Tuam Tshoj Professional 6 Stainless Hlau Yeeb Nkab - 904L seamless steel yeeb nkab - Huaxin

1. Cov lus piav qhia yooj yim:

904L super austenitic stainless hlau yog cov pa roj carbon tsawg, siab nickel, molybdenum austenitic stainless acid resistant hlau.

GB qib: 00Cr20Ni25Mo4.5Cu

International Qib: 904L

American standard Qib: UNS: N08904

EN Qib: 1.4539

Qhov ntau thiab tsawg: 10 * 2mm txog 219 * 15mm lossis customized raws li tus neeg thov kev thov

Ntev Ntev: 300mm txog 20000mm

2. Tshuaj muaj pes tsawg leeg:

3. Mechanical Properties:

4.904L Nqe lus piav qhia:

1) Super austenitic stainless hlau 904L (00Cr20Ni25Mo4.5Cu; UNS: N08904; EN: 1.4539) yog

high alloy austenitic stainless hlausteel nrog tsawg carbon cov ntsiab lus.

Nws muaj qhov zoo corrosion kuj nyob rau hauv dilute sulfuric acid thiab yog tshwj xeeb tsim los rau ib puag ncig

nrog hnyav corrosion. Nws muaj cov ntsiab lus siab chromium thiab cov ntsiab lus nickel txaus. Qhov sib ntxiv ntawm tooj liab ua rau nws muaj

muaj zog acid kuj, tshwj xeeb tshaj yog muaj zog tiv thaiv chloride interstitial corrosion thiab kev nyuaj siab corrosion cracking. Nws tsis yooj yim los tshwm

corrosion kuj thiab tawg. Nws tsis kam rau pitting corrosion yog me ntsis zoo dua li ntawm lwm cov hlau. Nws muaj kev ua tau zoo thiab

weldability, thiab tuaj yeem siv rau cov hlab ntsha siab.

2) Metallographic qauv ntawm 904L stainless hlau:

904L yog cov qauv austenitic kiag li. Piv nrog rau cov zoo tib yam austenitic stainless hlau nrog siab molybdenum cov ntsiab lus,

904L muaj qhov cuam tshuam loj rau ferrite thiab α Cov nag lossis daus ntawm theem tsis rhiab heev.

a. Lub cev thiab mechanical zog:

Qhov ceev: 8.0g / cm3. Lub zog tensile: σ b≥520Mpa. Elongation: δ ≥35%. Corrosion kuj ntawm 904L stainless hlau:

Vim tias cov ntsiab lus carbon ntawm 904L tsawg heev (ntau tshaj 0.020%), yuav tsis muaj carbide nag lossis daus nyob rau hauv dav dav.

kev kho cua sov thiab vuam tej yam kev mob. Qhov no tshem tawm txoj kev pheej hmoo ntawm intergranular corrosion tom qab kev kho cua sov thiab vuam.

Vim tias cov ntsiab lus siab ntawm chromium, npib tsib xee thiab molybdenum thiab qhov sib ntxiv ntawm tooj liab, 904L tuaj yeem passivated txawm tias txo qis.

ib puag ncig, xws li sulfuric acid thiab formic acid.

Cov ntsiab lus siab nickel ua rau nws muaj qhov tsis tshua muaj corrosion hauv lub xeev nquag. Nyob rau hauv lub concentration ntau ntawm 0 ~ 98% ntawm ntshiab sulfuric acid,

Kev siv kub ntawm 904L tuaj yeem siab txog 40 ℃. Lub corrosion kuj ntawm ntshiab phosphoric acid nyob rau hauv lub concentration ntawm 0 ~ 85% yog

zoo heev.

Hauv kev lag luam phosphoric acid uas tsim los ntawm cov txheej txheem ntub dej, impurities muaj kev cuam tshuam rau corrosion kuj. Ntawm txhua yam

ntawm phosphoric acid, 904L muaj kev tiv thaiv corrosion zoo dua li cov hlau tsis zoo tib yam. Nyob rau hauv muaj zog oxidizing nitric acid, corrosion kuj ntawm 904L

yog qis dua cov hlau alloyed siab tsis muaj molybdenum. Hauv hydrochloric acid, kev siv 904L yog txwv rau 1-2% ntawm qis concentration.

Nyob rau hauv cov ntaub ntawv no concentration. Lub corrosion kuj ntawm 904L yog zoo dua li cov pa stainless hlau. 904L steel muaj kev tiv thaiv siab rau

qhov chaw corrosion.

Nyob rau hauv cov tshuaj chloride, nws cov crevice corrosion kuj kuj zoo heev. Cov ntsiab lus npib tsib xee siab ntawm 904L txo tus nqi corrosion hauv pits thiab crevices.

Thaum qhov kub ntawm qhov zoo tib yam austenitic stainless hlau siab tshaj 60 ℃, nws yuav ua rau muaj kev ntxhov siab corrosion hauv cov chloride nplua nuj.

ib puag ncig.

Qhov rhiab heev no tuaj yeem raug txo los ntawm kev nce cov ntsiab lus nickel ntawm stainless hlau. Vim yog cov ntsiab lus siab nickel, 904L muaj kev tiv thaiv siab rau

kev nyuaj siab corrosion cracking nyob rau hauv cov tshuaj chloride, concentrated hydroxide tov thiab hydrogen sulfide nplua nuj ib puag ncig.

Txhawb cov khoom siv vuam: vuam pas nrig (E385-16/17), vuam hlau (ER385).

b. Kev ceev faj rau kev siv 904L:

1. Kev ua tau zoo

1.1 Welding kev ua tau zoo

Zoo li cov hlau tsis zoo tib yam, 904L tuaj yeem welded los ntawm ntau txoj kev vuam. Txoj kev welding feem ntau yog phau ntawv arc vuam lossis

inert gas shielded vuam.

Cov electrode lossis hlau hlau yog ua raws li cov khoom siv ntawm cov hlau puag thiab muaj purity ntau dua. Cov ntsiab lus molybdenum yuav tsum yog

siab tshaj lub hauv paus hlau.

Preheating feem ntau tsis tas yuav tsum tau ua ntej welding, tab sis nyob rau hauv txias sab nraum zoov ua haujlwm, kom tsis txhob condensation ntawm dej vapor, pob qij txha los yog nyob ib sab.

thaj chaw tuaj yeem ua kom sov sib npaug.

Qhov kub hauv zos yuav tsum tsis pub tshaj 100 ℃ kom tsis txhob muaj cov pa roj carbon monoxide thiab intergranular corrosion. Me linear zog, nruam

thiab ceev vuam tus nqi yuav tsum tau saws thaum lub sij hawm vuam.

Feem ntau, kev kho cua sov tsis tas yuav tsum tau tom qab vuam. Yog xav tau kev kho cua sov, nws yuav tsum tau rhuab mus rau 11000 ~ 1150 ℃ thiab ces txias sai sai.

1.2 Machining kev ua tau zoo

Cov yam ntxwv machining ntawm 904L zoo ib yam li lwm cov austenitic stainless hlau. Muaj ib qho kev nyiam ntawm cov cuab yeej sticking thiab ua hauj lwm hardening thaum lub sij hawm ua.

Cov cuab yeej carbide nrog lub kaum sab xis zoo yuav tsum tau siv, thiab cov roj sulfurized thiab chlorinated yuav tsum tau siv los ua cov khoom ua kom txias. Cov khoom siv thiab txheej txheem yuav tsum nyob ntawm qhov chaw

txo ua hauj lwm hardening. Kev txiav qeeb qeeb thiab pub tus nqi yuav tsum zam thaum txiav.

5. Muaj feem xyuam:

6. Kev kho mob ntxiv

1) Polish

2) Marking:

7. Packing thiab Loading:

8. Daim ntawv thov:

904L yog siv rau hauv cov nram qab no:

* Petroleum thiab petrochemical khoom, xws li reactors hauv petrochemical khoom.

* Cov khoom siv khaws cia thiab kev thauj mus los ntawm sulfuric acid, xws li cov khoom siv hluav taws xob.

* Cov khoom siv hluav taws xob flue desulfurization ntawm lub tshuab hluav taws xob feem ntau yog siv rau hauv lub cev absorber, flue, shutter, internals, spraying system, thiab lwm yam.

* Scrubber thiab kiv cua hauv organic acid kho system.

* Hiav txwv dej kho nroj tsuag, dej hiav txwv dej kub exchanger, ntawv kev lag luam khoom, sulfuric acid thiab nitric acid khoom, acid ua,

kev lag luam tshuaj thiab lwm yam khoom siv tshuaj, cov hlab ntsha siab, khoom noj khoom haus.

* Pharmaceutical Hoobkas: centrifuge, reactor, thiab lwm yam.

* Zaub mov: lauj kaub kua ntses, ua cawv txiv hmab, ntsev lauj kaub, khoom siv thiab hnav khaub ncaws.

* 904L yog cov hlau sib txuam rau dilute sulfuric acid muaj zog corrosive nruab nrab.