Stress relieving springs is the most common form of heat-treating springs.
This video shows two large batch ovens used for stress relieving larger springs in large batch quantities.
Smaller springs can be stress relieved in an in-line furnace.
If not properly stress relieved, a spring can hold residual stresses that may later lead to cracking, distortion, and ultimately failure.
It is important that stress relief furnaces are calibrated on a regular basis to ensure that springs are being heat treated properly.
Just as important as the heating process is the cooling process.
Springs must cool at a slow rate to avoid additional stresses which may cause microscopic structure changes, leading to possible fatigue or failure.
For more information about your stress-relieving your unique spring application, please contact Katy Spring today:
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Katy Spring & Mfg. Inc.