摘要
研究了低碳Mn-Mo-Nb-B系钢的韧化方向和韧性控制因素中所涉及的主要问题——原始晶粒控制。研究表明:在1250℃左右的加热温度,5min/mm的保温时间内,钢的奥氏体晶粒仍然保持在50μm左右,为奥氏体的再结晶轧制提供了良好的奥氏体晶粒度,但当加热温度高于1250℃后,出现晶粒急骤长大现象。本试验为该类钢制定更合理的加热制度提供了参考。
Studied is the major element among those concerning control of the toughening orientation and toughness of the low-carbon Mn-Mo-Nb-B series steels, i.e., the control of the primitive gains. The result shows that with heating temperature of about 1 250 ℃ and holding time of 5 min/mm, the austenite grain size still remains as about 50 μm, a very appropriate grain size for austenitic recrystallisation-rolling, and that nevertheless, in case of temperature above 1 250 ℃ , the grain size shall become bigger rapidly. This conclusion can be used as reference basis for establishing more logic heating schedule for steels of the above mentioned category.
出处
《钢管》
CAS
2007年第4期14-19,共6页
Steel Pipe
