亚温奥氏体化等温淬火球墨铸铁的研究  

Study on Austempered Ductile Iron Treated by Intercritical Quenching Process

作　　者：姜利坤 李银玲 石海川 刘金海[3] 琚子来[4] JIANG Li-kun;LI Yin-ling;SHI Hai-chuan;LIU Jin-hai;JU Zi-lai(Qilu University of Technology,Advanced Materials Institute,Shandong Academy of Sciences,Jinan 250014,Shandong,China;Shandong Shanshui Heavy Industry Co.,Ltd.,Jinan 250306,Shandong,China;School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300132,China;Department of Mechanical Engineering of Tangshan Polytechnic College,Tangshan 063020,Hebei,China)

机构地区：[1]齐鲁工业大学(山东省科学院),山东省科学院新材料研究所,山东济南250013 [2]山东山水重工有限公司,山东济南250306 [3]河北工业大学材料科学与工程学院,天津300130 [4]唐山工业职业技术学院机械工程系,河北唐山063020

出　　处：《铸造》2022年第4期403-408,共6页Foundry

基　　金：山东省自然科学基金(ZR2010EL012);唐山市重点研发计划(17110233a)。

摘　　要：研究了亚温奥氏体化等温淬火工艺对等温淬火球墨铸铁组织和力学性能的影响。在等温淬火工艺(等温淬火温度370℃,等温淬火时间120 min)一致前提下,当奥氏体化温度在820~880℃区间变化时,随着奥氏体化温度的升高,热处理后组织中针状铁素体的数量愈来愈少;当奥氏体化温度为880℃时,组织已经全部奥氏体化。此外,随着亚温奥氏体化温度的提高,ADI球铁的抗拉强度和硬度呈现逐渐增大的趋势,而伸长率和冲击韧性则逐渐减小。The effect of intercritical quenching process on the microstructure and mechanical properties of austempered ductile iron was studied.The results show that under the condition of isothermal quenching process(isothermal quenching temperature 370℃,isothermal quenching time 120 min),the increase of austenitizing temperature in the range of 820-880℃will decrease the amount of acicular ferrite in the microstructure;when the austenitizing temperature is 880℃,the microstructure has been austenitized completely.Furthermore,with increasing the austenitizing temperature,the tensile strength and hardness have a ascending trend gradually,while the elongation and impact absorbing energy have a descending trend gradually.

关 键 词：等温淬火球墨铸铁 亚温奥氏体化淬火工艺 金相组织 力学性能 

分 类 号：TG151.1[金属学及工艺—热处理]