[[TitleIndustry]]

Siv super stainless hlau nyob qhov twg?

Date:Jun 06, 2019

Kev faib tawm cov khoom thiab qhov ua tau zoo

Tsis zoo li micro-alloyed txheej txheem steel cov ntaub ntawv rau offshore platforms, cov ntaub ntawv tshwj xeeb cov hlau rau offshore platforms yog feem ntau high-alloy Ni-Cr lossis Cr-Ni-Mo-based stainless steels, super-stainless steels lossis corrosion-resistant alloys, uas feem ntau muaj siab ntsiab lus. Cov yam ntxwv ntawm etch sib npaug, siab purity thiab N alloying. Cov ntu ntawm cov ntug dej hiav txwv tau npaj los ntawm kev siv cov khoom siv loj no, xws li kev cia khoom thiab kev thauj mus los, txheej txheem xa dej, tsim kev kub ntxhov, cov cua sov sib hloov, cov roj hauv qhov dej, cov kav dej thiab cov ceg taw, feem ntau yog qhov muaj zog thiab siab ua kom tau raws li lawv tshwj xeeb kev pab cuam mob. Corrosive lossis ob qho tib si. Feem ntau, kev txhim kho corrosion thiab lub zog yog ob qhov tseem ceeb kev ua tau zoo rau cov ntaub ntawv tshwj xeeb hlau rau cov ntug hiav txwv. Nyob rau tam sim no, advanced tshwj xeeb cov qhab nia hlau rau txawv teb chaws offshore platform feem ntau muaj xws li super austenitic stainless hlau, super ferritic stainless hlau, high-lub zog austenitic tsis-sib nqus stainless hlau, npib tsib xee-raws li thiab hlau-npib tsib xee-raws li corrosion-resistant alloys, etc. sib txawv raws qhov tsim ntawm cov qauv tsim muaj ntau ntawm alloy.

(1) Cov Lus Qhia Siab Mo Cr-Ni-Mo super austenitic stainless hlau. Rau super austenitic stainless hlau, feem ntau nws muaj Cr siab, Ni cov ntsiab lus, qee yam Mo cov ntsiab lus (6% mus rau 7%), thiab muaj kev tiv thaiv zoo tshaj plaws hauv zos corrosion thiab teeb meem xeb ua haujlwm ntawm qhov siab dua, thiab pitting corrosion. Qhov sib npaug ntawm PREN tus nqi (Cr + 3.3Mo + 16N) feem ntau nce mus txog 30 lossis ntau dua, thiab qee cov ntaub ntawv tseem siab dua 50, uas ua kom muaj kev tiv thaiv zoo tshaj ntawm cov khoom siv. Tib lub sijhawm, tsim nyog N alloying ua rau nws ob qho siab. Lub zog thiab yas tawv.

(2) Npib tsib xee-based lossis npib tsib xee hlau raws li kev txhim kho corrosion alloys. Txog rau cov xim xaim lossis cov xim xaim hlau uas muaj cov xeb hlau tiv thaiv kev tiv thaiv, cov Cr, Ni, thiab Mo alloys muaj ntau dua hauv cov ntsiab lus, thiab muaj qhov tshwj xeeb ntau hauv zos corrosion tsis kam thiab kev nyuaj siab tshaj li super austenitic stainless hlau nyob hauv cov dej hiav txwv thiab cov xov xwm nyuaj ionic. Corrosion kev ua tau zoo. Nws tuaj yeem siv dav hauv cov roj thiab roj tshaj tawm, roj-dej sib cais lossis lwm cov txheej txheem xav tau tshuaj lom neeg ntau dua li cov raj xa dej, twj tso kua mis tawm thiab centrifuges.

(3) High nitrogen austenitic stainless hlau. Cov tsis tshua muaj siab N alloy cov ntsiab lus zoo heev txhim kho lub zog ntsuas ntawm cov khoom, uas ua rau nws muaj lub zog zoo heev hauv qab qhov kub thiab txias hauv chav. Vim tias siv Mn-N Ni los ua lub zog austenite stabilizing, nws yog qhov zoo hauv kev ua tau zoo. Muaj tus nqi qis dua. Vim muaj kev txhim kho txuas ntxiv mus ntawm nws cov alloy system hauv xyoo tsis ntev los no thiab ntxiv rau qee yam ntawm Mo cov ntsiab lus, nws tseem muaj cov kev tiv thaiv zoo hauv zos, kev txhim kho tsis tu ncua ntawm Cr cov ntsiab lus thiab txuas ntxiv kom txo C cov khoom, uas txhim kho qhov kev cuam tshuam corrosion intergranular ntawm cov khoom.


Tug: Cov txiav kev ntawm duplex stainless hlau

Tom ntej: Yuav ua li cas Hnav-resistant hlau yuav siv tau thiab yuav ua li cas kom lawv?