Raw Material Selection for Machining of Mechanical Parts

The most important basis for the selection of materials for mechanical parts processing refers to the material properties that the parts should have when they are used, including mechanical properties, physical properties and chemical properties. 

For most parts, mechanical properties are the main necessary indicators, and the parameters that characterize mechanical properties mainly include strength limit σb, elastic limit σe, yield strength σs or σ0.1, elongation δ, area reduction rate ψ, impact. Toughness ak and hardness HRC or HBS, etc.How to choose materials in the process of machining materials for mechanical parts. What is the process performance of the material?

(1) Machining performance: Tool wear, power consumption and surface finish of parts are the signs to evaluate the cutting performance of metal materials, and are also one of the important basis for rational selection of materials.

(2) Heat treatment:refers to the behavior of steel during heat treatment.

(3) Pressure processing performance: refers to the ability of steel to withstand cold and hot deformation. Good cold deformation performance is marked by good molding, high processing surface quality, not easy to crack; Good thermal deformation performance is marked by good thermal deformation ability, high oxidation resistance, large deformable temperature range and small thermal brittleness tendency.