ss304 ss316 tag nrho threaded pas nrig / xov bar / stud ntsia liaj qhov rooj tsum

Nyeem ntxiv:Catalog threaded rods

FIXDEX Factory2 ss304 ss316 tag nrho threaded pas nrig / threaded bar / stud bolt

FIXDEX Factory2 ss304 ss316 tag nrho threaded pas nrig / threaded bar / stud ntsia liaj qhov rooj rhiav

Yuav ua li cas txheeb xyuas qhov zoo ntawm stainless hlau threaded pas nrig / threaded bar / stud bolt?

1. Sib nqus nrhiav

Koj hais tias stainless hlau yog magnetic, txoj cai! Nws kuj muaj tseeb tias nws tsis yog hlau nplaum! Qhov tseeb, lawv yog qhov tseem ceeb sib txawv. Peb txhua tus paub tias stainless hlau tau muab faib ua austenitic stainless hlau thiab ferritic stainless hlau. Austenitic stainless hlau yog cov hlau tsis sib nqus, thaum ferritic stainless hlau yog cov hlau nplaum muaj zog. Los ntawm kev sim ntau, nws tau ua pov thawj tias austenitic stainless hlau yuav muaj cov hlau nplaum me me nyob rau hauv qee yam tshwj xeeb, tab sis nws tsis yog hlau nplaum nyob rau hauv ib txwm muaj.

2. Ua cov tshuaj nitric acid point test

Feem ntau, nws yog ib qho nyuaj rau kev paub qhov txawv ntawm 200 series, 300 series, 400 series thiab lwm yam stainless hlau nrog lub qhov muag liab qab. Qhov ntsuas nitric acid point test yog qhov kev sim siab tshaj plaws los ntsuas qhov kev tiv thaiv corrosion ntawm substrate. Feem ntau, 400 series yuav tsuas yog me ntsis corroded thaum lub sij hawm xeem, thaum lub 200 series stainless hlau nrog cov qis tshaj corrosion kuj yuav pom tseeb corrosion cim.

3. Kev sim hardness

Yog tias austenitic stainless hlau yuav qhia qee cov hlau nplaum thaum txias dov nyob rau hauv atmospheric siab, ces thawj qhov kev ntsuam xyuas hlau nplaum tsuas yog hais tsis raug; Yog li peb yuav tsum tau ua kom sov cov hlau tsis muaj zog txog li 1000-1100 ℃ thiab tom qab ntawd dej tua nws kom tshem tawm cov hlau nplaum ntawm austenitic stainless hlau thiab kuaj qhov nyuaj. Lub hardness ntawm austenitic stainless hlau feem ntau yog qis dua RB85

Ntxiv rau

Lub hardness ntawm 430, 430F thiab 466 steel yog tsawg dua Rc 24

Lub hardness ntawm 410, 414, 416 thiab 431 yog Rc36 ~ 43

Lub hardness ntawm high carbon 420, 420F, 440A, B, C thiab F steel yog Rc50 ~ 60

Yog tias qhov hardness yog Rc50 ~ 55, nws yuav yog 420 steel

Lub hardness ntawm quenched 440A thiab B qauv yog Rc55 ~ 60

Tus nqi Rc ntawm 60 lossis siab dua yog 440C steel.

4. Los ntawm kev tshuaj xyuas machining

Yog tias cov hlau tsis muaj hlau raug kuaj yog ncej-zoo li tus, nws raug nquahu kom coj nws mus rau lub tshuab dhos lossis CNC tshuab dhos rau kev tshuaj xyuas, tab sis tseem muaj kev txwv. Txoj kev no tsuas yog tsim rau cov hlau yooj yim-rau-txiav thiab cov qauv stainless hlau, xws li 303, 416, 420F, 430F, 440F. Hom hlau yog txheeb xyuas los ntawm cov duab ntawm txoj hlua tig. Hom no yooj yim-rau-txiav steel yuav emit ib tug tsis kaj siab tsw thaum tig nyob rau hauv ib tug qhuav lub xeev.

5. Phosphoric acid nrhiav tau

Qhov no yog ib txoj kev tshawb nrhiav uas peb siv ntau zaus hauv lub neej txhua hnub. Txoj kev no yog siv los paub qhov txawv ntawm chromium-nickel stainless hlau. Ntxiv cov concentrated phosphoric acid rau 0.5% sodium fluoride tov thiab kub rau 60-66 ℃.

6. Kev kuaj xyuas los ntawm tooj liab sulfate point

Txoj kev no tuaj yeem ntes cov pa roj carbon zoo tib yam thiab cov hlau tsis muaj steel. Qhov concentration ntawm tooj liab sulfate tov yuav tsum nyob nruab nrab ntawm 5% thiab 10%. Thaum poob rau ntawm cov hlau yuav tsum tau kuaj, ib txheej ntawm cov hlau tooj liab yuav tsim nyob rau saum npoo ntawm cov pa roj carbon zoo tib yam li ob peb vib nas this, thaum lub ntsej muag ntawm cov hlau tsis huv yuav tsis hloov pauv.

7. Sulfuric acid tov nrhiav kom tau

Txoj kev no tuaj yeem paub qhov txawv ntawm 302, 304, 316, thiab 317 stainless hlau. Npaj sulfuric acid nrog ib tug concentration ntawm 20% mus rau 30% thiab ib tug kub ntawm txog 70 ° C, thiab muab cov hlau mus kuaj rau hauv cov tshuaj. 302 thiab 304 stainless hlau yuav tsim cov npuas ntau thaum lawv ntsib cov tshuaj thiab yuav tig dub li ob peb feeb;

Ntawm qhov tsis sib xws, 316 thiab 317 stainless hlau yuav tsis pom cov tshuaj tiv thaiv loj hauv cov tshuaj, thiab qhov pib yuav tsis tig dub li ntawm 10 mus rau 15 feeb.

8. Cold acid point detection

Tib yam ntawm cov hlau tsis muaj hlau tuaj yeem paub qhov txawv los ntawm kev xau 20% sulfuric acid tov rau saum npoo ntawm cov qauv uas tau ua hauv av, polished, ntxuav lossis ntxhib polished.

Tso ob peb tee kua qaub rau ntawm qhov chaw ntawm txhua tus qauv. Nyob rau hauv qhov kev txiav txim ntawm cov kua qaub, 302 thiab 304 stainless steels muaj zog corroded thiab tig dub, qhia xim av-dub los yog dub, thiab ces ntsuab muaju yog tsim nyob rau hauv cov tshuaj;

316 stainless hlau corrodes maj mam thiab maj mam tig xim av-daj, ces tig xim av-dub, thiab thaum kawg tsim ib co lub teeb ntsuab dub crystals nyob rau hauv cov tshuaj; Cov tshuaj tiv thaiv saum toj no ntawm 317 stainless hlau pib qeeb dua.

9. Kev soj ntsuam los ntawm lub txim taws

Lub txim hluav taws xob yog siv los ntsuas qhov sib txawv ntawm cov hlau, cov hlau alloy steel thiab cov cuab yeej hlau, tab sis nws yog siv me me rau qhov txawv ntawm cov hlau tsis muaj steel. Txoj kev ntsuas hluav taws xob no tuaj yeem pab cov neeg ua haujlwm paub txog kev faib cov hlau tsis huv rau hauv plaub pawg loj, tab sis nws tsis yooj yim rau kev paub qhov txawv ntawm cov qib steel sib txawv.

Cov yam ntxwv ntawm lub xeev ntawm plaub pawg ntawm stainless hlau tshuab yog raws li nram no:

Chav Kawm A: 302, 303, 316 steel, ua rau luv liab sparks nrog ob peb diav rawg.

Chav Kawm B: 308, 309, 310 thiab 446 steel, ua rau luv luv tsaus liab sparks nrog ob peb diav rawg.

Chav Kawm C: 410, 414, 416, 430 thiab 431 steel, ua rau ntev dawb sparks nrog ob peb diav rawg.

Chav Kawm D: 420, 420F thiab 440A, B, C, F, tsim cov xim ci ntsa iab nrog pom tseeb flashes lossis ntev dawb sparks.

10. Los ntawm kev tshawb nrhiav hydrochloric acid

Txoj kev kuaj pom no tuaj yeem paub qhov txawv ntawm 403, 410, 416, 420 stainless hlau nrog cov ntsiab lus chromium tsawg los ntawm 430, 431, 440, 446 stainless hlau nrog cov ntsiab lus chromium siab.

Dissolve sib npaug ntawm cov qauv txiav hauv cov tshuaj hydrochloric acid nrog lub ntim ntim ntawm 50% li ntawm peb feeb, thiab sib piv cov xim siv ntawm cov tshuaj. Cov hlau nrog cov ntsiab lus chromium ntau dua muaj xim ntsuab tsaus.