超快速冷却对中碳钢组织和性能的影响  

Effect of Ultra Fast Cooling on Microstructure and Mechanical Properties of Medium Carbon Steels

作　　者：王斌[1] 周晓光[1] 刘振宇[1] 王国栋[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2011年第1期48-51,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51004037);中央高校基本科研业务费专项资金资助项目(N090307002)

摘　　要：利用超快速冷却装置,通过控制轧后冷却路径,对某中碳钢的显微组织和力学性能进行了系统的研究.结果表明:超快速冷却可以抑制先共析铁素体的生成,破坏原有先共析铁素体的网状分布;超快速冷却显著缩小了珠光体的片层间距;随着超快速冷却后温度的降低,实验钢的强度和室温冲击韧性同时得到了提高.高温终轧+超快速冷却工艺可以使中碳钢获得良好的力学性能,避免了低温轧制带来的轧机负荷大的弊端,提高了轧制节奏.The microstructure and mechanical properties of a certain grade of medium carbon steel were investigated systematically in different controlled cooling processes using the ultra fast cooler provided at the finish rolling exit.It was found that such an ultra fast cooling process can restrain the formation of pro-eutectoid ferrite,and destroy its initial network distribution and minimize the laminar spacing of pearlite obviously.The strength of specimens and their impact toughness at room temperature both increase with the decreasing ultra fast cooling temperature.So,implementing the ultra fast cooling process as just ending the high temperature finish rolling can improve greatly the mechanical properties of specimens and avoid the overloading due to low-temperature hot rolling so as to improve the rhythm of rolling production

关 键 词：超快速冷却 中碳钢 铁素体 珠光体 片层间距 

分 类 号：TG335.55[金属学及工艺—金属压力加工]