低碳钢热轧钢筋再结晶控制轧制与控制冷却实现晶粒细化  

GRAIN REFINEMENT OF HOT-ROLLED LOW CARBON STEEL REBAR BY RECRYSTALLIZATION CONTROLLED ROLLING AND CONTROLLED COOLING

作　　者：王瑞珍[1] 杨忠民[1] 车彦民[1] 陈其安[1] 马燕文[1] 陈颖[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081

出　　处：《钢铁》2004年第2期47-50,共4页Iron and Steel

摘　　要：低碳钢低的再结晶温度使得其在钢筋的连续轧制过程中可以通过再结晶控制轧制及控制冷却工艺来实现晶粒细化。试验结果表明 ,成分为 0 .18C- 0 .2 2 Si- 0 .6 0 Mn的低碳碳素钢在 85 0℃或更低温度以较大的变形量变形时 ,可以获得 10～ 2 0μm的奥氏体晶粒尺寸 ;当加以 2 0℃ / s或更高的冷却速度冷却时 ,可以得到 4～ 6μm或更细小的铁素体晶粒尺寸。晶粒细化使得钢筋的力学性能明显提高。The low carbon steel features low recrystallization temperature that makes it possible to achieve grain refinement through recrystallization controlled rolling and controlled cooling in the continuous rolling process of the rebar. Experimental results show that, for low carbon steel with a composition of 0.18C-0.22Si-0.60Mn,the austenite grain size in the range of 10~20 μm can be obtained under heavy deformation at temperature ≤ 850 ℃; with cooling rate ≥20 ℃/s after deformation, 4~6 μm or smaller ferrite grain size can be obtained. The mechanical properties of rebar are improved remarkably by means of grain refinement.

关 键 词：低碳钢 奥氏体再结晶 控制轧制 控制冷却 晶粒细化 晶粒尺寸 热轧钢筋 

分 类 号：TG335[金属学及工艺—金属压力加工] TG142.31[一般工业技术—材料科学与工程]