Cov hlau tsis sib xws yog hais txog cov hlau ntawm cov khoom sib txawv (xws li txhuas, tooj liab, thiab lwm yam) los yog qee yam alloys tsim los ntawm tib yam hlau yooj yim (xws li carbon steel, stainless hlau, thiab lwm yam) uas muaj qhov sib txawv tseem ceeb hauv metallurgical zog, xws li lub cev. cov khoom, tshuaj lom neeg cov khoom, thiab lwm yam. Lawv tuaj yeem siv los ua cov hlau puag, muab tub lim lossis vuam hlau.
Vuam ntawm cov ntaub ntawv sib txawv yog hais txog cov txheej txheem ntawm vuam ob lossis ntau cov ntaub ntawv sib txawv (xa mus rau cov tshuaj sib txawv, cov qauv metallographic, cov khoom, thiab lwm yam) nyob rau hauv qee yam txheej txheem. Ntawm cov vuam sib txawv ntawm cov hlau tsis sib xws, feem ntau yog vuam ntawm cov hlau tsis sib xws, ua raws li kev vuam ntawm cov hlau tsis sib xws thiab vuam hlau thiab cov hlau tsis sib xws.
Los ntawm qhov kev xav ntawm cov ntaub ntawv sib koom ua ke, muaj peb qhov xwm txheej, uas yog cov pob qij txha nrog ob cov khoom siv hlau sib txawv, cov pob qij txha nrog tib lub hauv paus hlau tab sis cov hlau sib txawv (xws li cov pob qij txha siv cov khoom siv vuam austenitic rau vuam nruab nrab-carbon quenched thiab tempered steel, thiab lwm yam), thiab welded pob qij txha ntawm cov hlau sib txuas, thiab lwm yam.
Qhov sib txawv ntawm cov ntaub ntawv sib txawv yog thaum ob lub hlau sib txawv yog welded ua ke, ib txheej kev hloov pauv nrog cov khoom sib txawv thiab cov qauv ntawm cov hlau hauv paus yuav inevitably raug tsim. Vim hais tias cov hlau tsis sib xws muaj qhov sib txawv ntawm cov khoom hauv lub cev, cov khoom siv lub cev, cov khoom siv tshuaj lom neeg, thiab lwm yam, piv nrog cov vuam ntawm tib yam khoom, qhov vuam ntawm cov khoom sib txawv yog ntau qhov nyuaj ntawm kev siv vuam tshuab thiab kev siv tshuab. .
Xinfa vuam cov cuab yeej muaj cov yam ntxwv zoo thiab tus nqi qis. Yog xav paub ntxiv, thov mus saib:Vuam & txiav Manufacturers - Tuam Tshoj Vuam & Txiav Hoobkas & lwm tus neeg (xinfatools.com)
Cov teeb meem tseem ceeb uas muaj nyob rau hauv vuam ntawm cov khoom sib txawv yog raws li hauv qab no:
1. Qhov ntau dua qhov sib txawv ntawm cov ntsiab lus melting ntawm cov khoom sib txawv, qhov nyuaj dua nws yog welding.
Qhov no yog vim hais tias thaum cov khoom uas muaj ib tug tsawg melting point mus txog lub molten lub xeev, cov khoom uas muaj ib tug siab melting point tseem nyob rau hauv ib tug khoom lub xeev. Nyob rau lub sij hawm no, cov khoom melted yooj yim nkag mus rau hauv cov qoob loo ciam teb ntawm cheeb tsam superheated, ua rau poob ntawm cov khoom uas tsis tshua muaj melting point thiab kub los yog evaporation ntawm cov alloy ntsiab. Ua kom vuam cov pob qij txha nyuaj rau vuam. Piv txwv li, thaum welding hlau thiab txhuas (uas muaj cov ntsiab lus melting sib txawv), tsis tsuas yog ua ob cov ntaub ntawv tsis yaj ib leeg rau hauv cov khoom, tab sis lawv kuj tsis tuaj yeem yaj ib leeg hauv cov kua hauv lub xeev. Cov hlau ua kua yog muab faib rau hauv cov khaubncaws sab nraud povtseg thiab crystallizes cais tom qab txias.
2. Qhov ntau dua qhov sib txawv ntawm kev nthuav dav coefficients ntawm cov khoom sib txawv, qhov nyuaj dua nws yog qhov vuam.
Cov ntaub ntawv nrog cov kab sib txuas loj dua yuav muaj cov thermal expansion loj dua thiab ntau dua shrinkage thaum lub caij txias, uas yuav ua rau muaj kev ntxhov siab loj hauv vuam thaum lub pas dej molten crystallizes. Qhov kev ntxhov siab vuam no tsis yooj yim rau kev tshem tawm, ua rau cov vuam loj deformation. Vim muaj kev ntxhov siab sib txawv ntawm cov ntaub ntawv ntawm ob sab ntawm lub vuam, nws yog ib qho yooj yim uas yuav ua rau cov kab nrib pleb nyob rau hauv lub vuam thiab qhov kub-kho cheeb tsam, thiab txawm ua rau cov hlau weld tev tawm ntawm lub hauv paus hlau.
3. Qhov ntau dua qhov sib txawv ntawm thermal conductivity thiab tshwj xeeb tshav kub muaj peev xwm ntawm cov ntaub ntawv sib txawv, qhov nyuaj dua nws yog welding.
Lub thermal conductivity thiab lub peev xwm kub ntawm cov khoom yuav deteriorate lub crystallization tej yam kev mob ntawm cov hlau weld, hnyav coarsen cov nplej, thiab cuam tshuam rau wetting kev kawm ntawm cov refractory hlau. Yog li ntawd, ib qho hluav taws xob muaj zog yuav tsum tau siv rau vuam. Thaum lub sij hawm vuam, txoj hauj lwm ntawm lub tshav kub yuav tsum tau mus rau sab ntawm lub hauv paus hlau nrog zoo thermal conductivity.
4. Qhov sib txawv ntawm electromagnetic ntau dua ntawm cov ntaub ntawv sib txawv, qhov nyuaj dua nws yog qhov vuam.
Vim tias qhov sib txawv ntawm cov khoom siv hluav taws xob ntau dua, qhov tsis ruaj khov ntawm qhov vuam arc yuav ntau dua thiab qhov phem dua qhov vuam yuav raug.
5. Qhov ntau intermetallic tebchaw tsim ntawm cov khoom sib txawv, qhov nyuaj dua nws yog welding.
Vim tias cov khoom sib txuas sib txuas yog cov nkig, lawv tuaj yeem ua rau tawg yooj yim lossis tawg hauv qhov vuam.
6. Thaum lub sij hawm vuam txheej txheem ntawm cov ntaub ntawv sib txawv, vim muaj kev hloov pauv ntawm cov qauv metallographic ntawm qhov chaw vuam lossis cov qauv tsim tshiab, kev ua haujlwm ntawm cov pob qij txha welded deteriorates, uas ua rau muaj teeb meem loj rau cov vuam.
Cov cuab yeej cuab tam ntawm qhov sib koom ua ke fusion cheeb tsam thiab thaj chaw muaj kev kub ntxhov yog qhov tsis zoo, tshwj xeeb tshaj yog cov yas toughness yog txo qis. Vim qhov txo qis hauv cov yas toughness ntawm qhov sib koom ua ke thiab qhov muaj nyob ntawm vuam kev nyuaj siab, welded pob qij txha ntawm cov ntaub ntawv sib txawv yog feem ntau ua rau tawg, tshwj xeeb tshaj yog nyob rau hauv cov vuam kub-tshuaj tiv thaiv cheeb tsam, uas yog feem ntau yuav tawg los yog tawg.
7. Qhov muaj zog oxidation ntawm cov khoom sib txawv, qhov nyuaj dua nws yog welding.
Piv txwv li, thaum tooj liab thiab txhuas yog welded los ntawm fusion vuam, tooj liab thiab txhuas oxides tau yooj yim tsim nyob rau hauv lub pas dej ua ke molten. Thaum lub sij hawm txias thiab crystallization, cov oxides tam sim no nyob rau hauv lub grain ciam teb yuav txo tau lub intergranular bonding quab yuam.
8. Thaum vuam cov ntaub ntawv sib txawv, nws yog qhov nyuaj rau cov vuam seam thiab ob lub hauv paus hlau kom tau raws li qhov yuav tsum tau muaj zog sib npaug.
Qhov no yog vim hais tias cov ntsiab lus hlau uas tsis tshua muaj cov ntsiab lus melting yog ib qho yooj yim rau hlawv thiab evaporate thaum lub sij hawm vuam, uas hloov cov tshuaj muaj pes tsawg leeg ntawm weld thiab txo nws cov khoom siv, tshwj xeeb tshaj yog thaum vuam sib txawv ntawm cov hlau tsis muaj hlau.
Post lub sij hawm: Dec-28-2023
