heat treatment salts - thin chemie盐薄的化学热处理

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1、HEATTREATMENTSALTS(NON-CYANIDE)INTRODUCTIONMoltensaltbathsofferimportantadvantageinvariousheattreatmentprocessessuchascarburising,annealing,neutralhardening,tempering,austempering,martemperingandquenching.Sincetheworksissurroundedbysalt,heatingisunifo

2、rmdistortionislessandpartscanbemachinedbeforeheattreatment.Scaling,Oxidationanddecarburisationareeliminated.Automatictemperaturecontrolofsaltbathsiseasyandunskilledlaborwithhardlyanysupervisioncanproduceexcellentresults.HARDENINGSALTS·HEATCHEM660Worki

3、ngrange660-900oC(1000oCifcoveredwithECONOMISER)Neutralsaltforhardeningtoolsteelsandselectivelycarburisedsteels,alsousedforpreheatinghotdiesteelandhighspeedsteelpriortohardeningfromHEATCHEM970.MustbeusedwithREGENERATORtomaintainbathinnon-decarburisingc

4、ondition.Alsousedtopreparinginitialmeltsofcyanidebaths.·HEATCHEM720Workingrange720-900oC(950oCifcoveredwithECONOMISER)WatersolubleneutralhardeningsaltusedwithECONOMISERforhardeningvarioustoolsteelsandselectivelycarburisedsteels.SometimesusedwithoutREG

5、ENERATOR,butwith1-10%NaCNasascalefreeheattreatmentmedium.·HEATCHEM650Workingrange650-900oC(960oCforausteniticstainlesssteelwire)Usedforannealingplaincarbonsteelwireattemperaturebelow720oC·HEATCHEM970Workingrange970-1350oCSaltdevelopedforheatinghighspe

6、edsteelsandhotworksteelstotheappropriatehardeningtemperaturewithoutscalingordecarburisation.·HEATCHEM971Workingrange980–1350oCAnewsaltforhardeninghighspeedandhot-worksteelswithminimumaboutofdecarburisation.·HEATCHEM830Workingrange830-1100oCForhardenin

7、gStainlesssteel,hotworksteelor2%Carbon,12%ChromiumQUENCHINGSALTS·QCHEM540Workingrange540–700oCSpeciallydevelopedforquenchinghighspeedsteelandhotworksteeltoolsafterheatinginHEATCHEM970,alsousedforsecondaryhardeningofhighspeedsteeltoolsandfortempering.·

8、QCHEM495Workingrange495–700oCSpeciallydevelopedforquenching/secondaryhardening`lean’highspeedsteeltools,similartoQCHEM540buthaslowermeltingpointandismorehygroscopic.TEMPERINGSALTS·TEMPCHEM150Workingrange160–650oCUsedfortemperingafterhardening,