicting views of managers in these organizations, appointments of the managers on the basis of connections and lack of stability and cohesion within the active organizations of this industry, they have faced difficulties, the ultimate outcome of which is the lack of conformity and alignment in organizational culture. The researchers, by presenting the research results, intended to find an appropriate approach and orientation to assess organizational culture in Iran steel industry with emphasis on Tuka Steel Investment holding (TSIH CO) in order to present suitable strategies to strengthen or improve the above-mentioned conditions.}, keywords = {Organizational Culture,cultural aligenment,organizational culture models,steel industry,Iran}, title_fa = {An Analytical model of the organizational culture evaluation in Iran steel industry: a survey research of Tuka Steel Investment Holding Company}, abstract_fa = {}, keywords_fa = {}, url = {https://journal.issiran.com/article_6330.html}, eprint = {https://journal.issiran.com/article_6330_dc3944643104e7c8bb40bac9057df3b0.pdf} } @article { author = {Sabzevari Zadeh, A. and Sahraeian, R.}, title = {A general model for production-transportation planning in steel supply chain}, journal = {International Journal of Iron & Steel Society of Iran}, volume = {7}, number = {1}, pages = {11-16}, year = {2010}, publisher = {Iron & Steel Society of Iran}, issn = {2981-0388}, eissn = {2981-0396}, doi = {}, abstract = {This paper is focused on the tactical design of steel supply chain (SSC). A general mathematical model is proposed to integrate production and transportation planning in multi-commodity SSC. The main purpose is to prepare a countrywide production and distribution plan in an SSC with three layers consisting of iron ore mines as suppliers, steel companies as producers, and subsidiary steel companies as customers. An internal supply chain consisting of melting furnaces and casting lines in each producer is also taken into account. Demand is assumed to be deterministic and known at the beginning of planning horizon. Each mine supplies iron ore with specific chemical compounds (CCs) and each producer needs a given volume of iron ore with a pre-determined range of CCs which can be provided by mixing several kinds of iron ores. Finally, a real test case in SSC is described and solved using the proposed model. Sensitivity analysis supports the decision makers with noteworthy information about tactical decisions.}, keywords = {Steel Supply Chain,Production,transportation,Blending Problem,Linear Programming}, title_fa = {A general model for production-transportation planning in steel supply chain}, abstract_fa = {}, keywords_fa = {}, url = {https://journal.issiran.com/article_6331.html}, eprint = {https://journal.issiran.com/article_6331_ed2092dea4d7bfd9330a0792bcec1032.pdf} } @article { author = {Behjati, P. and Najafizadeh, A. and Vahid dastjerdi, H. and Araghchi, M. and Mahdavi, R.}, title = {Influence of Aging Temperature on Mechanical Properties and Sound Velocity in Maraging Steel M350}, journal = {International Journal of Iron & Steel Society of Iran}, volume = {7}, number = {1}, pages = {17-20}, year = {2010}, publisher = {Iron & Steel Society of Iran}, issn = {2981-0388}, eissn = {2981-0396}, doi = {}, abstract = {In the present work, the influence of aging temperature on mechanical properties and sound velocity of Maraging steel M350 was investigated. For this purpose, first, samples were solution annealed at 825◦C for 2 hours and then age hardened at 510◦C-600◦C for 3 hours. Hardness, tensile and impact tests were used for determining mechanical properties and longitudinal ultrasonic velocity was used for determining sound velocity of the samples. The obtained results indicated that hardness, strength and sound velocity of the samples decreases with increase of ageing temperature, whereas, toughness of the samples increases directly with ageing temperature. These results were attributed to the dissolution of Ni3(Mo,Ti) and Fe2Mo precipitates and also to the formation of reverted austenite which are promoted by the increase of ageing temperature. Optical microscopy of the samples revealed that, in this case, the morphology of reverted austenite is mainly of grain boundary and interlath type. Further, a linear correlation between the mechanical properties and sound velocity of the samples was found that can be used in industrial applications.}, keywords = {Maraging steel,Ageing,Reverted austenite,Sound velocity}, title_fa = {Influence of Aging Temperature on Mechanical Properties and Sound Velocity in Maraging Steel M350}, abstract_fa = {}, keywords_fa = {}, url = {https://journal.issiran.com/article_6332.html}, eprint = {https://journal.issiran.com/article_6332_3bba5a2aabf918a78b150ffc55a03e27.pdf} } @article { author = {Hosseini, A. and Alizadeh, M.}, title = {Characterization and Catalytic Behaviour of Nanostructured Iron Oxide Powder from Waste Pickle Liquor of Steel Industry}, journal = {International Journal of Iron & Steel Society of Iran}, volume = {7}, number = {1}, pages = {21-24}, year = {2010}, publisher = {Iron & Steel Society of Iran}, issn = {2981-0388}, eissn = {2981-0396}, doi = {}, abstract = {Nanostructured iron oxide powder that has been recovered from waste pickling liquor unit of steel industry was studied for oxidation catalytic applications. In this research, the powder was characterized by X-ray diffraction (XRD) and transition electron microscopy (TEM) for determination of phase structure, morphology and particle size. Furthermore, the specific surface area of the powder was achieved by BET method. Results show that the powder consists of α-Fe2O3 particles with wide range distribution particle sizes between 50-300 nm. Specific surface area of the powder is about 4.33m2g-1. Moreover, catalytic behaviour of the iron oxide powder was investigated. A quartz tubular furnace was applied as a reactor for measuring catalytic activity. Conversion test results show that CO to CO2 conversion reaction was initiated at about 300°C (light-off temperature) and was completed at about 600°C. Also,the CO to CO2 conversion ratio was almost constant during long-term stability test.}, keywords = {Iron oxide powder,Characterization,Oxidation catalyst,CO removal}, title_fa = {Characterization and Catalytic Behaviour of Nanostructured Iron Oxide Powder from Waste Pickle Liquor of Steel Industry}, abstract_fa = {}, keywords_fa = {}, url = {https://journal.issiran.com/article_6333.html}, eprint = {https://journal.issiran.com/article_6333_24284a32aa706fdbd533f40d7558a3cc.pdf} } @article { author = {Taheri, A. and Saidi, A. and Nourbakhsh, A.}, title = {The effective parameters on thermal recovery and reduction of iron oxides in EAF slag}, journal = {International Journal of Iron & Steel Society of Iran}, volume = {7}, number = {1}, pages = {25-29}, year = {2010}, publisher = {Iron & Steel Society of Iran}, issn = {2981-0388}, eissn = {2981-0396}, doi = {}, abstract = {Steelmaking slag of Mobarakeh Steel Company (MSC) has a high iron content which makes it unsuitable for conventional slag recovery; as in cement industries. On the other hand, EAF slag in this company is almost free of zinc because of using more than 90 percent DRI in the charge. Therefore, removal or recovery of iron from the slag can be a suitable solution to slag recovery in this company. In this research work, cold bonded briquette was made from mixtures of milled slag and coke breeze. The effect of binder content on the strength of the briquettes was studied. The reduction of iron oxides was also investigated by heating up the briquettes in a muffle furnace. The results indicated that using 4wt% sodium silicate as binder leads to reasonable compression strength of about 1500kg although the strength could be increased to as high as 2000kg by using 6wt% binder. Up to 40% reduction, the reducing rate was almost high; then it decreased and reached a minimum value at 70% reduction. Using extra carbon than the reaction stoichiometry didn’t have significant effect on the reduction. Temperatures above 1000°C up to 1200°C had also a small positive effect on the reduction rate. When reduction was performed at 1000°C, for 180min, semi-reduced material (70% reduced) could be obtained, which can be used (cold or hot) in BOF or other steelmaking processes.}, keywords = {}, title_fa = {The effective parameters on thermal recovery and reduction of iron oxides in EAF slag}, abstract_fa = {}, keywords_fa = {}, url = {https://journal.issiran.com/article_6334.html}, eprint = {https://journal.issiran.com/article_6334_5d86526b48ab24371b0591a6fed65c8a.pdf} } @article { author = {Kahrobaee, S. and Kashefi, M. and Nateq, M.}, title = {Quantitative measuring of pearlite in carbon steels using electromagnetic sensor}, journal = {International Journal of Iron & Steel Society of Iran}, volume = {7}, number = {1}, pages = {29-32}, year = {2010}, publisher = {Iron & Steel Society of Iran}, issn = {2981-0388}, eissn = {2981-0396}, doi = {}, abstract = {Non-destructive Eddy current (EC) technique has long been used to detect discontinuities in materials. Recently, its application has been extended to characterize materials microstructure. In order to identify different microstructures, four plain carbon steel bars with different chemical compositions (AISI 1015, 1035, 1045 and 1080) were used in annealed condition. The pearlite percentage, carbon content and estimated hardness were determined according to responses of the samples to eddy current. They include primary and secondary voltages and normalized impedance. These data were compared with those obtained from conventional metallographic method and hardness measurements. The results show the high precision of the non-destructive eddy current method in determining the pearlite percentage, hardness and carbon content of mild carbon steels}, keywords = {}, title_fa = {Quantitative measuring of pearlite in carbon steels using electromagnetic sensor}, abstract_fa = {}, keywords_fa = {}, url = {https://journal.issiran.com/article_6335.html}, eprint = {https://journal.issiran.com/article_6335_99e11a0bc338f6920d57ee39d380dc23.pdf} } @article { author = {Tavakoli Shoushtari, M.}, title = {Effect of ageing heat treatment on corrosion behaviorof 17-4 PH stainless steel in 3.5% NaCl}, journal = {International Journal of Iron & Steel Society of Iran}, volume = {7}, number = {1}, pages = {33-36}, year = {2010}, publisher = {Iron & Steel Society of Iran}, issn = {2981-0388}, eissn = {2981-0396}, doi = {}, abstract = {The 17-4PH alloy is a martensitic stainless steel with 3–5 wt% Cu, strengthened by the precipitation hardening. Due to excellent mechanical properties, corrosion resistance and ease of heat treatment, this alloy has unique applications in nuclear power plants and marine constructions. In this paper, the influence of ageing heat treatment, solution annealing followed by ageing at 480, 550 and 620 °C on the corrosion behavior of 17-4PH stainless steel in 3.5% NaCl is reported. Various DC electrochemical measurements and microscopical examination was used. The slow scan rate potentiodynamic polarization revealed that by increasing ageing temperature from 480 to 550 °C, the pitting potential is significantly increased, but further increasing the ageing temperature to 620 °C reduces the pitting potential. Microscopical observation also confirmed the formation of several metastable and stable pits in the sample aged at 620 °C.}, keywords = {17-4PH stainless steel,Corrosion,Ageing heat treatment,Potentiodyanimc polarization}, title_fa = {Effect of ageing heat treatment on corrosion behaviorof 17-4 PH stainless steel in 3.5% NaCl}, abstract_fa = {}, keywords_fa = {}, url = {https://journal.issiran.com/article_6336.html}, eprint = {https://journal.issiran.com/article_6336_3fa53f959b1108c80e216bb4b996ea99.pdf} }