Moscow Polytechnic University, Moscow, Russia

G. Kh. Sharipzyanova, Cand. Eng., Associate Prof., Vice-Rector for Education, e-mail: guzel@mtw.ru

Moscow Polytechnic University, Moscow, Russia¹ ; National University of Science and Technology MISIS, Moscow, Russia²
Zh. V. Eremeeva, Dr. Eng., Prof., Dept. of Metallurgy¹, Dept. of Powder Metallurgy and Functional Coatings², e-mail: eremeeva-shanna@yandex.ru

Yurga Technological Institute, branch of the National Research Tomsk Polytechnic University, Yurga, Russia
D. V. Valuev, Cand. Eng., Associate Prof., e-mail: valuev@tpu.ru

Irkutsk National Research Technical University, Irkutsk, Russia
A. S. Bovkun, Cand. Eng., Associate Prof., e-mail: Bovas87@yandex.ru

The creation of materials that meet the requirements of world analogues is one of the most important tasks of science and technology. The main focus is on metals and alloys with fine and ultra-dispersed structures, as well as powder materials. The creation of such materials requires new technological solutions, special equipment and expensive additives. One of the ways to obtain the required technological properties is to use complex natural materials as an additive or modifier. This method is cheaper compared to other costs and does not require additional equipment, as well as less preparation costs. In this work, the influence of modifying additives was studied to study the influence of modifier additives based on lanthanum and europium oxide powders on the mechanical properties of castings and the content of non-metallic inclusions in castings. Steel smelting was carried out in an arc furnace. The resulting cast samples were subjected to subsequent heat treatment. Mechanical tests of the samples showed a significant influence of powder additives on the structure and properties of steel castings. Research results show that complex modification with rare-earth metal powders has an effective effect on the microstructure and mechanical properties of steel. The strength properties of modified samples made of steel 110G13L increase. Tensile strength increases by ~4%, relative elongation by ~10-15 %. The presence of a modifier greatly facilitates the process of coagulation of non-metallic inclusions. As a result, impact strength increases more significantly, especially at negative temperatures.

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