Studying the graphite phase in antifriction AChS-2 cast iron

The paper presents the data of studying the characteristics of graphite inclusions in various samples of AChS-2 cast iron. The metallographic analysis was carried out using the Thixomet Pro software, the length of the graphite inclusions, their shape and the occupied area were estimated. The slip coefficient and hardness were measured on the same samples. It was found that the characteristics of the graphite phase affect the antifriction properties of the alloy

Studying the graphite phase in antifriction AChS-2 cast iron

The paper presents the data of studying the characteristics of graphite inclusions in various samples of AChS-2 cast iron. The metallographic analysis was carried out using the Thixomet Pro software, the length of the graphite inclusions, their shape and the occupied area were estimated. The slip coefficient and hardness were measured on the same samples. It was found that the characteristics of the graphite phase affect the antifriction properties of the alloy

Investigation of heat-resistant properties and microstructure of experimental steel based on the Cr-Ni-Ti-Nb system obtained under industrial conditions

The Nb effect on long-term strength of Cr18Ni10Ti steel is considered. There is substantiated selecting this steel for obtaining cast parts for metallurgical furnaces. It is shown that introduction of Nb in the amount of 1 % into steel of a given composition increases tensile strength and long-term strength by 15 %. Improving the properties is associated with the formation of NbC carbides

Investigation of heat-resistant properties and microstructure of experimental steel based on the Cr-Ni-Ti-Nb system obtained under industrial conditions

The Nb effect on long-term strength of Cr18Ni10Ti steel is considered. There is substantiated selecting this steel for obtaining cast parts for metallurgical furnaces. It is shown that introduction of Nb in the amount of 1 % into steel of a given composition increases tensile strength and long-term strength by 15 %. Improving the properties is associated with the formation of NbC carbides

Studying the chrome-nickel cast iron structure and properties after modification on industrial samples

The paper presents the results of studying the structure and properties of chrome-nickel cast iron samples obtained under production conditions. Cast iron with a given ratio of silicon and chromium smelted in an industrial arc furnace was treated with titanium carbide followed by modification with a complex modifier containing (Scanning electron microscope). As a result of the composition adjustment and appropriate processing, a mixed structure was formed represented by an austenite-ledeburite matrix, iron, chromium and titanium carbides and a small amount of free graphite, both lamellar and spherical. This structure is characterized by higher wear resistance and impact resistance compared to Nihard-2 but at the same time it shows lower hardness

Studying the chrome-nickel cast iron structure and properties after modification on industrial samples

The paper presents the results of studying the structure and properties of chrome-nickel cast iron samples obtained under production conditions. Cast iron with a given ratio of silicon and chromium smelted in an industrial arc furnace was treated with titanium carbide followed by modification with a complex modifier containing (Scanning electron microscope). As a result of the composition adjustment and appropriate processing, a mixed structure was formed represented by an austenite-ledeburite matrix, iron, chromium and titanium carbides and a small amount of free graphite, both lamellar and spherical. This structure is characterized by higher wear resistance and impact resistance compared to Nihard-2 but at the same time it shows lower hardness

Genotypes of Echinococcus isolated from domestic livestock in Kazakhstan

The diversity and importance of Echinococcus species in domesticated animals in Kazakhstan are poorly understood. In this study, 17 cysts of Echinococcus were collected from cattle and a further 17 cysts from sheep. DNA was extracted from the individual cysts and used for polymerase chain reaction amplification of mitochondrial subunit 1 of the cox1 and nadh1 gene. Amplicon sequencing results revealed the presence of Echinococcus granulosus sensu stricto G1 in 15 cattle and 15 sheep, and G3 genotype from two cattle. Echinococcus canadensis (G6/G7 strain) was found in two cysts originating from sheep