Case Hardening And Heat Treatment - Making A Toolmakers Mill Vice (Part 2)

Part 1:    • Making A Toolmakers Mill Vise - Machi...  

G'day everyone,

This is the second video in the toolmaker vise build series. In the previous video I machined the vise components from a low carbon steel. The steel is relatively soft and is easily scratched and marred. Toolmaker vices are usually hardened to 57-58 HRC to prevent wear. Unfortunately low carbon steel can not be hardened by heating and quenching because it lacks the carbon content required for heat treatment. The solution is to add carbon to the steel. The process I will be doing today will be the case hardening process using the pack hardening method. The outer surface is carburized in the forge to make a hard, high carbon case. I hope you enjoy the video.

Timestamps
0:00 - Intro & Issue With Hardening Low Carbon Steel
1:20 - Preparing Charcoal Power For hardening (Carbon Source)
2:28 - Making The Packing Boxes
4:42 - Packing The Parts For Case Hardening
6:07 - First Attempt And Problems
7:01 - Case Hardening The Steel
9:44 - Emptying The Packing Boxes
10:41 - Case Hardened Parts
11:05 - Quenching & Hardening The Steel
13:05 - Hardened Parts & Removing Scale With Vinegar
14:10 - Testing Parts For Warping
14:44 - Testing Part Hardness
15:45 - Removing Oxide With Electrolysis

#machining #diy #VISEBUILD