金属材料术语范文

金属材料术语范文金属材料术语范文 Metal Terminology F 金属术语Fxx 6 1611 28 00FACE CENTERED Concerning cubicspace lattices Having equivalentpoints atthe cornersof theunit celland atthe centersof itssix faces A face centered cubicspace latticeis characteristicof oneof theclose packed arrangementsof equalhard spheres FATIGUEThe phenomenonleading tofracture underrepeated orfluctuating stress Fatigue fracturesare progressivebeginning asminute cracksand growunder theaction offluctuating stress FERRITIC STAINLESSSTEELHas abody centeredcubic BCC structure These alloysare thechromium stainlesssteels containinglow carbonlevels They arehardenable primarilyby coldworking although somewill hardenslightly byheat treating Ferritic stainlesssteels workharden muchslower thanaustentitic stainlesssteels FERROALLOYAn alloyof ironwith asufficient amountof someelement orelements suchas manganese chromium orvanadium foruse asa meansin addingthese elementsinto moltensteel FERRO MANGANESEAn alloyof iron and manganese 80 manganese used inmaking additionsof manganeseto steelor cast iron FERROUSRelated toiron derived fromthe Latinferrum Ferrous alloysare therefore iron basealloys FIBER ORFIBREDirection inwhich metalshave beencaused toflow as by rolling with microscopicevidence inthe formof fibrousappearance inthe direction of flow FIBER STRESSUnitstress whichexists atany givenpoint ina structuralelement subjected to load given asload perunit area FILED EDGESFinished edges the finalcontours ofwhich areproduced bydrawing thestrip overa series of smallsteel files This isthe usualand aeptedmethod ofdressing theedges of annealed springsteel stripafter slittingin caseswhere edgewiseslitting cracksare objectionableor slittingburr isto beremoved FINISHED STEELSteel thatis readyfor themarket withoutfurther work or treatment Blooms billets slabs sheet barsand wirerods aretermed semi finished FINISHES Thesurface appearanceof thevarious metalsafter finaltreatment suchas rolling etc Over theyears thefollowing finisheshave beerecognized asstandard intheir respectivefields ALUMINUM SHEET A Commercially Bright B Bright oneside A Bright bothsides D Embossed Sheets Produced byusing embossedrolls BLACK PLATE A Dull finishwithout lusterproduced by use ofroughened rolls B Bright finish a lusterfinish produced by use of rollshaving amoderately smoothsurface COLD ROLLEDSTEEL SHEETS A Commercial Finish A dullsatin surfacetexture produced by roughenedrolls B Commercial BrightFinish Bright inappearance witha texturebetween lusterand avery finematte finish C Luster Finish Produced by useofground andpolished rolls Note This isnot anumber3finish COLD ROLLEDSTRIP STEELSNo 1Finish A dullfinish producedwithout lusterbyrolling on roughenedrolls No 2Finish A regularbright finish produced byrolling onmoderately brightrolls No 3Finish Best BrightFinish A lustrousor highgloss finish producedbyrolling on highly polished rolls Also referredto as Mirror Finish COPPER BASEALLOYSAcid Dipped Dry rolledfinished Produced bydry cold rolling bi chromate dippedalloy withpolished rolls resulting ina burnishedappearance andretaining thecolor obtained by dipping True MetalColor Bright Dipped Finish Finish resulting from anacid dip Buffed orPolished Surface A finishobtained by buffing resulting ina highgloss orpolished finish Cold RolledFinish A relativelysmooth finishobtainedby cold rollingplain pickledstrip witha lubricant Dry RolledFinish A burnishedfinish resultingfrom drycold rollingbyuseof polishedrolls withoutany metallubricant Hot RolledFinish A darkrelatively roughoxidized finishresultingfromrolling the metal whilehot May subsequentlybe pickledor brightdipped butthe roughsurface remains Stretched BrushedFinish Satin Finish Obtained bymechanically brushingwith wirebrushes orbybuffing FLAT WIRENo 2Finish A regularbright finish No 3Finish Best BrightHigh Glossfinishproducedbyuseof polishedrolls Or byspecial buffing this isa negotiatedfinish STAINLESS COLDROLLED SHEETand STRIPNos 1 2Bwide rectangular inshape Generally producedfrom hotrolled rodsor speciallyprepared roundwire byone ormore coldrolling operations primarily forthe purposeof obtainingthe sizeand sectiondesired May alsobe producedby slittingcoldrolledflat metalto desiredwidth followedby edgedressing FLOWLINESAlways visibleto agreater orless degreewhen alongitudinal sectionhas beensubjectedtoMacro etching indicating thedirectionofworkorrolling FLOW STRESSTheshear stressrequired tocause plasticdeformation ofsolid metals FLUTINGKinking orbreakage dueto curvingof metalstrip ona radiusso small with relationto thickness as tostretch theouter surfaceabove itselastic limit Not tobe confusedwith thespecific product Fluted Tubes FOILMetal in any widthbut nomore thanabout0 005 thick FOLDSDefects caused in metalby continuedfabrication ofoverlapping surfaces FRACTURESurface appearanceof metalswhen broken FRACTURE TESTNickingand breakinga barby meansof suddenimpact to enablemacroscopic studyof thefracture FRICTION GOUGESOR SCRATCHESAseriesofrelatively shortsurface scratchesvariable inform andseverity See Galling FULL ANNEALINGUsedprincipally onironandsteel means heatingthemetalto about100癋 above thecritical temperaturerange followedby soaking at thispoint andslow coolingbelow thecritical temperature FULL FINISHPLATESteel sheetor stripreduced eitherhot orcold cleaned annealed and thencold rolled toa brightfinish FULL HARDTEMPER A No 1Temper In lowcarbon sheetor stripsteel stiff andspringy not suitablefor bendinginanydirection It