652-3024/01 – Metallurgy of cast iron (ML)
| Gurantor department | Department of Metallurgical Technologies | Credits | 6 |
| Subject guarantor | doc. Ing. Ivana Lichá, Ph.D. | Subject version guarantor | doc. Ing. Ivana Lichá, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 1 | Semester | summer |
| | Study language | Czech |
| Year of introduction | 2022/2023 | Year of cancellation | |
| Intended for the faculties | FMT | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
Acquired knowledge:
-student will be able to characterize the physico-chemical processes in iron smelting in electric furnaces.
-student will have theoretical and practical knowledge mimopecního processing of iron and technological methods of casting iron castings.
Acquired skills:
-student will be able to use their knowledge to make decisions about how to metallurgical processing and casting
-student will be able to apply theoretical knowledge to manage the process of production of iron castings
Teaching methods
Lectures
Individual consultations
Tutorials
Summary
The course focuses on the theoretical and practical knowledge of iron metallurgy and technology and their application in smelting and processing mimopecním. Emphasis is placed on understanding the ongoing processes of melting and explain the nature of vaccination and modification of cast iron. Students will learn about the physical nature of volume changes during solidification of cast iron and about the principles of technological design of castings and risers.
Compulsory literature:
Recommended literature:
Way of continuous check of knowledge in the course of semester
E-learning
http://www.fmmi.vsb.cz/cs/urceno-pro/studenty/podklady-ke-studiu/studijni-opory
Other requirements
Elaboration of semestral projects and completion of the interim tests
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
1.Past and present of production of cast iron. Distribution of iron according to graphite shape, mechanical and physical properties. Basic types of cast irons and their use in industry.
2.Theoretical foundations of crystallization and formation of cast iron structure. Phase diagram of iron-carbon. Effect of chemical composition and cooling rate on the microstructure. Structural diagrams of cast iron.
3. Eutectic crystallization. Effect of physicochemical state cast iron eutectic crystallization. Degree of graphitization of cast iron. Alloyed cast iron.
4.The morphology of solidification of cast irons. Linear and volumetric changes during solidification of cast irons. Volumetric shrinkage of cast iron castings. Sizing riser and gating system.
5.Auxiliary facilities for smelting iron. Cupola fonace, construction. The basics of melting process in KP. Feedstock, changes in the chemical composition of the charge. Intensification melting KP.
6. Metallurgical processing of iron in an electric induction furnace, melting principle, design, modification of the melt. Smelting iron in an electric arc furnace - changing the content of the main elements. Thermal analysis of cast iron.
7.Ladle desulfurization, desulfurization technology principle and cast iron - CaC2, Na2CO3, CaO. Method Gazal. Rotary gas furnace, holding furnace.
8.Solutions of molten metals, types of solutions, thermodynamic activity, activity coefficients, interaction coefficients.
9.Application of the laws of thermodynamics to the molten iron. The solubility of oxygen in the iron. Interaction of carbon-silicon. The use of thermodynamic relations for the EIP of melting. Measurement of the oxygen activity in cast irons.
10.Vaccination. The thermodynamic nature of vaccination, vaccination hypothesis, the effect of oxygen on the vaccination process, mechanism of action and methods of vaccination.
11.Modifications, conditions, loss of Mg. Fundamentals of Thermodynamics modification. Definitions modifying pressure. Reaction of Mg, and Ca-S-S. Deoxidation effect of Mg, Ca, Al-modifying. Control methods of modification.
12.Technology of modification. Methods of irrigation, dip, converter, continuous. Methods cored. Comparison modification methods.
13.Technological of cast iron construction castings. Principles of design in terms of quality, static, dynamic, fatigue and shock loads.
14. Defects of iron castings. Microstructural defects. Shrinkage, blow holes, bubbles, struskovitost. Inadequate mechanical and physical properties.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction