65 mn
spring how to heat treatment?
Spring factory tell you 65 mn spring steel yi chao wen, refer to the heating temperature and heat preservation time.
The proposed 820 degrees heat, moderate heat insulation.
Tempering temperature: 320 degrees to enough time.
Strength: 45
48HRC.
Performance is good.
High toughness spring steel 65 mn raw material belongs to, and to solve before will not carefully after plating fracture or fracture during application.
As a result, 65 mn raw material * good after polishing or sand blasting process before plating, change again that surface is very clean and tidy, dilute acid (
5 -
10% sulfuric acid + inhibitor)
Solve carried out immediately after plating, and carry out except hydrogen solution (within 1 hour after plating
Around 200 degrees, with the exception of hydrogen 4 hours)
, electroplating was normal in that way.
Also have, if the 65 mn is after tempering process, the tempering temperature shall be in 380 -
400 Celsius, if less than this temperature tempering, can cause tempering ductility, plating and how to keep an eye on fracture rate will exceed 50%.
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