Abstract: The tensile  strength (Rm) and  reduction  of  area(Z)of  250  mm×2100  mm  cast  slab  of  steel  CCSD36 (%:0. 14C,1.31Mn,0.02Nb,0.02Ti) at   600～1350  ℃   has   been   measured   by   using   Gleeble- 1500   thermal   simulation testing machine and the structure of fracture of tensile specimen tested at 600～1150 ℃ was analyzed. It was obtained that the  steel had high plasticity  at  1300～900  ℃,of which the Z value  at this temperature range was ≥80%, and the Z value of steel decreased  to 52%～55% at  850～720  ℃(Ⅲ  brittle  zone),therefore  the  strengthening  temperature  of cast  slab  of steel  CCSD36  should  be  ≥900  ℃.

摘要： 用Gleeble-1500热模拟试验机测试了CCSD36钢(%:0.14C、1.31Mn、0.02Nb、0.02Ti)250 mm×2100mm铸坯600～1350℃的强度(Rm)和断面收缩率(Z),并分析了600～1150℃拉伸试样断口的显微组织。得出该钢在1300～900℃Z值≥80%,具有高的延塑性;850～720℃Z值降至52%～55%(Ⅲ脆性区),因此CCSD36钢铸坯的矫直温度应≥900℃。

关键词: 船板钢CCSD36, , 连铸板坯, 矫直温度