H13鋼淬火、回火過程中相變的研究.pdf

1、東北大學碩士學位論文H13鋼淬火、回火過程中相變的研究姓名：劉貴周申請學位級別：碩士專業(yè)：材料加工工程指導教師：劉相華2003.2.1東北大學碩士學位論文AbstractThestudyonthephasetransformationduringquenchingandtemperingofill3Abstract7Themicrostructureandmechanicalpropeai筍ofH13steelquenchingandt

2、emperingatdifferentconditionswerestu曄眇ymeanofopticalmicroscopyandTEMobservationsThewholephasetransformationduringtemperprocesswastracedbychangingtempertemperatureandtempertimeOnthebaseofstudyontemperprocedurefromlowtohig

3、htemperatureaswellasfromshorttolongtimeThesequenceofprecipitatealternatingwithtimeandtemperatureWasestablishedThereissecondaryhardeningduringtempering，howeverscholardidn’treachagreementonthemechanismofsecondaryhardeningI

4、nthispaperthemodelof[M—C】clusterthatiSmixedsubsitutionalinterstitialsoluteatomclusterw髂consideredthemainfactor＼causedsecondaryhardening／”Inthispaperthenumericalsimulationod3Dtemperaturefieldsduringquenchingprocesswascarr

5、iedouttoforecastmicrostructureformingInaddition，accordingtotempertransformationPcalve，XcurveaswellastemperequationwereestablishedTheydescribequantitativelythehardnessvariationwe。reestablishedandtimeintcmperpmce志andbasisf