Garbuzova KR2 Variant 25

1. To obtain a hard, wear-resistant surface layer on machine parts, 15HF steel was selected. Its composition includes carbon, manganese, silicon, chromium and phosphorus. The steel group by purpose is structural carbon alloy steel. To achieve the required properties of steel, it is necessary to carry out thermal and chemical-thermal treatments. The heat treatment mode includes heating to a temperature of 860-880°C followed by cooling in air. Chemical-thermal treatment involves cementation for 6-8 hours at a temperature of 860-900°C in a carbon atmosphere. Alloying affects the transformations occurring at all stages of heat treatment and contributes to the formation of the required structure and properties of steel. After heat treatment, the steel has a martensitic structure and high hardness, strength and wear resistance.

2. To increase the strength of crankshafts of ship and automobile engines, 40HFA steel was chosen. Its composition includes carbon, manganese, silicon, chromium, molybdenum, phosphorus and sulfur. Steel group by purpose - structural alloy steel. The heat treatment mode should ensure a hardness of 250-280 HB over the entire cross-section of the shaft. It is necessary to heat to a temperature of 850-870°C followed by cooling in air. Alloying affects the transformations that occur during heat treatment and contributes to the formation of the required structure and properties of steel. After heat treatment, the steel has a martensitic-bainitic structure and high strength and hardness over the entire cross-section of the shaft.

3. For parts operating in mildly aggressive environments, 30X13 steel is used. Its composition includes carbon, chromium and ferrite. The steel group by structure is stainless steel. Chromium in this steel prevents corrosion and ensures its stability in aggressive environments. The heat treatment mode includes heating to a temperature of 950-1050°C followed by cooling in air. After heat treatment, the steel has a martensitic-austenitic structure and high strength and corrosion resistance.

4. The BrBNT-1.9 alloy has the following chemical composition: copper - 98.25%, beryllium - 1.9%, iron - 0.5%. The heat treatment mode includes heating to a temperature of 480-520°C with subsequent cooling in air. With this treatment, beryllium particles are dissolved and released in the copper matrix, which provides increased strength and elasticity of the material. The copper-beryllium phase diagram shows that during such heat treatment, strengthening occurs due to the formation of solid solutions and phases, as well as a decrease in grain size. BrBNT-1.9 alloy is used for the manufacture of conductive elastic elements, such as contacts, springs, etc.

5. Sitalls are crystalline materials consisting of two or more components that have different structures and sizes of crystal grains. Citales are produced by fusing components at high temperatures, often using a vacuum or an inert atmosphere. The size and composition of the crystals affect the mechanical and physical properties of glass ceramics. Citales are used in various industries such as electronics, metallurgy, medicine, etc. due to its unique properties such as high strength, elasticity, heat resistance and corrosion resistance.

Garbuzova KR2 Variant 25

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The product "Garbuzova KR2 Option 25" is not mentioned in the description, so I cannot give a description of this product. However, I can answer questions related to metals and their properties if you have such questions.

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