Weldability
Cov khoom siv sib txawv muaj cov kev xav tau sib txawv rau kev ua haujlwm vuam. Qeb I tableware feem ntau tsis tas yuav tsum muaj kev ua haujlwm vuam, txawm tias qee lub tuam txhab lub lauj kaub. Tab sis cov khoom lag luam feem ntau xav tau cov ntaub ntawv raw nrog kev ua haujlwm zoo vuam, xws li cov khoom siv thib ob, cov khob thermos, cov kav dej steel, lub tshuab rhaub dej, cov khoom siv dej, thiab lwm yam.
Corrosion kuj
Cov khoom siv stainless hlau feem ntau yuav tsum muaj kev tiv thaiv corrosion zoo, xws li Chav Kawm I thiab II cov tais diav, cov tais diav hauv chav ua noj, lub rhaub dej, cov dej haus, thiab lwm yam. Qee cov neeg ua lag luam txawv teb chaws kuj ua cov tshuaj tiv thaiv corrosion ntawm lawv cov khoom: kub NACL aqueous tov kom txog thaum nws boils, thiab ncuav. nws tom qab lub sijhawm. Tshem tawm cov tshuaj, ntxuav thiab qhuav, thiab ntsuas qhov hnyav los txiav txim siab txog qib ntawm corrosion (Ceeb toom: Thaum polishing cov khoom, Fe tivthaiv hauv daim ntaub emery lossis ntawv xuab zeb yuav ua rau cov pob zeb xeb tshwm rau ntawm qhov chaw thaum lub sijhawm kuaj)
Thaum tus naj npawb ntawm chromium atoms hauv cov hlau tsis tsawg dua 12.5%, lub peev xwm electrode ntawm cov hlau tuaj yeem hloov pauv tam sim ntawd los ntawm qhov tsis zoo rau qhov zoo electrode. Tiv thaiv electrochemical corrosion.
Polishing kev ua tau zoo
Nyob rau hauv lub neej niaj hnub no, stainless hlau cov khoom feem ntau mus los ntawm cov txheej txheem polishing thaum lub sij hawm tsim khoom. Tsuas yog ob peb yam khoom, xws li lub tshuab rhaub dej thiab cov khoom siv dej hauv ob sab phlu, tsis tas yuav polishing. Yog li ntawd, qhov no xav tau cov khoom siv raw kom muaj kev ua haujlwm zoo polishing. Cov yam ntxwv uas cuam tshuam rau kev ua haujlwm polishing feem ntau suav nrog cov ntsiab lus hauv qab no:
① Cov khoom tsis zoo ntawm cov khoom siv raw. Xws li khawb, pitting, pickling, thiab lwm yam.
② Raw khoom teeb meem. Yog tias qhov hardness tsawg dhau, nws yuav nyuaj rau polish thaum polishing (cov khoom tsis zoo BQ). Ntxiv mus, yog tias qhov hardness tsawg dhau, qhov tshwm sim ntawm txiv kab ntxwv tev yuav yooj yim tshwm sim ntawm qhov chaw thaum lub sij hawm sib sib zog nqus nqus, yog li cuam tshuam rau BQ cov khoom. BQ nrog siab hardness kuj zoo.
③Rau cov khoom uas tau dhau los ua cov duab sib sib zog nqus, cov xim dub me me thiab RIDGING yuav tshwm sim rau ntawm qhov chaw hauv thaj chaw uas muaj deformation zoo, yog li cuam tshuam rau BQ cov khoom.
Thaum tshav kub kub kuj
Thaum tshav kub kub tsis kam yog hais txog lub peev xwm ntawm stainless hlau los tuav nws cov khoom zoo heev ntawm lub cev thiab cov khoom siv hauv qab kub.
Cov nyhuv ntawm cov pa roj carbon monoxide: Cov pa roj carbon monoxide yog ib yam khoom uas muaj zog tsim thiab ruaj khov austenite thiab nthuav dav austenite cheeb tsam hauv austenitic stainless hlau. Lub peev xwm ntawm carbon los tsim austenite yog li 30 npaug ntawm npib tsib xee. Cov pa roj carbon monoxide yog cov khoom sib txuam thiab tuaj yeem txhim kho lub zog ntawm austenitic stainless hlau los ntawm cov khoom siv ntxiv dag zog. Cov pa roj carbon kuj tuaj yeem txhim kho qhov kev ntxhov siab-corrosion tsis kam ntawm austenitic stainless hlau hauv cov tshuaj chlorides siab heev (xws li 42% MgCl2 boiling solution).
Txawm li cas los xij, hauv austenitic stainless hlau, carbon feem ntau suav hais tias yog ib qho teeb meem. Qhov no feem ntau yog vim qhov tseeb tias nyob rau hauv qee qhov xwm txheej hauv kev siv cov hlau tsis xeb (xws li vuam lossis cua sov ntawm 450 ~ 850 degree), carbon tuaj yeem cuam tshuam nrog cov hlau. Chromium cov ntaub ntawv high-chromium Cr23C6 carbon compounds, uas ua rau lub zos depletion ntawm chromium thiab txo cov corrosion kuj ntawm steel, tshwj xeeb tshaj yog tsis kam mus rau intergranular corrosion. yog li ntawd. Feem ntau ntawm cov tsim tshiab chromium-nickel austenitic stainless hlau txij li thaum 1960s yog ultra-low carbon hom nrog cov ntsiab lus carbon tsawg dua 0.03% lossis 0.02%. Nws tuaj yeem paub tias vim tias cov ntsiab lus ntawm cov pa roj carbon tsawg tsawg, qhov sib txawv ntawm corrosion rhiab heev ntawm cov hlau txo. Thaum cov ntsiab lus carbon qis dua Tsuas yog 0.02% muaj qhov pom tseeb tshaj plaws. Qee qhov kev sim kuj tau taw qhia tias cov pa roj carbon kuj tseem yuav ua rau muaj kev cuam tshuam ntawm pitting corrosion ntawm chromium austenitic stainless hlau. Vim tias muaj kev phom sij ntawm cov pa roj carbon monoxide, tsis yog tsuas yog yuav tsum tswj cov ntsiab lus ntawm cov pa roj carbon tsawg li sai tau thaum lub sij hawm smelting ntawm austenitic stainless hlau, tab sis kuj yuav tsum tau tiv thaiv carbonization ntawm stainless hlau thiab chromium carbides thaum lub sij hawm tom ntej kub, txias ua hauj lwm thiab cov txheej txheem kho cua sov. Precipitate.
