According to the basic performance, spring steel belongs to the mechanical structure with steel;
According to the quality grade, belong to the quality of special steel, namely in the process of production need special strictly control the quality and performance of steel.
Classified according to chemical composition:
1, carbon spring steel, used more material for: 65 #, 70 #, 65 mn, 82 b, 72 a, 72 b steel wire, is characterized by low plasticity, strong elasticity, strong ability to resist stress.
use: how to simmons bed, car and all kinds of cushion for leaning on, machinery manufacturing, stationery, electric tools, sports machinery,
torsion spring, tension spring, electrical equipment and other industries.
specification range: used in the manufacture of winding forming in cold condition and without hardening spring.
2, alloy spring steel, alloy spring spring steel is used in the manufacture of spring steel or other elastic parts.
Spring is generally work under alternating stress, the destruction of the common form is fatigue failure, therefore, alloy spring steel must have a high yield point and showed (
σs/ σb）
, elastic limit, fatigue resistance performance, to ensure the elastic deformation of the spring have enough ability and can bear larger load.
at the same time, alloy spring steel also requires a certain plasticity and toughness, a certain amount of hardenability, difficult to decarburization and overheating.
Some special spring also requires heat resistance, corrosion resistance, or stable elastic in a long time.
medium carbon steel and high carbon steel can be used for spring, but because of its low hardenability and strength, can only be used to make a smaller cross section, force smaller spring.
Alloy spring steel can be made larger cross section, high yield limit of the spring.
in some specific requirements, such as high ph, damp environment we also often used stainless steel to make a spring.
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