Metallographic diagram of 86CrMoV7 cold roll steel

KVR0CrMoV7 steel is a cold-rolled roll steel with low-alloy elements and Mo, V, and Cr additions. This material has superior physical properties compared to KVR0CrMoV6, and its mechanical properties are also very good.

KVR0CrMoV7 is widely used in the production of machinery components and parts, such as bearings, gears, shafts, and gears, owing to its excellent formability, high strength and toughness, fatigue resistance, impact resistance, corrosion resistance, wear resistance and other excellent properties.

KVR0CrMoV7 steel has a relatively low carbon content compared to other steels, and its structure consists mainly of ferrite, martensite and retained austenite, which are evenly distributed along the entire width and thickness of the material. This homogeneous microstructure has excellent toughness, ductility and machinability, while the fully refined grain structure ensures high strength and the best tolerances. The strength of KVR0CrMoV7 is approximately 2200 MPa, which is slightly lower than that of other steels due to its low carbon content. The fatigue strength of KVR0CrMoV7 is also excellent and exceeds that of high carbon steels.

KVR0CrMoV7 has a refined grain structure, fine machining properties, good polishability and anti-corrosive properties. Its surface can even develop an elegant luster after being polished and oiled. The nice grain finish and corrosion resistance make it suitable for use in many application areas.

To ensure the best performance of KVR0CrMoV7, special attention must be paid to heat treatment, surface treatment and machining. The thermal treatment should be done with proper temperatures and times to prevent damages to the material and preserve its mechanical properties. Specialized machining tools are required for the machining of KVR0CrMoV7, and the operators must be well trained in proper cutting strategies.

The metallographic structure of KVR0CrMoV7 can be seen in the accompanying micrograph. The microstructure consists of a fine grained ferrite matrix containing a small amount of carbides, carbonitrides and retained austenite. The carbides are uniformly distributed throughout the material, while the retained austenite is concentrated around inclusions. The micrograph also shows that the boundaries between the grains are straight, indicating good forging performance.

The properties of KVR0CrMoV7 can be further improved with special thermal treatments such as quenching, tempering, soft annealing, martempering and austempering. Quenching is used to enhance strength and hardness, while soft annealing is used to reduce residual stress and improve workability. Martempering and austempering are used to improve the stability and fatigue resistance of the material.

In conclusion, KVR0CrMoV7 is a unique cold-rolled steel with a homogeneous microstructure and excellent physical and mechanical properties. It has good formability, high strength and toughness, impact resistance, corrosion resistance, wear resistance and fatigue strength. This material is used in the production of machinery components and parts, such as bearings, gears, shafts, and gears. Proper thermal treatments and machining are necessary to obtain the best performance of this material.

86CrMoV7 Cold Rolling Mill Steel Microstructure

86CrMoV7 is a cold rolling mill steel which is used to manufacture rollers and rolling rolls for cold rolling mills. The chemical composition of 86CrMoV7 is C (0.8-0.86%), Mn (0.45-0.55%), S (≤ 0.035%), P (≤ 0.035%), Si (≤ 0.4%), Cr (0.5-0.8%) and Mo (0.3-0.5%). 86CrMoV7 steel can be improved its toughness by heat treatment and has excellent wear resistance and corrosion resistance.

The microstructure of 86CrMoV7 cold rolling mill steel contains a ferritic-pearlitic matrix with dispersed carbides, mainly M7C3 and M23C6 carbides, with a small amount of other carbides. The microstructure of 86CrMoV7 is mostly refined and homogenized, and its mechanical properties are very high. The microstructure of 86CrMoV7 is composed of a ferrite matrix and a small number of carbides. The content of carbides is quite low, and the number and size of carbides are relatively uniform.

Under a microscope, the metallographic structure of 86CrMoV7 cold rolling mill steel is mainly formed by ferrite which is fine and uniform, with a small amount of carbides distributed on its surface. The size of carbides is relatively small, spherical or oval. 86CrMoV7 steel has excellent wear resistance and corrosion resistance. The wear resistance of 86CrMoV7 cold rolling mill steel is mainly related to the morphology, number and size of carbide particles, and the fit between grain boundary and carbide particles.

In conclusion, 86CrMoV7 cold rolling mill steel has excellent wear resistance and corrosion resistance due to its microstructure which is mainly composed of ferrite and a small amount of carbides. The size of carbides is relatively small and uniform. The metallographic structure of 86CrMoV7 steel under the microscope is mainly formed by ferrite which is fine and uniform, with a small amount of carbides distributed on its surface.