1. Mick
  2. Sherlock Holmes
  3. Technical
  4. Thursday, 20 June 2019
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Found some info on the heat treating stages required for making leaf springs so leaving it here for later...

  • Steps in making a leaf spring without special equipment
  • Anneal the steel strip raw material - Heat to approx 800~850°C (cherry to bright red) and allow to cool s-l-o-w-l-y in air.
  • Cut, machine and form and shape the individual leaves.
  • Test assemble the complete spring assembly.
  • When satisfied, disassemble the spring again and harden the leaves (individually). [Heat to approx 820°C (bright red) and quench in oil].
  • Clean the surface with steel wool or similar to see the colours clearly when tempering (next).
  • Temper the leaves. [Heat to approx 320°C (dark blue/grey) and quench in oil].
  • Clean the leaves, and paint or apply final finish if desired.
  • Assemble the spring.

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