等温淬火工艺对双相等温淬火球墨铸铁力学性能的影响.pdfVIP

学兔兔 铸 造 Apr．2009 · 368· FOUNDRY VoI．58 No．4 等温淬火工艺对双相等温淬火球墨铸铁力学 性能的影响 姜利坤，刘金海，李国禄，王 磊，田霄楠 (河北工业大学材料科学与工程学院，天津300130) 捅要：对双相ADI(双相等温淬火球墨铸铁DualPhaseAustemperedDuctileIron，简称DualPhaseADI)在不同等温温度 和不同等温时间下的力学性能进行了试验。结果表明：当等温温度在250～390。C时，随着等温淬火温度的升高。双相 ADI的抗拉强度减小，伸长率逐渐增大，硬度先减小后增大，冲击韧性先增大后减小。当等温时间在30～120min时，随 着等温淬火时间的延长，双相ADI 抗拉强度升高，超过90 min后，抗拉强度略有降低；当等温淬火时间为60 minN， 冲击韧性达到最大值，超过60min后，冲击韧性逐渐减小；伸长率先增大后减小；硬度逐渐增大。 关键词：双XHADI；等温淬火；力学性能；冲击韧性 中图分类号：TG143．5 文献标识码：A 文章编号：100l一4977(2009)04—0368—05 Effect of Austem peri ngon Mechanical Properties of DuaIPhase ADI JlANG Li-kun，LIU Jin—hai，LI Guo．1u，WANG Lei，TIAN Xiao。nan (School of Materials Science and Technology，Hebei University of Technology． Tianjin 3001 30，China) Abstract：The mechanicaI properties of duaI phase ADI(Austempered Ductile Iron)were tested under different isothermal quenching temperature and time．The results show that when the isotherma J quenching temperature rises fr0m 250℃ to 390℃．tensile strength of duaJ phase ADI reduces，elongation increases，and the hardness decreases at first，then increases．When the isothermaI quenching time is between 30 min and 1 20 min。tensile strength of duaf phase ADl increases first and then slightly decreases when the time is longer than 90 min；when the time is 60 min，the impact ductility reaches the peak value，then reduces gradually along with the time；the elo