Control of Bismuth and Manganese Sulfide Inclusions in Free-Cutting Steels of Different Classes
Andrey Zhitenev,
Anna Rovbo,
Daniil Nechaev,
Nikita Shaposhnikov,
Sergey Ryaboshuk,
Alexey Alkhimenko
Affiliations
Andrey Zhitenev
Scientific and Technical Complex “New Technologies and Materials”, Peter the Great St. Petersburg Poly-technic University, 195251 St. Petersburg, Russia
Anna Rovbo
Scientific and Technical Complex “New Technologies and Materials”, Peter the Great St. Petersburg Poly-technic University, 195251 St. Petersburg, Russia
Daniil Nechaev
Scientific and Technical Complex “New Technologies and Materials”, Peter the Great St. Petersburg Poly-technic University, 195251 St. Petersburg, Russia
Nikita Shaposhnikov
Scientific and Technical Complex “New Technologies and Materials”, Peter the Great St. Petersburg Poly-technic University, 195251 St. Petersburg, Russia
Sergey Ryaboshuk
Institute of Machinery, Materials, and Transport, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
Alexey Alkhimenko
Scientific and Technical Complex “New Technologies and Materials”, Peter the Great St. Petersburg Poly-technic University, 195251 St. Petersburg, Russia
The paper investigates the behavior of bismuth and sulfur in modern free-cutting steels. It is shown that today there are no mutually consistent thermodynamic data for calculating the solubility of bismuth in a multi-component steel system. Based on the processing of data from separate works, mutually consistent dependences of the solubility of bismuth in pure iron, as well as Wagner interaction parameters for calculation for steels, were obtained. An attempt was made to model the formation of bismuth simultaneously with manganese sulfides during solidification based on the Ohnaka segregation model. Comparison with experimental data shows acceptable convergence of calculations and experiments.
