Coj koj mus nkag siab txog cov hlau tsis muaj viav-txheej pov puag
Raws li hom kev puas tsuaj tshaj plaws ntawm kev siv vuam vuam tsis zoo, vuam tsoo puas cuam tshuam rau qhov ua tau zoo thiab kev nyab xeeb ntawm welded qauv. Los ntawm kev kawm ntawm cov tshooj lus dhau los, peb tau tshaj lij cov kev paub ntawm kub tsoo, tawg txias thiab rov ua kom tawg. Hnub no, peb los nkag siab txog hom kab nrib pleb kawg-tsis sib luag.
Lamellar keej yog txheej txheem tawg tsim raws txheej txheej kuav los ntawm txheej txheem ntawm phaj steel hauv daim hlau vuam thaum vuam. Nws feem ntau qhia pom kev sib hloov transcrystalline lossis intergranular tawg. Cov cim ntawm lamellar cov kab nrib pleb suav nrog cov hauv qab no:
01
Cov ntawv tsis yog xim hlau, thaum lub sijhawm yob cov txheej txheem ntawm cov phaj steel, qee qhov tsis yog xim hlau (xws li sulfides thiab silicates) hauv cov hlau tau muab rho tawm rau hauv cov kab sib txuas nrog cov ntxuag cov kev taw qhia, uas ua rau muaj qhov sib txawv ntawm cov khoom siv hlau tsis sib xyaw, suav nrog lub latent yam uas ua rau lamellar ntuag ntawm lub welded qauv, thiab tseem yog qhov tseem ceeb ntawm lamellar kua muag.
02
Txwv txoj kev ntxhov siab, vim tias lub voj voog thermal ntawm vuam, qhov kev txwv tsis pub txuas ntawm qhov txuas welded yuav tshwm sim. Txhawm rau muab cov phaj tuab tuab T-puab thiab hla sib koom ua ke, muaj qhov tsis txaus ntseeg siab lossis khoov khi raws li cov xwm txheej tsis hloov pauv lub zog, thaum loj dua tus nqi no, nws yooj yim los ua lamellar tsim kua muag.
03
Diffusion ntawm hydrogen, hydrogen yog qhov ua kom zoo rau kev tawg. Vim tias qhov sib txawv ntawm hydrogen thiab kev sib xyaw ntawm cov lwg me me, cov kev ntxhov siab hauv zos tsub zuj zus. Thaum hydrogen sib sau ua ke thaum kawg ntawm kev koom ua ke, nws txhawb nqa qhov debonding ntawm cov hlau tsis suav thiab cov hlau, thiab yuav rub tawm cov ntawv sib txuam. Hlau, uas qhia hydrogen-hob yam ntxwv ntawm cov pob txha lov.
04
Kev ua haujlwm ntawm lub hauv paus cov khoom siv, txawm hais tias kev suav nrog yog qhov laj thawj rau lamellar tearing, tab sis cov cuab yeej lub zog ntawm cov hlau kuj tseem muaj qhov cuam tshuam tseem ceeb ntawm lamellar tearing. Cov hlau' s yas tawv tsis zoo, thiab qhov yooj yim tawg tau tawg, uas yog, muaj peev xwm tiv taus lamellar kua muag tsis zoo.
Txhawm rau tiv thaiv qhov tshwm sim ntawm cov txheej txheem tawg, Z-kev coj kev nyuaj siab thiab kev ntxhov siab yog qhov tshwj xeeb hauv kev tsim thiab kev tsim qauv. Cov kev ntsuas tshwj xeeb yog cov hauv qab no:
{{0} Nrho. Txhim kho txoj kev sib koom ua ke thiab txo qis kev raug mob. Cov kev ntsuas tshwj xeeb xws li: txuas ntxiv rau qhov kawg ntawm arc pib phaj los ntawm qee qhov ntev, uas muaj qhov cuam tshuam los tiv thaiv kev tawg; hloov cov txheej txheem ntawm lub weld los hloov qhov kev coj ntawm txoj kev ntxhov siab shrinkage ntawm lub weld, hloov qhov ntsug arc pib phaj mus rau kab rov tav arc pib phaj, hloov qhov chaw ntawm weld, Ua rau qhov sib koom' s tag nrho cov kev ntxhov siab mus tib seem rau cov txheej dov tau zoo tuaj yeem txhim kho qhov tsis kam rau lamellar tearing.
{{0} Nrho. Kev siv txoj hauv kev ua haujlwm vuam tsim nyog, qis-hydrogen vuam txoj kev yog qhov zoo, xws li roj tiv thaiv vuam thiab subcant arc vuam, qhov txias tawg feem ntau yog qhov me me, uas zoo rau kev txhim kho qhov tsis kam rau lamellar tearing.
{{0} Nrho. Siv cov khoom muaj zog qis los sib piv vuam cov ntaub ntawv, thaum lub hlau hlau muaj qhov muaj txiaj ntsig tsawg thiab qhov siab ua haujlwm siab, nws yooj yim los mloog cov lus ntawm txoj kab txuas ntawm lub weld thiab txo cov kab mob hauv thaj chaw muaj cua sov ntawm cov khoom siv, uas tuaj yeem txhim kho tsis kam rau cov kua muag ntuag ntuag.
{{0} Nrho. Nyob rau hauv kev thov vuam tshuab, saum npoo surfacing vuam cais tawm txheej yog saws; symmetric vuam siv rau kev sib npaug ntawm cov kis faib tawm thiab txo kev ua kom txawv txawv.
{{0} Nrho. Txhawm rau tiv thaiv cov txheej txheem tsim kua muag los ntawm kev ua khaub thuas sib tsoo, qee qhov ntsuas los tiv thaiv kev tawg txias yuav tsum tau txais yuav ntau li ntau tau, xws li kev tsim nyog ua kom nce preheating, tswj qhov kub thiab txias ntawm txheej, thiab lwm yam ntxiv. kuj tuaj yeem saws tau.
{{0} Nrho. Peb kuj tseem tuaj yeem siv cov vuam me me thiab ntau lub vuam txheej txheem los ntawm kev tswj hwm qhov weld loj
