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Nyeem ntxiv:Daim Ntawv Teev Xov Xwm Xov

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Yuav ua li cas txheeb xyuas qhov zoo ntawm stainless hlau xov / xov bar / stud ntsia liaj qhov rooj?

1. Sib Nqus Nrhiav

Koj hais tias Stainless hlau sib nqus, txoj cai! Nws kuj muaj tseeb tias nws tsis sib nqus! Qhov tseeb, lawv yog qhov tseem ceeb sib txawv. Peb txhua tus paub tias stainless hlau tau muab faib ua kev sib cais ua cov hlau tsis xeb hlau thiab cov hlau stainless. Anustenitic Stainless hlau tsis yog sib nqus, thaum lub sij hawm ferritic stainless hlau yog lub zog sib nqus hlau. Los ntawm kev sim ntawm kev sim, nws yog muaj pov thawj tias Antenenitic Stainless hlau yuav muaj kev hloov maj mam nyob rau hauv qee yam kev mob tshwj xeeb, tab sis nws tsis yog sib nqus nyob rau hauv ib txwm muaj.

2. Camp Nitric Acid Point Test

Nyob rau hauv ntau kis, nws yog qhov nyuaj kom paub qhov txawv ntawm 200 series, 300 series, 400 series thiab lwm hom stainless hlau nrog lub qhov muag liab qab. Nitric acid taw tes ntsuas yog txoj kev ntsuas kev txawj ntse tshaj plaws los sim cov corrosion tsis kam ntawm substrate. Feem ntau, cov 400 series tsuas yog me ntsis corroded thaum kuaj, thaum 200 series stainless kuj yuav muaj cov cim corrosion tsawg.

3. Hardness Test

Yog hais tias Austenitic stainless hlau yuav qhia qee qhov Magnetism thaum txias rolled nyob rau hauv lub siab ntsuas siab tsuas yog hais tawm tsis raug; Yog li peb yuav tsum tau ua kom sov lub stainless hlau kom txog 1000-1100 ℃ thiab tom qab ntawd dej tso tawm cov hlauetism ntawm cov hlau tsis sib xws thiab sim ua tawv tawv. Lub hardness ntawm Anustenitic Stainless hlau feem ntau yog hauv qab RB85

Ntxiv rau

Lub hardness ntawm 430, 430F thiab 466 hlau tsawg dua RC 24

Lub Hardness ntawm 410, 414, 416 thiab 431 yog RC36 yog RC36 ~ 43

Lub hardness ntawm Ligh Carbon 420, 420F, 440A, B, C thiab Fir Hlau yog RC50 ~ 60

Yog tias lub hardness yog rc50 ~ 55, nws yuav yog 420 hlau

Lub hardness ntawm quenched 440A thiab B cov qauv yog RC55 ~ 60

RC tus nqi ntawm 60 lossis siab dua yog 440C hlau.

4. Los ntawm kev soj ntsuam machining

Yog tias cov hlau stainless raug sim yog tus qauv zoo li tus qauv, nws raug nquahu kom coj mus rau cov tshuab dhos lossis cov tshuab dhos cnc kev tshuaj xyuas, tab sis tseem muaj kev txwv. Txoj kev no tsuas yog tsim nyog rau cov hlau yooj yim thiab qauv hlau stainless, xws li 303, 416, 430F, 440F, 440F. Cov hom hlau tau txheeb pom los ntawm cov duab ntawm cov chips tig. Hom kev sib yuav yooj yim-rau-txiav hlau yuav tawm ib qho tsis hnov ​​tsw tsw qab thaum muab lub xeev qhuav.

5. Phosphoric acid kuaj tau

Nov yog txoj kev kuaj pom uas peb siv ntau zaus hauv lub neej txhua hnub. Cov qauv no yog siv los paub qhov txawv Chromium-Npib Npib Stainless. Ntxiv cov kua qaub phosphoric acid mus rau 0.5% Sodium fluoride tov thiab ua kom sov nws txog 60-66 ℃.

6. Nrhiav tau los ntawm tooj liab sulfate taw tes

Hom qauv no tuaj yeem tshawb xyuas cov hlau roj carbon thiab hlau stainless. Cov concentration tooj liab sulfate daws yuav tsum yog nruab nrab ntawm 5% thiab 10%. Thaum nqis ntawm cov hlau yuav tsum tau kuaj, ib txheej ntawm nws yog xim tooj liab yuav tsim rau saum npoo ntawm ob peb feeb, thaum lub deg ntawm stainless hlau yuav cia li nyob twj ywm unchanged.

7. Sulfuric acid daws teeb meem

Hom no tuaj yeem paub qhov txawv 302, 304, 316, thiab 317 Stainless hlau. Npaj sulfuric acid nrog lub concentration ntawm 20% mus rau 30% thiab qhov kub txog li 70 ° C, thiab muab cov hlau tau sim ua cov tshuaj. 302 thiab 304 Stainless hlau yuav tsim cov npuas ntau thaum lawv ntsib txoj kev daws teeb meem thiab yuav ua dub nyob hauv ob peb feeb;

Ntawm qhov tsis sib xws, 316 thiab 317 Stainless hlau yuav tsis qhia ib qho kev tawm tsam loj hauv kev daws, thiab yuav tsis txhob tawg dub tsis pub dhau 10 feeb.

8. Txias acid point nrhiav tau

Tib hom hlau stainless tuaj yeem txawv los ntawm Dripping ib qho ntawm 20% sulfuric acid tov ntawm cov qauv uas tau ua av, polished, polished lossis ntxig polished.

Tso ob peb tee cov kua qaub ntawm cov qauv ntawm txhua qhov qauv. Nyob rau hauv qhov kev txiav txim ntawm cov roj acid, 302 thiab 304 lub tshuab ua kom huv si yog cov xim dub, thiab tom qab ntawd ntsuab muaju yog tsim nyob rau hauv kev daws teeb meem;

316 Stainless hlau corrodes maj mam thiab maj mam hloov xim av-daj, ces tig xim av-dub, thiab thaum kawg siv qee lub teeb ntsuab xim dub dub muaju hauv kev daws; Cov tshuaj tiv thaiv saum toj no ntawm 317 stainless hlau tau nyiaj qeeb dua.

9. Kev soj ntsuam los ntawm cov txim taws

Lub txim sim txhais tau siv kom paub qhov txawv carbon hlau, txheej txheem allolo thiab cuab yeej hlau, tab sis nws yog ntawm kev siv me me hauv kev paub qhov txawv steel hlau. Txoj kev sim yuam kev no tuaj yeem pab cov neeg ua haujlwm tshwj xeeb tuaj yeem faib cov hlau uas tsis yooj yim, tab sis nws tsis yooj yim kom paub qhov txawv ntawm cov qauv steel sib txawv.

Cov yam ntxwv ntawm cov ntsiab lus ntawm plaub pawg ntawm stainless hlau tshuab muaj raws li hauv qab no:

Chav Kawm A: 302, 303, 316 Hlau, ua kom luv liab liab nrog ob peb rab diav rawg.

Chav Kawm B: 308, 309, 310 thiab 446 hlau, ua kom muaj ob peb lub ntsej muag liab luv nrog ntau rab rawg.

Chav Kawm C: 410, 414, 416, 416, 416, 46 thiab 431 hlau, ua kom ntev ntev ntev nrog ntau rab rawg.

Chav Kawm D: 420, 420f thiab 440A, B, C, F, tsim cov xim daj uas pom tseeb lossis cov nplaim taws ntev.

10. Los ntawm hydrochloric acid nrhiav tau

Txoj kev kuaj pom no tuaj yeem paub qhov txawv 403, 410, 41, 431, 440, 446 Stainless cov ntsiab lus nrog cov ntsiab lus Chromium

Dissolve cov qauv sib npaug ntawm cov qauv txiav tawm hauv cov ntim hydrochloric acid nrog 50% rau txog peb feeb, thiab sib piv cov xim siv ntawm kev daws. Cov hlau nrog cov ntsiab lus chromium ntau dua muaj xim tsaus nti.