基于ad的电容触摸按键电路设计

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1、基于ad的电容触摸按键电路设计Thefourthchapteristheheattreatmentofsteel9■reviewingandthinkingAglossaryofthe1.heattreatmentHeattreatmentistheprocessofheating,holdingandcoolingmetalmaterialsorworkpiecesinanappropriatewaytoobtaindesiredstructureandproperties・2.isothermaltransformationIsot

2、hermaltransformationreferstothephasetransitionofundercooledaustenitewhentheworkpieceisisothermallyretainedinacertaintemperaturerangebelowthecriticalpoint.3.continuouscoolingtransformationContinuouscoolingtransformationreferstothephasetransformationofundercooledaustenitew

3、hentheworkpieceiscooledatdifferentcoolingratesafteraustenitizing・4.martensiteMartensiteissupersaturatedsolidsolutionofcarbonoralloyelementsinalpha一Fe.1.armealingAnnealingofsteelisaheattreatmentprocessthatheatstheworkpiecetoapropertemperature,keepsitforacertaintimeandthen

4、coolssiowly.2.normalizingNormalizingreferstotheheattreatmentprocessthattheworkpieceisheatedandcooledintheairafteraustenitizing・3.quenchingQuenchingofsteelistheprocessofheattreatmenttoobtainmartensiteor(or)bainitestructurebycoolingtheworkpieceinanappropriatewayafterausten

5、itizing・4.temperingTemperingreferstotheheattreatmentprocessthattheworkpieceishardenedandheatedtoacertaintemperaturebelowAcl,holdingforacertainperiodoftimeandthencoolingtoroomtemperature・5.surfaceheattreatmentSurfaceheattreatmentistochangethestructureandpropertiesofthesur

6、faceoftheworkpiece,onlythesurfaceoftheheattreatmentprocess・6.carburizingInordertoimprovethecarboncontentoftheworkpiecesurfaceandformacertaincarboncontentgradientinit,thechemicalheattreatmentprocessofcarburizingandholdingtheworkpieceinthecarburizingmediumandpermeatingthec

7、arbonatomsiscalledcarburizing・1.thenitridingInacertaintemperature,thechemicalheattreatmentprocessthatmakesthenitrogenatomspenetrateintothesurfaceoftheworkpieceinacertainmediumiscallednitriding,alsocallednitriding・Two,fillintheblanks1.theoverallheattreatmentcanbedividedin

8、toannealing,normalizing,quenchingandtempering・The2.accordingtothedifferentheatingmethods,surfacequenchi