Cov yam ntxwv tseem ceeb ntawm stainless hlau

Weldability
Cov kev xav tau rau kev ua haujlwm vuam sib txawv rau cov khoom sib txawv. Chav Kawm I tableware feem ntau tsis tas yuav tsum muaj kev ua haujlwm vuam, thiab tseem suav nrog qee lub lag luam lauj kaub. Txawm li cas los xij, cov khoom lag luam feem ntau xav tau kev ua haujlwm zoo ntawm cov khoom siv raw, xws li cov khoom siv hauv chav kawm thib ob, lub khob rwb thaiv tsev, cov yeeb nkab steel, lub rhaub dej, lub tshuab nqus dej, thiab lwm yam.
Corrosion kuj
Cov khoom siv stainless hlau feem ntau xav tau kev tiv thaiv corrosion zoo, xws li Chav Kawm I thiab Chav Kawm II cov khoom siv hauv chav ua noj, chav ua noj, chav dej, chav dej, thiab lwm yam. Qee cov tub lag luam txawv teb chaws kuj ua cov tshuaj tiv thaiv corrosion ntawm cov khoom: kub NACL aqueous tov rau boiling, ncuav tawm lub tshuaj tom qab ib lub sij hawm ntawm lub sij hawm, ntxuav thiab qhuav, thiab luj lub yuag poob, los txiav txim qhov degree ntawm corrosion (ceeb toom: thaum polishing cov khoom, xeb me ntsis yuav tshwm nyob rau saum npoo thaum lub sij hawm xeem vim cov ntsiab lus ntawm Fe nyob rau hauv daim ntaub abrasive. los yog abrasive ntawv)
Polishing kev ua tau zoo
Nyob rau hauv lub neej niaj hnub no, stainless hlau cov khoom yog feem ntau polished thaum lub sij hawm ntau lawm. Tsuas yog ob peb yam khoom, xws li lub tshuab rhaub dej, cov khoom siv dej, tsis tas yuav polishing. Yog li ntawd, nws yuav tsum tau zoo polishing kev ua tau zoo ntawm raw cov ntaub ntawv. Cov yam tseem ceeb cuam tshuam rau kev ua haujlwm polishing yog raws li hauv qab no:
① Cov khoom tsis zoo ntawm cov khoom siv raw. Xws li khawb, pits, ntau pickling, thiab lwm yam.
② Cov teeb meem ntawm cov khoom siv raw. Yog hais tias lub hardness tsawg dhau lawm, nws tsis yooj yim rau polish (BQ cov cuab yeej tsis zoo), thiab yog tias qhov hardness tsawg dhau lawm, nws yooj yim pom cov txiv kab ntxwv tev ntawm qhov chaw thaum sib sib zog nqus nqus, yog li cuam tshuam rau cov cuab yeej BQ. BQ nrog siab hardness kuj zoo.
③ Tom qab kos duab sib sib zog nqus, me me dub me me thiab RIDGING tseem yuav tshwm sim rau ntawm qhov chaw nrog deformation zoo, yog li cuam tshuam rau cov cuab yeej BQ.
Thaum tshav kub kub kuj
Thaum tshav kub kub kuj yog hais txog lub cev thiab txhua yam khoom zoo heev ntawm stainless hlau ntawm qhov kub thiab txias.
Cov txiaj ntsig ntawm cov pa roj carbon: cov pa roj carbon yog cov khoom siv 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 lub zog ntawm austenitic stainless hlau tuaj yeem txhim kho tau zoo los ntawm kev daws teeb meem. Cov pa roj carbon kuj tuaj yeem txhim kho qhov kev ntxhov siab thiab kev tiv thaiv corrosion ntawm austenitic stainless hlau hauv cov tshuaj chloride siab heev (xws li 42 feem pua ​​​​MgCl2 boiling tov).
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 nyob rau hauv qee qhov xwm txheej (xws li vuam lossis cua sov ntawm 450 ~ 85{11}} degree ) hauv kev siv cov hlau tsis xeb, cov pa roj carbon tuaj yeem tsim high-chromium Cr23C6 carbon compound nrog chromium. nyob rau hauv cov hlau, ua rau lub zos chromium depletion, uas 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 Cr-Ni austenitic stainless hlau txij li xyoo 1960s yog cov roj carbon tsawg uas muaj cov ntsiab lus tsawg dua 0.03 feem pua ​​lossis 0.02 feem pua. Nws tuaj yeem paub tias nrog kev txo qis ntawm cov ntsiab lus carbon, qhov cuam tshuam ntawm cov hlau rau intergranular corrosion txo. Thaum cov ntsiab lus carbon tsawg dua 0.02 feem pua, qhov pom tseeb tshaj plaws yuav ua tiav. Qee qhov kev sim kuj tau taw qhia tias cov pa roj carbon kuj tseem yuav ua rau muaj kev nyiam ntawm pitting corrosion ntawm Cr-Ni austenitic stainless hlau. Vim tias muaj kev phom sij ntawm cov pa roj carbon monoxide, tsis yog tsuas yog cov ntsiab lus carbon yuav tsum tau tswj kom tsawg li sai tau hauv cov txheej txheem ntawm austenitic stainless hlau smelting, tab sis kuj carburization ntawm stainless hlau nto thiab nag lossis daus ntawm chromium carbide yuav tsum tau tiv thaiv nyob rau hauv lub tom ntej kub. , kev ua haujlwm txias thiab kev kho cua sov.
Corrosion kuj
Thaum tus naj npawb ntawm chromium atoms nyob rau hauv cov hlau tsis tsawg tshaj li 12.5 feem pua, cov electrode muaj peev xwm ntawm cov hlau yuav dheev hloov los ntawm tsis zoo muaj peev xwm mus rau zoo electrode muaj peev xwm. Tiv thaiv electrochemical corrosion.