Abstract
Picking up a kind of samples which contained 1.16% C, 0.23% Si, 0.4% Mn and 0.47% Cr, the authors studied on the effect of cold rolling reduction and annealing on the hardness and size of cementite of the safty razor blade steel.
As the results of this investigation, it was ascertained that the hardness became lower as the annealing temperature was raised to 725°C. In the case of cold rolling reduction of 35-18%, the hardness showed minimum value at range of annealing temperature of 500-725°C.
When the annealing time was 3 and 6 hours, the hardness became scarcely different. The size of cementite was not influenced by the annealing temperature under the A1 point, and then grobulizing of cementite became more remarkable as annealing temperature was raised to the A1 point.
