Steel Can Be Worked Cold

As noted above, steel can be worked cold,

as in the case of cold-rolled steel. Heat treatment of cold-worked

steel is a very delicate operation. Cold working hardens and strengthens

steel. It also introduces internal stresses. Heat-treatments are

designed to eliminate the stresses without losing the hardness

and strength. This is done by tempering at a low heat. Avoid the

blue range (350 to 750 deg.C.). Tempering for a considerable time just

under the critical is liable to cause great brittleness. Annealing

(reheating through the critical) destroys the effect of cold work.

Steel Before The 1850's Steel For Chisels And Punches facebooktwittergoogle_plusredditpinterestlinkedinmail