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1、金属材料的加工工艺性能（Processingpropertiesofmetalmaterials）ProcessingpropertiesofmetalmaterialsTheinformationcollectiontoaddthisinformationtoprint:anonymoussource:unknown--------------------------------------------------------------------------------Blanking(blank)-heattreatment-roughprocessing-heattreatment
2、(quenchingandtempering)-finishing(surfacetreatment)(heattreatment)blankmanufacturingmethods,casting,welding,forming.Thischapterdealswithcasting,forging,welding,heattreatmentandmachinability.Thecastingpropertiesof14.1.metalmaterialsusuallyrefertofluidity,shrinkage,castingstress,segregation,suctionte
3、ndencyandcracksensitivity.Thealloyiscommonlyusedincasting,andthealloygrainissmall.Influencefactorsof14.1.1.onalloyfluidityfactors:alloychemicalcomposition,castingtemperatureandmoldfillingconditions.Alloychemicalcomposition:carboncontent:pureironliquidityisgood,thegreaterthecarboncontent,theworsethe
4、liquidity.About2%ofthefluidityistheworst,andeutecticcastironhasthebestfluidityincastiron.Thefluidityofthealloycanbereducedbyformingelementswithhighmeltingpointinclusionsinthealloycomposition.TheironinthemeltingpointofMnSis1620,isnotconducivetoflow.PcanformFe-Fe3P-Fe3Candthemeltingpointis950,whichis
5、favorabletoflow.The14.1.2.castingshrinkageshrinkageandshrinkageof14.1.2.1.castironwithcarboncontentincreasing,graphiteisconducivetoeliminatethiskindofphenomenoncrack14.1.2.2.castingcoldcrackandhotcracking,theincreaseofPandSalloystrength,thecrackingtendencyincreases.Forgingpropertiesof14.2.metalmate
6、rials:plasticityanddeformationresistance14.2.1.theforgingofhighalloytoolsteelisaimedatbreakingthecoarseeutecticcarbidesinsteel.Slowcoolingafterforging(furnacecooling)topreventcracks.14.2.2.stainlesssteelforgedstainlesssteelbecauseofitsspecialorganization,payattentiontotheprocessofforgingandheattrea
7、tmentonintergranularcorrosionof475DEGCbrittleness:highCrsteelcontainingCrwasmorethan15%inthetemperaturerangeof400-525longtimetopauseorslowcooling,Cratomicordering,phaseandtheparentlatticedistortioncausedbyc
