Baosteel 50Nb mold steel, what material is 50Nb, 50Nb

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齐全

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合理

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The characteristic steel of the material is code-named b, which is hot extrusion die steel and domestically developed high-heat-strength hot-working die steel. It is an improved version of the same type of steel, named to highlight the role of niobium. B steel has high hardenability and thermal stability, and has better performance than 3 steel. This base steel type is used for precision forging hot extrusion die steel. Silicon is added to improve oxidation resistance and thermal stability, and niobium is added to refine the grains.
Delivery status
Annealed status
Chemical composition
The chemical composition of the steel (mass fraction): ~.,.,.,3.~.,3.~3. ,.~.,.~.,b.~.3.
Mechanical properties
Tensile strength at room temperature, tensile strength at ℃.
Room temperature impact toughness/, ℃ impact toughness/.
Hot processing specifications
Starting temperature ~ ℃, end temperature ℃, sand cooling after hot processing.
Annealing Specifications
Cool from ℃3 to ℃, furnace cool to ℃, and air cool after coming out of the furnace.
Quenching and tempering specifications
Quenching temperature ~℃, tempering temperature 3~℃, tempering twice, hardness ~.
Typical application examples
Suitable for ordinary and precision forging hot extrusion dies.