低合金高强度调质钢控轧控冷工艺优化

来源期刊：钢铁2010年第6期

论文作者：陈炳张 朱伏先 陈永利 金茹 姜中行

文章页码：88 - 93

关键词：低合金高强度调质钢； 控轧控冷； 轧制方式； 冷却速度； 力学性能

Key words：low-alloy high-strength quenched and tempered steel； controlled rolling and cooling process； rolling method； cooling rate； mechanical property

摘    要：研究了低合金高强度调质钢的轧制方式及轧后冷速对调质后微观组织及力学性能的影响。结果表明:在试验条件下,试验钢采用不同轧制方式及冷速获得不同淬火加热前的初始组织及力学性能,但调质后却具有相同的微观组织和力学性能。建议低合金高强度调质钢采用一阶段的轧制方式,终轧温度应高于奥氏体部分再结晶区的上限温度,轧后采用适宜的冷速(4~15℃/s)进行加速冷却。以此工艺调质后的试验钢具有较高的均匀性,与现行TMCP工艺相比,强塑性和强韧性更为优异。

Abstract: The influence of low-alloy high-strength quenched and tempered steel rolling method and the cooling rate on microstructure and mechanical properties after quenching and tempering was studied.The results show that,under the experimental conditions,experimental steels using different rolling methods and different cooling rate to obtain the initial microstructure and mechanical properties,but they have the same microstructure and mechanical properties after quenching and tempering.Low-alloy high-strength quenched and tempered steel recommends using one stage rolling method,finish rolling temperature should be higher than the ceiling temperature of the austenite recrystallization region,after rolling the adoption of appropriate cooling rate(4-15 ℃/s) in an accelerated cooling.In this process the experimental steel quenched and tempered has a higher uniformity,as compared with the current TMCP technology,more excellent strength and plasticity,strength and toughness.