作者简介:侯美伶(1989－)，女，硕士，工程师;E-mail:houmeiling@citicsteel．com。收稿日期:2022-07-28DOI:10．20057/j．1003-8620．2022-00047热处理工艺对Fe-Mn-Al-C钢组织和性能的影响侯美伶，李晨潇，孔祥伟，白云(江阴兴澄特种钢铁有限公司研究院，江阴214400)摘要:利用SEM、XＲD、EPMA等试验方法，对不同退火、固溶以及时效工艺下Fe-Mn-Al-C钢的组织演变规律和力学性能进行研究。结果表明，900～1050℃退火温度对试验钢的组织与性能影响较大，随着退火温度的升高晶粒尺寸增大、碳化物逐渐回溶，强度降低、塑韧性提高，在1050℃保温2h空冷时抗拉强度为1036MPa，断后伸长率为39%，冲击功41J，强塑积40GPa·%;经1050℃保温2h水冷固溶后时效处理，试验钢组织为奥氏体+铁素体+κ碳化物，随着时效温度的增高，κ碳化物逐渐析出，使试验钢的强度增加、塑韧性降低。600℃时效时，抗拉强度1145MPa、断后伸长率22%、冲击功28J，综合力学性能全部满足设计要求。关键词:Fe-Mn-Al-C钢;退火温度;时效温度;力学性能;显微组织EffectofHeatTreatmentProcessonMicrostructureandPropertiesofFe-Mn-Al-CSteelHouMeiling，LiChenxiao，KongXiangwei，BaiYun(ＲesearchInstitute，JiangyinXingchengSpecialSteelCo．，Ltd．，Jiangyin214400)Abstract:ThemicrostructureevolutionandmechanicalpropertiesofFe-Mn-Alsteelunderdifferentannealing，solutionandagingprocessesarestudiedbymeansaofSEM，XＲDandEPMA．Theresultsshowthatthe900-1050℃annealingtemper-aturehasagreatinfluenceonthemicrostructureandpropertiesofthetestedsteel．Withtheincreaseofannealingtempera-ture，thegrainsizeincreases，thecarbidegraduallyredissolved，thestrengthdecreases，andtheplasticity-toughnessim-proves．Whentheannealingtemperatureisat1050℃for2haircooling，thetensilestrengthis1036MPa，theelongationis39%，theimpactenergyis41Jandthebestplasticity-strengthis40GPa·%．Themicrostructureoftheteststeelisaustenite+ferrite+κcarbidesaftersolutiontreatmentat1050℃for2handwatercooling．Withtheincreaseofagingtemperature，κcarbidesprecipitategradually，whichincreasesthestrengthanddecreasestheplasticityandtoughnessoftheteststeel．Whenagedat600℃，thetensilestrengthis1145MPa，theelongationis22%andtheimpactenergyis28J，theco...
