低硫磷Si-Mn系低合金铸钢的热处理.pdf

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1、４２ज１１௹Vol.４２No.１１２０１７୍１１ᄅHEATTREATMENTOFMETALSNovember２０１７低硫磷Si-Mn系低合金铸钢的热处理１１２２２仝帅武，杜景红，魏世忠，游龙，王晓东（１.昆明理工大学材料科学与工程学院，云南昆明６５００００；２.河南省耐磨材料工程技术研究中心，河南洛阳４７１０００）摘要：০Ⴈೡ૭׈ࣤ、Ԋࠌ൫ဒࠏ、႗࠹࿹࣮ਔ҂๝۽ၜԩ৘਻ਠSi-Mn༢ކࣁۑཁັቆᆮބ৯࿐ྟି。ࢲݔіૼ：ᆞࠅყԩ৘ॖၛڿ೿ᇼ෿൫ဢቆᆮनᄋྟ，൐ჰЧն౏ٳ҂नᇼ෿ቆᆮनᄋ༥߄。ࣜᆞࠅყԩ৘+８９０℃զࠅ+２２０℃߭ࠅൈ，ቆᆮ

2、ູϰ่ઔ൦ุބഒਈҗ਽ύ൦ุࠣН൦ุ，ઌ൦႗ູ４７.３HRC，V྘ಌ१Ԋࠌ་൬ିਈູ３４.６J，ሸކ৯࿐ྟିቋ。ෛሢզࠅ໑ۚശ႗，ഒࡨਈุ൦ύ਽җ，ԛ༅৬॒໾߄ฏႵࡗุ൦ઔ，ۚശ，֌Ԋࠌྟି༯ࢆૼཁ。关键词：Si-Mn༢ކࣁᇼۑ；ಣԩ৘；ቆᆮ；৯࿐ྟି中图分类号：TG161文献标志码：A文章编号：0254-6051（2017）11-0123-04HeattreatmentofSi-Mnlow-alloyedcaststeelwithlowcontentofsulfurandphosphorus１１２２２TongShuaiwu，DuJin

3、ghong，WeiShizhong，YouLong，WangXiaodong（１.FacultyofMaterialsScienceandEngineering，KunmingUniversityofScienceandTechnology，KunmingYunnan６５００３２，China；２.HenanEngineeringResearchCenterforWearResistantMaterials，LuoyangHenan４７１０００，China）Abstract：Microstructureandmechanicalprope

4、rtiesoflowsulfurandphosphorusSi-MnserieslowalloyedsteelwerestudiedbymeansofSEM，impacttestingmachineandhardnesstester.Theresultsshowthatnormalizingtreatmentcanimprovetheuniformityofas-castmicrostructure，andrefinetheoriginalcoarseandunevencaststructure.Afternormalizingpret

5、reatedandthenquenchedat８９０℃plustemperedat２２０℃，themicrostructureofthesteelconsistsoflathmartensite，asmallamountofretainedausteniteandbainite，itshardnessandtheimpactabsorbedenergyreaches４７.３HRCand３４.６J，respectively，whichisthebestincomprehensivemechanicalproperties.Withthei

6、ncreaseofquenchingtemperature，carbideparticlesseparateoutbetweenthemartensites，whileresidualaustenitevolumedecreases，alongwiththeincreasinghardnessandthedecreasingimpacttoughness.Keywords：Si-Mnlow-alloycaststeels；heattreatment；microstructure；mechanicalpropertiesކࣁۑၛఃކࣁݣਈ

7、、ྟࡎбࢠۚႪ൝，ᄝ࣮，ၛ௹ᅳቋႪಣԩ৘۽ၜ，ѩᄝঀ೶СࡱളӁᇏႋགྷս۽ြളӁႋႨᇏ౼ਔऍնᅚ，ᄝݖಀ１０୍Ⴈބ๷ܼ。ࡗ，ކࣁۑб২ၘࣜղݓଽۑӁਈ３０％ၛ［１］ഈ。ఃᇏ，Si-Mn༢ކࣁۑቔູରଈۑ၂ᇕ，ᄝ１试验材料及方法຀ঘࠏ、ն྘ଈࠏ、຋डࠏۋ௔ᇏkg２５ႨҐဒ൫ܼӈ٤ႨႋᇏСഡြ۽ႋ੖ಶ৿，ჰਘູ９８％Ղ۽ਜذ൞，ࢠྟನ、ྟଈର，৷ЧӮః。ٗঃ่ࡱՂ％９９，ٸฏՂ％９９，Ͽํࢲࣖ݁，９８％［２-４］༯෮ླഡССࡱႪ༵࿊ᄴ。࿹࣮іૼ，௴๙݁Ղ׈ࢳ૑ோ，ݣற２５％றํၛࠣݣ༎๲２３％［５］૑ۑᄝӈ໑զࠅ+ᇏ໑߭ࠅުሸކ৯࿐ྟିࢠ，༎

8、๲݁ํ。ಶ৿భ෮Ⴕჰਘ、ᇼ྘ᄝ３００℃༯ޝो３h。ᄝ၂႗，ၜ۽ࠅզ໑ႨҐ༯໑קބನྟ္Ⴕ෮ಶ৿ᇏ，༵ࡆೆՂํ，ປಆ၁߄ު၇Ցࡆೆ݁、૑、ฏ［６］ิശ。ෛሢး৿ഡСބۑ，ࠩശ؎҂௜ඣၜ۽ᇏ၁໑ۑᇅ॥。ٸᄝ１５