Optimering av kornstorlek hos elektroplåt för elbilstillämpningar

• Main Authors: Landström, Clara, Göransson, Sofia, Segervall, Gabriella, Wildt, Karl, Beyermann, Simon
• Format: Others
• Language: Swedish
• Published: Uppsala universitet, Institutionen för materialvetenskap 2020
• Subjects: elektroplåt; kornstorlek; Materials Engineering; Materialteknik
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-424213

As a part of the independent project in Material Engineering a bachelor thesis was done for thecompany Cogent Surahammars Bruk AB. The purpose of this project is to study productionand lab annealed samples of electric steel to find how magnetic and mechanical properties correlatesto grain size. To achieve this three samples with different compositions were annealedat temperatures within the range of 800 - 950 C. The grains were then analysed with lightmicroscopy, mechanical properties were studied with tensile testing, and lastly magnetic propertiesusing a “single sheet tester”. It was found that titanium has an impact on both mechanicaland magnetic properties. With the uncertainties of the project in mind the most probable causebeing hinderance of grain growth. The yield strength and tensile strength for all samples andtemperatures are within the requirements of the company. The three samples meet the criteriaof permeability and power losses differently. One composition seems to meet the requirements,and the other two exhibit inferior results.