Tempering heat
   Tempering heat the steel which was quenched at the tempreature below AC1,than cool down after holding for period of time.
   Tempering may divide into the low-temperature tempering,the mid-temperature tempering and the high-temperature tempering.
   1.low-temperature tempering(250℃below), mainly used by carbon tool steel,the production of low alloy steel as mould,tool,carburization and hardening parts.
   2.mid-temperature tempering(350~500℃),always work for all kinds of elastic element.
   3.high-temperature tempering(500~650℃),mainly used for producting constitutional detail,such as connecting rod,bolt,wheel gear and bearing.
   Tempering purpose:
   First,to reduce residual stress and brittleness caused by quenching.
   Second,to get technical requirements of mechanical properties.
   Third,to stabilize the size of the workpiece.
   Forth,for high hadenability steel,tempering can reduce the hardness and shorten the softening cycle of the steel.

Tag:tempering heat treatment

Source:

• [Selling list] | ASTM A442gr.55 steel plate/sheet, A442gr.55 steel plate Normalizing
• [Selling list] | ASTMA441gr.60 steel plate/sheet, A441gr.60 steel plate Normalizing
• [Selling list] | DIN17102 St E 315 steel plate/sheet, St E 315 steel plate Normalizing
• [Selling list] | DIN17102St E 255 steel plate/sheet,St E 255 steel plate Normalizing
• [Selling list] | DIN17102 E St E 355 steel plate/sheet, E St E 355 steel plate Normalizing