01%, its code is Mechanical Bearing 6901 as σp0. Strength is divided into different forms of external force: Compressive strength: code σbc, which refers to the strength when the external force is under pressure. There are also multiple scales for this kind of hardness: a. Scale 15T: code HR15T, using 147. It is suitable for the hardness measurement of surface hardened steel, carburized steel or cemented carbide.588mm.961 ~ common term?? Strength limit (strength) code: σ; unit: MPa (or N/mm2) Introduction: refers to the maximum ability of metal materials to resist external force damage.
It is suitable for the hardness measurement of softer materials such as non-ferrous metals, annealed steel, and normalized steel. The specified non-proportional elongation stress: Code: σp; Unit: MPa (or N/mm2) Introduction: Refers to the tensile process of metal materials In, the gauge length is divided into the stress when the non-proportional elongation reaches a certain specified value; when the specified value is 0. c. Common terms-elastic limit, extension Length rate and reduction of area a Elastic limit code: σe; Unit: MPa (or N/mm2) Introduction: When the metal material is subjected to an external force (tension) to a certain limit, if the external force is removed, its deformation (elongation) will disappear
While restoring to the original state, the elastic limit refers to the ability of the metal material to resist this limit of external force.2c. Vickers hardness: Code: HV Unit: None Introduction: Use 49. It is suitable for the hardness determination of larger workpieces and deeper surface layers. Scale 45N: code HR45N, using 441.588mm. b. Scale 30T: Code HR30T, the hardness obtained by the 294. Common terms for the percentage of cross-sectional area?? Impact absorption energy and impact toughness Impact absorption energy (impact energy): Code: Ak Unit: J Introduction:
The work absorbed when a material sample of a certain shape and size is broken under impact load Impact toughness (impact value): Code: аk Unit: J/cm2 Introduction: The quotient obtained by dividing the impact absorption energy by the cross-sectional area at the bottom of the specimen notch.a Yield point (physical yield strength): code: σs; unit: MPa (or N/mm2) Introduction: refers to the resistance of the material when the metal material is subjected to a certain degree of tensile force, its deformation (elongation) suddenly increases greatly
Tags: Mechanical Bearing 6901
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