To analyze every quality defeCts Of oil-tempered spring steel wire made in China,put forward appropriate improvement measures.

The present development of oil-tempered spring steel wire for automobile was primarily introduced, the effects of chemical composition, metallurgy quality, section shape,surface quality and heat treatment process on microstructure and properties of oil-tempered spring steel wire were discussed.

Application of configuration software to production line of oil-hardened and tempered carbon spring steel wire

To introduce the production process of spring steel wire with continuous line from surface treatment to drawing.

First pass rate of nonstandard high strength spring steel wire is raised from 71.

The mechanical properties of oil hardening and tempering spring wire were introducer in this paper, The process and system constitutes for spring wire with induction heating were proposed, The operation principle of this system was also discussed.

The production line and technology for induction quenched and tempered spring wire are successfully developed  6～12?mm spring wires meeting the demands of YB/T 5103 and YB/T 5104 have been batch processed since August 1998 The keys of stabilizing and improving the quality of finished products are controlling the composition segregation,surface defects and regularity of properties of wire ro

To introduce the basic situation of spring industry quite comprehensively,analyze the quality state of raw material-spring wire,the production,equipment and market of spring etc,put forward the key technology and technological transformation items of spring industry during the course of "The Ninth Five-year Plan".