欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
利用相变仪和热模拟试验机模拟现场生产工艺条件测定了一种铌钒微合金化高强度船板钢的静态和经三种终轧温度变形后的动态连续冷却转变（CCT）曲线。结果表明：同静态CCT曲线比较，实验钢的动态CCT曲线整体向左上方移动。随冷却速度的增大，实验钢的γ/α相变开始温度逐渐降低；贝氏体相变开始温度Bs先升高到一个平台，随冷却速度的进一步增加又降低；铁素体晶粒细化。终轧温度自900降至800℃，动态CCT曲线的γ／α相变开始温度及贝氏体上临界冷却速度轻微增加，Bs下降10℃左右，晶粒细化。
英文摘要：
A thermo-simulating machine and a dilatometer were used to test the continuous cooling transformation （CCT） diagrams of a kind of Nb-V-microalloyed high-strength hull steel, including the dynamic （with deformation at three temperatures） and the static （without deformation） CCT diagrams, Experimental results show that the dynamic CCT diagrams shift to the left and upper compared with the static ones. With increasing cooling rate the onset temperature of γ/α transformation is gradually lowered, the starting temperature of bainitic transformation Bs increases to a plateau and then decreases, and the ferrite grains are dramatically refined. When the finish rolling temperature reduces from 900 ℃ to 800 ℃, the onset temperature of γ/α transformation and the upper critical cooling rate for bainite slightly increase while Bs decreases about 10 ℃, and the ferrite grains are refined.
同期刊论文项目
同项目期刊论文
Intragranular ferrite formation mechanism and mechanical properties of non-quenched-and-tempered med
Effect of inclusions on the formation of acicular ferrite in Ti-bearing non quenched-and-tempered st
位置：