Spring manufacturers how to spring material selection

Spring manufacturers how to select material spring spring material selection of raw materials, shall, according to the features of spring bear the load, the size of the in-situ stress condition, ground stress, operating temperature, natural environment material, life, whether you need to electrical conductivity magnetic regulation, using performance, raw materials comes from elements such as clear and price. When clear cross section appearance and specifications of raw materials, should give preference to the national industry standards and enterprise standards required by the series of product specifications, to minimize the use of non-standard series product specifications of raw materials. Medium, small and medium-sized spring, very is spiral extension spring, should give preference to use after strengthening solution of stainless steel wire, lead bath temperature, such as oil and drawn wire heat treatment hardening stainless steel wire, with higher compressive strength and good process performance, fatigue properties is higher than general quenching heat treatment of stainless steel wire, easy production and processing, good process performance, stable quality. Carbon spring steel wire and the wire stainless steel after cold drawn a lot of the remaining geostress, production and processing after the spring, there is a lot of the remaining geostress, quenching after the specification change is very big, can't control precision. Oil quenching heat treatment of stainless steel wire is in stainless steel wire stainless steel wire is drawn to the requirement to carry out the demodulation strengthening solution, after most of the remaining geostress entities, forming the ultra-low temperature quenching after spring, the specification change is not big, high temperature resistant reliability is better than cold drawn stainless steel wire. Big small and medium-sized spring, in view of the loading precision and high ground stress should use cold drawn material or polished stainless steel plate after cold drawn. In view of the spring load precision and in-situ stress is low, can use hot rolled stainless steel plate. Leaf spring usually adopt 56 si2mn simnvb, 56, 65 si2mna, 56 simnmov, 65 CRMN, 65 CRMNB galvanized flat steel and other steel grade. Preferable compression spring cross section of raw materials, using circular cross section. Rectangle and rectangle cross section of raw materials, strong tolerance, good impact resistance properties, can let the spring again practical, but less raw material comes from. And the price is higher, in addition to the unique must, is usually as far as possible do not use this kind of raw materials. In recent years, research and development with round stainless steel wire flattening alternative ladder shaped stainless steel wire, obtained the very good practical effect.
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