Electron-microscopic examinations were carried out on cernentite isolated from annealed, cold-rolled and subsequently annealed 0.65% carbon steels, and the behaviours of cernentite during these treatments were studied with the following results:(1) During cold deformation of steel, a cernentite crystal in the steel curves elastically, and then splits along its cleavage into many laminar fragments. The width of the split laminae lies in the range from 1500 to 3000 A, and these laminae themselves show a fibrous structure, having a width of about 300 A. In the case of spheroidal pearlite, however, the cernentite globules suffer no change in the process of cold-rolling.
展开▼
