Oil Tempered Wire for Making Static Springs

Product Name:  OIL TEMPERED WIRE FOR MAKING STATIC SPRINGS

<sup>The company is a professional manufacturer of oil-quenched and tempered spring steel wire products.

It has 6 fully automatic production lines, 6 wire surface treatment drawing and connection production lines, and 1 straight production line. The products  can be used to manufacture automobile suspension springs, brake springs, clutch springs and engine valve springs. They are also used in machinery manufacturing industries such as vibrating screens and die steel. The company has advanced production lines and perfect monitoring equipment. The management system has obtained IATF16949 system certification , to ensure that product performance indicators are higher than peer products.</sup>

<sup>Heat treatment process, production process and equipment, semi-finished products, Inspection, wire release, line management, introduction, pressure feeding, steel straightening, front pulling machine, front cleaning, quenching and heating, quenching  and heating, quenching and heat preservation, fire spray cooling, post cleaning, tempering and heating , tempering heat preservation , tempering spray cooling , online  flaw detection ,main tractor , oiling , shearing ,guide ,automatic take-up ,inspection ,packaging.

As a key process in the production process, heat treatment can improve the plasticity, toughness and processing performance of elastic steel wire in order to meet various 
performance indicators (mainly mechanical and process performance) required by the standard. In the production process of oil quenched spring steel wire, the heat 
treatment process mainly includes heating, quenching and tempering. Among them, quenching is the key process, because only by heating above the critical point of the 
spring steel wire, and after proper heat preservation, can austenite structure with fine grain and uniform composition be obtained, and then rapidly quenched and cooled to transform into martensite structure, and finally through tempering Obtain uniform and fine troostite structure. After oil-quenched spring steel wire is quenched, there are 
residual stresses inside, including thermal stress in the quenching and cooling process, and phase transformation stress in the martensite transformation process, and 
tempering is the main method to reduce or eliminate residual stress. In addition, the martensite obtained by quenching has sufficient strength but insufficient toughness, 
and tempering is required to improve the ductility and toughness. The tempering transformation process is divided into four stages: martensite decomposition, retained austenite transformation, carbide transformation, recovery of Q phase, recrystallization and cementite aggregation and spheroidization, and the transformation temperatures of the four stages cross each other. As the last process, fire is used to reduce or eliminate the residual stress of the spring steel wire, adjust the strength and improve the plastic toughness.</sup>
 

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