대형Back-Up roll에서 차등열처리가 기계적 성질 및 조직변화에 미치는 영향

The Effect of Differential Heat Treatment on the Mechanical Properties and Microstructure of the Large Back-up Roll

The first specimens were sampled across the depth of roll products processed by rapid heating and cooling of the roll, namely, differential heat treatment. The second samples were taken from the non-heat treated roll at different depths. The samples were heat treated following the same temperature history as that at each corresponding location in the roll where the samples were taken. Consequently, both specimens showed the similar microstructure and mechanical properties (tensile, impact and fatigue strength etc.)