410L (UNS S41003) vs 410 Stainless hlau: Qhov qis-Carbon Weldable Option

 

Dab tsi yog cov ntsiab lus tseem ceeb thiab qhov sib txawv ntawm 410L thiab 410?
Ob leeg yog 12% chromium martensitic stainless hlau. Qhov sib txawv tseem ceeb yog cov ntsiab lus carbon: tus qauv 410 (UNS S41000) muaj txog li 0.15% carbon, thaum 410L (UNS S41003) txwv tsis pub tshaj 0.03% carbon. Cov pa roj carbon tsawg no txo ​​qis hardenability thiab nce ductility hauv lub xeev annealed. Thaum 410 yog siv rau cutlery, li qub, thiab twj tso kua mis, 410L yog teev rau welded fabrications xws li dej pom cov ntxaij vab tshaus, yam ntxwv Cheebtsam, thiab automotive qhov chaw uas yuav tsum tau zoo weld kev ncaj ncees yam tsis muaj complex ncej-weld heat treatment.

Yuav ua li cas cov pa roj carbon tsawg hauv 410L txhim kho weldability piv rau tus qauv 410?
Thaum lub sij hawm vuam, lub tshav kub- cuam tshuam cheeb tsam (HAZ) ntawm tus qauv 410 tuaj yeem hloov mus rau ib qho nyuaj, nkig martensite vim nws cov pa roj carbon ntau dua, ua rau muaj kev pheej hmoo siab ntawm qhov txias txias. Lub ultra- cov pa roj carbon tsawg hauv 410L ua rau muaj softer, ntau dua martensite (los yog ferrite) hauv HAZ. Qhov no ua rau txo qis qhov xav tau rau preheating thiab tom qab-weld kho cua sov rau cov ntu nyias thiab txo qhov kev pheej hmoo tawg. Nws tso cai rau ntau ncaj qha fabrication ntawm welded los ua ke.

Hauv daim ntawv thov twg yog qhov tseem ceeb los qhia 410L es tsis txhob siv 410 ntau dua?
Qhia meej 410L rau txhua qhov haujlwm uas cuam tshuam nrog vuam qhov chaw tshaj tawm -weld heat treatment is impractical or costly, tshwj xeeb tshaj yog rau nyias -gauge fabrications. Cov ntawv thov tseem ceeb suav nrog welded hlau mesh rau cov ntxaij lim dej, architectural los yog industrial moj khaum uas yuav tsum tau nyob rau ntawm - vuam qhov chaw, thiab complex fabrications nyob rau hauv kev kho dej los yog khoom noj khoom haus. Yog hais tias cov khoom yuav raug machined thiab cua sov-kho rau ib qho hardnesstom qabwelding, tus qauv 410 tseem yuav tsim nyog.

Puas muaj kev ua lag luam ua lag luam- tawm thaum xaiv qhov ntau weldable 410L?
Thawj qhov kev lag luam tawm -tawm yog qhov qis tshaj qhov ua tau zoo thiab lub zog tom qab kev kho cua sov piv rau tus qauv 410. Yog li ntawd, 410L tsis yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov uas yuav tsum muaj qhov tawv tawv heev rau kev hnav tsis kam, xws li hauv cov cuab yeej txiav lossis siab - kev nyuaj siab bearings. Nws cov corrosion kuj zoo ib yam li 410. Rau cov neeg tsim qauv, qhov kev txiav txim siab sib npaug fabricability (favoring 410L) thiab qhov kawg txhua yam khoom (muaj peev xwm nyiam tus qauv 410).

Tus neeg tsim khoom yuav tsum paub dab tsi ua ntej ua haujlwm nrog 410L?
Ua ntej, xyuas kom meej cov khoom tau teev tseg raws li UNS S41003 lossis "Qib 410L." Tshawb xyuas daim ntawv pov thawj zeb kuaj kom paub meej tias cov ntsiab lus qis carbon. Thaum nws cov weldability tau txhim kho, cov kev coj ua zoo - siv qis - hydrogen electrodes thiab tswj cov mob qhuav - tseem pom zoo. Rau cov ntawv thov tseem ceeb, sab laj nrog tus kws tshaj lij vuam. Txawm hais tias nws lub npe "L", nws tseem yog cov hlau martensitic, yog li qee qhov kev saib xyuas thaum lub sijhawm tsim khoom tseem raug lees paub piv rau qib austenitic.