Note: Hardening Stainless Steel Surgical Knife Blades

Objective:

Harden a 4"(101.6mm) section of a Stainless Steel surgical blade measuring 7" (177.8mm) long. Hardness should be 48 to 53 Rockwell C on the blade after processing. 

End Product:

Stainless Steel surgical blade

Equipment:

Ambrell 1 kW induction heating system equipped with a remote workhead including one (1) capacitor equaling 1.2 µF An induction heating coil designed and developed specifically for this application.

Materials:

420 Stainless Steel Surgical Blades measuring 7"(177.8mm) long, 1/4"(6.35mm) wide at the shank, and 0.085" (2.2mm) thick at the blade.

Temperature:

1850ºF(1010ºC)

Frequency:

365 kHz

Testing:

A two-turn helical coil with an internal quartz tube designed to scan the length of the blade is used to heat the blade to 1850ºF (1010ºC) to achieve the desired hardness.

Benefits:

  • Flameless process

  • Improved production rate

  • Consistent & repeatable results 

Hardening Stainless Steel Surgical Knife Blades

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