冷轧压下率对连续退火MR钢组织性能的影响  

Influence of the cold rolling reduction rate on microstructures and mechanical properties of the continuous annealing MR steel

作　　者：孙中华 张鹏 陈文 龚志强 孙晓冉 刘宏强 

机构地区：[1]河北钢铁集团河北钢铁技术研究总院,河北石家庄052165 [2]河北钢铁集团河北钢铁集团衡水板业有限公司,河北衡水053000

出　　处：《轧钢》2015年第4期34-37,共4页Steel Rolling

摘　　要：细小均匀的晶粒尺寸是保证高档MR钢镀锡板产品力学性能均匀性至关重要的因素。本文利用冷轧及连续退火模拟试验机,研究了冷轧压下率对连续退火MR钢镀锡基板组织性能的影响。结果表明:试样经620℃保温40s处理后可以获得完全再结晶显微组织,且退火再结晶平均晶粒尺寸随冷轧压下率呈非线性变化关系,平均晶粒尺寸与屈服强度、抗拉强度和显微维氏硬度之间符合Hall-Petch公式。The homogeneous fine grain size is the essential factor for guaranteeing the mechanical property uniformity of the topgrade MR-based tinplate products. In this paper, using the cold rolling and continuous annealing simulation equipment , the influence of the cold rolling reduction rate on the microstruetures and the mechanical properties of continuous annealing MR-based tinplate were investigated. The results show that the MR steels has the full recrystallization microstructures of annealing at 620 ℃ for 40 s , and furthermore, the cold rolling reduction rate dependence of the average grain sizes of the recrystallization microstructures is non-linear. By compared with the microstructures and the mechanical properties, it is revealed that the average grain size is fit to the Hall-Petch formula with the yield strength, the tensile strength and the micro-vickershardness.

关 键 词：冷轧压下率 连续退火 显微组织 力学性能 MR钢 

分 类 号：TG335[金属学及工艺—金属压力加工] TG142.1[一般工业技术—材料科学与工程]