Dab tsi ntawm kev kho cua sov yuav tsum tau los kho cov khoom ntawm Monel 400 tom qab vuam?
Tom qab welding Monel 400, uas yog ib-theem ib-theem solid-solution npib tsib xee-tooj hlau alloy, cov txheej txheem vuam yuav qhia cov residual stresses, muaj peev xwm ua hauj lwm hardening, thiab lub zos microstructural inhomogeneities nyob rau hauv lub tshav kub-tshem tawm tsam (HAZ) thiab vuam hlau. Cov yam ntxwv no tuaj yeem txo cov ductility, toughness, thiab corrosion kuj, thiab yuav ua rau muaj kev pheej hmoo ntawm kev ntxhov siab corrosion cracking thiab deformation. Txhawm rau rov qab kho nws cov khoom siv kho tshuab thiab txo cov kev ntxhov siab seem, tus qauv thiab kev kho cua sov tau pom zoo yog kev kho kom zoo nkauj, tseem hu ua kev ntxhov siab annealing lossis kev daws teeb meem annealing, nrog kev tswj xyuas kub, tuav lub sij hawm, thiab txoj kev txias.
1. Kev kho cua sov kub thiab tuav lub sij hawm
Qhov zoo tshaj plaws annealing kub rau Monel 400 welded Cheebtsam yog 870℃rau 980℃(1600℃F txog 1800℃F).
Lub sij hawm tuav yog nyob ntawm lub thickness ntawm lub workpiece: rau txhua txhua 25 hli ntawm seem thickness, ib tug tuav lub sij hawm ntawm 1 teev ib nti (25.4 hli) yog feem ntau pom zoo, nrog ib tug tsawg kawg nkaus tuav lub sij hawm ntawm 15 feeb los xyuas kom meej cov cua sov nyob rau hauv tag nrho cov tivthaiv thiab ua kom tiav kev ntxhov siab so.
Cov kub hauv qab 870℃tsis txaus los tshem tawm tag nrho cov kev ntxhov siab thiab ua kom lub zog ntawm microstructure, thaum qhov kub siab tshaj 980℃yuav ua rau cov nplej coarsening, uas cuam tshuam rau txhua yam muaj zog thiab corrosion kuj.
2. Txoj kev ua kom txias
Tom qab soaking ntawm lub hom phiaj kub, cov tivthaiv yuav tsum tau txias los ntawm cua txias ceev los yog tswj kom ceev ceev txias, es tsis txhob qeeb cua sov.
Kev ua kom txias sai sai ua rau cov nag lossis daus ntawm cov sib xyaw sib xyaw thiab cov carbides ntawm cov ciam teb, uas yuav ua rau tsis zoo rau cov ductility thiab corrosion kuj.
Cov dej quenching feem ntau tsis pom zoo rau qhov tuab lossis qhov sib xws, vim nws tuaj yeem ua kom pom cov thermal stresses tshiab thiab ua rau muaj kev cuam tshuam lossis tawg. Rau feem ntau welded Monel 400 qauv, yuam cua txias yog txoj kev nyiam thiab nyab xeeb.
3. Cov haujlwm tseem ceeb ntawm kev kho cua sov no
Tshem tawm cov kev ntxhov siab ntawm cov welding residual: Tshem tawm cov kev ntxhov siab sab hauv tsim thaum lub sij hawm vuam thermal voj voog, txo qhov kev pheej hmoo ntawm distortion, tawg, thiab kev ntxhov siab corrosion tawg hauv kev pabcuam.
soften lub hardened microstructure: Reverses ua hauj lwm hardening thiab thermal hardening nyob rau hauv lub vuam hlau thiab tshav kub- cuam tshuam cheeb tsam, restores lub alloy lub inherent ductility thiab toughness.
Stabilize lub microstructure: tuav ib tug zoo ib-theem austenitic qauv, tiv thaiv teeb meem thib ob-theem nag lossis daus thiab khaws cia Monel 400 zoo heev tiv thaiv dej hiav txwv, hydrofluoric acid, thiab lwm yam corrosive ib puag ncig.
4. Cov Lus Qhia Ntxiv
Monel 400 tsis dhau qhov kev hloov pauv thaum lub sijhawm cua sov lossis cua txias, yog li kev kho cua sov thiab cua sov feem ntau siv rau cov pa roj carbon thiab cov hlau tsis tshua muaj hlau tsis muaj feem xyuam. Kev kho cua sov tom qab vuam tsuas yog tsim nyog rau cov khoom siv rau cov khoom siv siab, corrosive ib puag ncig, lossis cov kev cai nruj me ntsis. Rau cov kev siv tsis tseem ceeb, tsis tshua muaj kev ntxhov siab, kev kho cua sov tom qab vuam tuaj yeem raug tshem tawm raws li cov qauv tsim thiab cov kev pabcuam.
