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Optimal Chemical Composition: Russian Scientists Develop New High Strength Steel

Photo by Tobias Keller on Unsplash

Scientists from the Institute of Non-Ferrous Metals at Siberian Federal University (SFU) have developed a new high-strength steel that is resistant to extreme wear and tear. They managed to achieve this by precise selection of special chemical additives. This was reported to by the Ministry of Education and Science of the Russian Federation. The results of the study are published in the Metallurgist magazine.

For the basis of the authors of the work have taken steel Hadfield – alloyed steel with a high content of carbon and manganese. Due to its high wear resistance and resistance to abrasion, it has long been used in various industries – for example, in the manufacture of parts of mining equipment and even the tracks of tanks.

Scientists say that in order for alloyed steel to get its properties – low thermal conductivity, high impact toughness and wear resistance – it requires multiple heat treatments or hardening using explosive or electrophysical methods. Such operations consume resources and time, and are not safe for workers.

As explained by the authors of the study, the mechanical processing step of steel can be significantly reduced if the composition of alloying additives is correctly selected. This would also make high-strength steel cheaper and faster to produce.

Scientists analyzed the effect of various alloying additives (manganese, silicon and chromium) on the properties of steel. Then, using the methods of mathematical statistics and forecasting, the most promising proportions of chemical additives that can improve the quality of steel were determined. Applying the obtained data, the authors of the work melted in industrial conditions a whole line of castings with different combinations of alloying additives.

After studying the physical properties of the samples, scientists determined the optimal composition of additives, which will provide the finished steel products with a long service life and maximum endurance.

“We determined the optimal chemical composition of 110G13L steel (Hadfield steel), taking into account the requirements for the value of impact toughness, analyzed data on the range of major elements. Mathematical statistical methods confirmed that the refined chemical composition would be really good for use in extreme conditions,” Aleksandr Kosovich, senior researcher at the laboratory of physicochemistry of metallurgical processes and materials at SFU, explained to the study’s co-author.

The scientists have already applied for a patent and plan to continue working on improving the quality of the steel.

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