86CrMoV7 (1.2327) belongs to the German standard alloy tool steel, and the execution standard is DIN EN ISO 4957-2001
The microstructure and properties of 86CrMoV7 steel during the tempering process after forging and quenching were studied using SEM, TEM, and other methods. The results show that forging and quenching can improve the tempering stability of martensite, reduce the size and distribution of carbides in granular pearlite, and significantly improve the comprehensive mechanical properties.
Basic Introduction of 86CrMoV7 Steel
86CrMoV7 steel, also known as 1.2327 and 20CrMoVTiB4-10 steel, is an alloy structural steel with high strength, high-temperature strength, and high wear resistance. It is mainly composed of elements such as chromium, molybdenum, vanadium, titanium, etc., and has good heat and corrosion resistance, suitable for working in high temperature, high pressure, and corrosive environments. 1.2327 steel is commonly used in the manufacturing of mechanical parts such as cold-rolled work rolls, high-strength bolts, nuts, bearings, and gears, as well as high-temperature and high-pressure industrial fields such as petroleum drilling equipment, aerospace, nuclear reactors, and chemical equipment. Its excellent performance and wide range of applications have made 1.2327 steel an indispensable and important material in modern industry. As a high-strength, high-temperature strength, and high wear resistance alloy structural steel, the stability of the quality and performance of 1.2327 steel is crucial for the safety and reliability of industrial production. Therefore, in the production and use process, it is necessary to strictly follow the relevant standards and specifications for operation and management to ensure that the quality and performance of 1.2327 steel reach the best state.
86CrMoV7 Chemical Composition
The chemical composition of 86CrMoV7 steel includes elements such as carbon, silicon, manganese, molybdenum, chromium, cobalt, etc. The content of these elements controls the mechanical properties and corrosion resistance of 86CrMoV7 steel. When manufacturing 86CrMoV7 steel, the first step is to select high-quality raw materials and conduct smelting and heat treatment at specific temperatures and pressures. This can ensure that 1.2327 86CrMoV7 steel has a uniform structure and good mechanical properties. In order to ensure the strength and hardness of 86CrMoV7 material, its chemical composition and manufacturing process are very strict.
The chemical composition of 1.2327 (86CrMoV7) is as follows:
C (%): 0.83~0.90
Si (%): 0.15~0.35
Mn (%): 0.30~0.45
P (%) ≤: 0.030
S (%) ≤: 0.030
Cr (%): 1.60-1.90
Mo (%): 0.20-0.35
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Metallographic Structure of 86CrMoV7 Cold Rolling Work Roll Electroslag Steel Ingot
Steel grade: 86CrMoV7 cold-rolled work roll electroslag steel ingot
Status: As cast electric slag steel ingot
Organization: Due to the remelting and crystallization solidification of the water-cooled copper crystallizer, the surface of the steel ingot has an extremely thin rapid cooling layer, mainly composed of a large number of columnar crystals, with a small equiaxed crystal area in the center. The angle between the orientation of the dendrite axis and the longitudinal axis of the ingot is between 0 ° and 40 °. As shown in the figure, the as cast structure is dense, and the looseness of the ingot is extremely slight. The fine columnar crystals at the bottom of the ingot are consistent with the ingot axis (see Figure b). There is basically no shrinkage cavity, and the formed shrinkage melt pool after shrinkage is very small, only ø 200mm, with a cone height of 110mm (see Figure a), which improves the yield of electroslag ingots.
86CrMoV7 Properties
86CrMoV7 steel yield strength can reach up to 1200MPa, tensile strength can reach up to 1400MPa, and it also has good toughness and wear resistance. In terms of physical properties, the density of 1.2327 steel is 7.85g/cm ³, The thermal expansion coefficient is 11.7 × 10 ^ -6/K, the thermal conductivity is 43W/(m · K), and the specific heat capacity is 460J/(kg · K). In addition, 1.2327 steel has weak magnetism and belongs to ferromagnetic materials. The chemical composition of 1.2327 steel is mainly composed of elements such as carbon, chromium, molybdenum, cobalt, etc. Among them, the carbon content is 0.28-0.33%, the chromium content is 2.50-3.25%, the molybdenum content is 0.25-0.35%, and the cobalt content is 0.25-0.35%. The addition of these elements not only improves the strength and hardness of the steel, but also enhances its corrosion resistance and wear resistance. Due to its excellent performance, 1.2327 steel is widely used in aerospace, automotive manufacturing, mechanical processing and other fields. In harsh environments such as high temperature, high pressure, and strong corrosion, 1.2327 steel can still maintain its stable performance and is a very reliable material.
Material characteristics
The main characteristics of 86CrMoV7 / 1.2327 steel are high hardness, high strength, good wear resistance, strong corrosion resistance, good fatigue resistance, and strong impact resistance. 86CrMoV7 mechanical properties are excellent, mainly manifested in the following aspects:
1. High strength: 86CrMoV7 steel has high yield strength and tensile strength, and can withstand large loads and forces.
2. Good toughness: 86CrMoV7 tool steel has high toughness and is not easily broken under impact or vibration, with good crack resistance.
3. Strong wear resistance: high surface hardness and excellent wear resistance, making it suitable for manufacturing high wear parts.
4. Good corrosion resistance: can be used to manufacture corrosion-resistant components.
5. Good fatigue resistance: 1.2327 steel is not prone to fatigue during long-term use and can maintain a longer service life.
6. Strong impact resistance: 1.2327 steel has excellent impact resistance and can withstand large impact forces.
In summary, 1.2327 steel has excellent mechanical properties and is a very excellent alloy steel widely used in aviation, aerospace, automotive, mechanical, electronic, chemical and other fields.
