摘要
研究了非调质钢40MnVS钢在控轧条件下的金相组织与力学性能,分析了工艺参数对金相组织和力学性能的影响。试验结果表明:增大轧后冷却速度(从0.1→11℃/s),显著提高钢的强度,而韧性、塑性基本保持不变,这与组织中出现细小铁素体晶粒有关。终轧温度的变化(850～1050℃)对强度、塑性影响不大。随终轧温度的升高韧性较大幅度地下降,当轧后冷速<1℃/s时更为突出,这与铁素体晶粒粗化相对应。室温冲击韧性受铁素体含量和晶粒尺寸控制。
The microstructure and properties of non-heat treated vanadium alloyed steel-40MnVS after controlled rolling have been investigated. The results showed that the strength and toughness are increases with accelerating cooled (from 0.1℃/s to 11℃/s) after rolling, because of ferrite grain refinement. The effects of finish-rolling temperature (from 850℃ to 1050℃) on the strength and ductility is unnoticeable, but the toughness is decreased clearly. When cooled speed is slower than 1℃/s, the toughness at room temperature are controlled by ferrite grain and its volume fraction.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1991年第4期333-336,共4页
Journal of University of Science and Technology Beijing
关键词
非调质钢
控制轧制
金相组织
钢
controlled rolling, non-head treated steel, microstructure, property
