中碳VN微合金钢热变形行为.pdf

35 1 Vol35 No1 2010 1 HEAT TREATMENT OFMETALS January 2010 VN 1 1, 2 1 1 , , , ( 1北京科技大学 材料科学与工程学院, 北京 100083; 2北京科技大学新金属材料国家重点实验室, 北京 100083) - 1 : leeble1500 VN( 900~ 1050 )( 0005~ 30 s ) ( )(m ) - 1 , 1050 1 s , m m , , m : VN; ;(m ) : TG1117 : A : 2010) H ot deform ation behavior of m edium arbon VN m i roalloyed steel 1 1, 2 1 1 WAN Chengyang, LIU uoquan ,WU Jinbin, XU Lei ( 1School ofM aterials Science and Engineering, University ofScience and Technology Beijing, Beijing 100083, China; 2State Key Laboratory forAdvancedM etals andM aterials, University of Science and Technology Beijing, Beijing 100083, China) Abstra t: The hot deformation behavior of medium carbon VN m icroalloyed steel was investigated by using leeble1500 thermal - 1 smi ulator at9001050 and strain rates of 000530 s The behavior of test steel in hot deformation was analyzed through true strain true stress curves, diagrams of dynam ic recrystallization, power dissipation efficiency()map and strain rate sensitivity(m )mapThe results - 1 show that dynam ic recrystallization of the test steel occurs at 1050 and 1 s The results through true straintrue stress curves, diagrams of dynam ic recrystalliz