50CrVA spring plate

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Round steel
Steel strip
Spring steel
Plate
Spring steel wire
Manufacturer
Xining Special Steel
Composition
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Manufacturer
Price
Grade
Special Steel
-d:..> Passed Analysis
Heat treatment characteristics of steel
Formulate different heat treatment plans
Study
the mechanical properties and metallographic structure of steel after different heat treatments. And the influence of steel's hardness, impact toughness and metallographic structure on the steel's resistance to alfalfa powder wear. After test and analysis
the following conclusions are finally drawn
.
After the steel is austenitized at
℃
When isothermal at different temperatures
With isothermal As the temperature increases
the hardness of steel decreases slightly
but the impact toughness increases exponentially. From the analysis of the metallographic structure of steel after heat treatment
Steel composed mainly of a structure composed of martensite and lower bainite mixed in a certain proportion
has better comprehensive mechanical properties.
Comprehensive
Analysis of steel impact toughness, hardness and wear tests
In different heat treatment processes
Specimen
Process used
(
℃ Austenitizing
℃ Isothermal
℃ Low temperature tempering
)
Best.
Under this test condition
the wear performance of the heat-treated
steel improved
%-%
.
Analysis based on the average wear amount of the wear specimen
There is no obvious rule to follow between the wear amount of alfalfa powder and the steel's hardness and impact toughness.
Under normal circumstances
The increase in hardness and toughness can increase the wear resistance of the material. However, in soft abrasive wear, simply improving the hardness or impact toughness of the material may not necessarily improve the wear resistance of the material. Under this test condition
hardness itself is not directly proportional to wear resistance
but a reasonable combination of hardness, plasticity and toughness can improve
rigid’s resistance to alfalfa powder abrasive wear
> This is because the plasticity and toughness of the material
decomposes the positive pressure of the abrasive on the material surface
and reduces the possibility of the abrasive being pressed into the matrix
thereby reducing the micro-cutting of the material. Tests show that the wear resistance of alfalfa powder is directly related to the metallographic structure of steel.
From the analysis of wear morphology
The abrasive wear mechanism of steel resistant to alfalfa powder is mainly micro-cutting wear
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-d:..> Medium temperature tempered state
Steel is at room temperature and

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Tensile properties under strain rate conditions
Studied
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Temperature Intervals are loaded into

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_(.)

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rate. /> Stress
Creep properties of steel. The creep deformation structure and fracture morphology of steel were observed and analyzed using metallographic microscope, transmission electron microscope and scanning electron microscope. The power law equation and the power law failure equation are used to describe the creep law of
steel
Finally, the creep model of
steel at low temperature is obtained.
With the increase of tensile speed
the yield strength and tensile strength of steel show an increasing trend
while the elongation and area reduction show a decreasing trend. As the temperature increases
the yield strength and tensile strength of steel gradually decrease
and the elongation and area reduction gradually increase. Macroscopic fracture observation shows that the fracture type is ductile fracture.