粒状贝氏体对10CrNiMoV球扁钢力学性能的影响

来源期刊：上海金属2010年第3期

论文作者：陈雪慧 杨才福 张倩 苏航 张永权

文章页码：34 - 37

关键词：10CrNiMoV球扁钢； 轧后热处理； 粒状贝氏体； 低温韧性

Key words：10CrNiMoV Bulb Flat Steel； Heat Treatment after Rolling； Granular Bainite； Low Temperature Toughness

摘    要：研究了粒状贝氏体对10CrNiMoV球扁钢力学性能的影响。结果表明,热轧或正火连续冷却过程中,形成了大量的粒状贝氏体,显著降低了钢的韧性。热轧直接回火后,粒状贝氏体得到一定程度的分解,改善了钢的低温韧性,-40℃冲击功可达46 J。经过正火加回火处理后,粒状贝氏体得到了充分的分解,低温韧性显著提高,-40℃冲击功达到144J。

Abstract: Effects of granular bainite on mechanical properties of 10CrNiMoV bulb flat steel were studied.A large number of granular bainite were formed in the period of hot rolling or normalizing continuous cooling,which decreased obviously the low temperature toughness of the steel.The granular bainite could be decomposed by direct tempering treatment after hot rolling and the toughness of steel be improved,the A_kv-40 value could then reach to 46 J.Furthermore,A_kv-40 could be raised up to 144 J by normalizing plus tempering treatment in which the granular bainite decomposed sufficiently.