Los ntawm kev ntxiv qee qhov ntawm qee yam alloying ntsiab lus rau cam khwb cia hlau, alloy cam khwb cia hlau nrog ntau dua corrosion kuj nyob rau hauv ib co xov xwm yuav tau. High silicon cam khwb cia hlau yog ib qho ntawm feem ntau siv. Ib tug series ntawm alloy cam khwb cia hlau uas muaj 10% mus rau 16% silicon yog hu ua siab silicon cam khwb cia hlau. Tsuas yog ob peb hom uas muaj 10% mus rau 12% silicon, cov ntsiab lus silicon feem ntau yog li ntawm 14% mus rau 16%. Thaum cov ntsiab lus silicon tsawg dua 14.5%, cov khoom siv kho tshuab tuaj yeem txhim kho, tab sis qhov kev tiv thaiv corrosion kuj txo qis heev. Yog hais tias cov ntsiab lus silicon nce mus txog ntau tshaj 18%, txawm hais tias nws yog corrosion-resistant, lub alloy yuav nkig heev thiab tsis haum rau casting. Yog li, feem ntau siv hauv kev lag luam yog siab silicon cam khwb cia hlau uas muaj 14.5% mus rau 15% silicon. [1]
Cov npe lag luam txawv teb chaws ntawm siab silicon cam khwb cia hlau yog Duriron thiab Durichlor (muaj molybdenum), thiab lawv cov tshuaj muaj pes tsawg leeg yog raws li qhia hauv qab no.
| qauv | Chemical Cheebtsam,% | ||||||
| silicon | molybdenum | chromium | manganese | sulfur | phosphorus | hlau | |
| High silicon cam khwb cia hlau | 14.25 Nws | — | — | 0.50 ~ 0.56 hli | 〈0.05 | 〈 0.1 | Nyob twj ywm |
| Molybdenum muaj cov silicon cam khwb cia hlau | 14.25 Nws | 〉 3 | 少量 | 0.65 ib | 〈0.05 | 〈 0.1 | Nyob twj ywm |
Corrosion kuj
Yog vim li cas yog vim li cas high-silicon cam khwb cia hlau nrog ib tug silicon ntsiab lus ntawm ntau tshaj 14% muaj zoo corrosion kuj yog hais tias silicon tsim ib tug tiv thaiv zaj duab xis muaj li ntawm tsis corrosion resistant.
Feem ntau hais lus, siab silicon cam khwb cia hlau muaj corrosion kuj zoo heev nyob rau hauv oxidizing media thiab tej yam uas txo cov acids. Nws tuaj yeem tiv taus ntau qhov kub thiab txias ntawm nitric acid, sulfuric acid, acetic acid, hydrochloric acid ntawm qhov kub thiab txias, fatty acids thiab ntau lwm yam xov xwm. corrosion. Nws tsis tiv taus corrosion los ntawm kev tshaj tawm xws li kub-kub hydrochloric acid, sulfurous acid, hydrofluoric acid, halogen, caustic alkali tov thiab molten alkali. Yog vim li cas rau qhov tsis muaj corrosion kuj yog vim hais tias cov zaj duab xis tiv thaiv nyob rau saum npoo yuav soluble nyob rau hauv qhov kev txiav txim ntawm caustic alkali, thiab ua gaseous nyob rau hauv qhov kev txiav txim ntawm hydrofluoric acid, uas rhuav tshem cov ntaub ntawv tiv thaiv.
Mechanical zog
High-silicon cam khwb cia hlau yog tawv thiab nkig nrog cov khoom siv tsis zoo. Nws yuav tsum tsis txhob muaj kev cuam tshuam thiab tsis tuaj yeem siv los ua cov hlab ntsha siab. Castings feem ntau tsis tuaj yeem machined dua li kev sib tsoo.
Machining kev ua tau zoo
Ntxiv qee cov ntsiab lus alloying rau siab silicon cam khwb cia hlau tuaj yeem txhim kho nws cov kev ua haujlwm zoo. Ntxiv lub ntiaj teb tsis tshua muaj magnesium alloy rau high-silicon cam khwb cia hlau uas muaj 15% silicon tuaj yeem ntxuav thiab degas, txhim kho cov qauv matrix ntawm cov cam khwb cia hlau, thiab spheroidize cov graphite, yog li txhim kho lub zog, corrosion kuj thiab kev ua haujlwm ntawm cov cam khwb cia hlau; rau casting Performance kuj tau txhim kho. Ntxiv nrog rau kev sib tsoo, qhov no high-silicon cam khwb cia hlau tseem tuaj yeem tig, tapping, drilled, thiab kho nyob rau hauv qee yam mob. Txawm li cas los xij, nws tseem tsis haum rau qhov txias txias thiab cua sov tam sim ntawd; nws cov corrosion kuj yog zoo dua li cov zoo tib yam high-silicon cam khwb cia hlau. , cov xov xwm yoog tau yog qhov zoo sib xws.
Ntxiv 6.5% mus rau 8.5% tooj liab rau siab silicon cam khwb cia hlau uas muaj 13.5% mus rau 15% silicon tuaj yeem txhim kho kev ua haujlwm zoo. Lub corrosion kuj zoo ib yam li cov zoo tib yam siab silicon cam khwb cia hlau, tab sis yog phem nyob rau hauv nitric acid. Cov khoom no yog tsim los ua cov twj impellers thiab lub tes tsho uas tiv taus corrosion thiab hnav. Lub machining kev ua tau zoo kuj tuaj yeem txhim kho los ntawm kev txo cov ntsiab lus silicon thiab ntxiv cov ntsiab lus alloying. Ntxiv chromium, tooj liab thiab tsis tshua muaj ntiaj teb cov ntsiab lus rau silicon cam khwb cia hlau uas muaj 10% mus rau 12% silicon (hu ua nruab nrab ferrosilicon) tuaj yeem txhim kho nws cov brittleness thiab processability. Nws tuaj yeem tig, drilled, tapped, thiab lwm yam, thiab nyob rau hauv ntau qhov kev tshaj tawm, qhov kev tiv thaiv corrosion tseem nyob ze rau ntawm high silicon cam khwb cia hlau.
Nyob rau hauv nruab nrab-silicon cam khwb cia hlau nrog silicon ntsiab lus ntawm 10% mus rau 11%, ntxiv rau 1% mus rau 2.5% molybdenum, 1.8% mus rau 2.0% tooj liab thiab 0.35% tsawg lub ntiaj teb cov ntsiab lus, lub machining kev ua tau zoo dua, thiab nws yuav tig thiab tiv taus. Lub corrosion kuj zoo ib yam li cov silicon cam khwb cia hlau siab. Kev xyaum tau ua pov thawj tias hom cam khwb cia hlau no yog siv los ua lub impeller ntawm dilute nitric acid twj tso kua mis hauv nitric acid ntau lawm thiab lub impeller ntawm sulfuric acid ncig twj tso kua mis rau chlorine kom qhuav, thiab cov nyhuv zoo heev.
Cov saum toj no-hais siab-silicon cam khwb cia hlau tsis zoo rau hydrochloric acid corrosion. Feem ntau, lawv tsuas tuaj yeem tiv thaiv corrosion nyob rau hauv qis-concentration hydrochloric acid ntawm chav tsev kub. Txhawm rau txhim kho corrosion kuj ntawm siab silicon cam khwb cia hlau hauv hydrochloric acid (tshwj xeeb tshaj yog kub hydrochloric acid), cov ntsiab lus molybdenum tuaj yeem nce ntxiv. Piv txwv li, ntxiv 3% mus rau 4% molybdenum rau siab silicon cam khwb cia hlau nrog silicon cov ntsiab lus ntawm 14% mus rau 16% tuaj yeem tau txais Molybdenum-muaj cov silicon cam khwb cia hlau yuav tsim molybdenum oxychloride tiv thaiv zaj duab xis nyob rau saum npoo ntawm cov casting hauv qab no. kev ua ntawm hydrochloric acid. Nws yog insoluble hauv hydrochloric acid, yog li ua rau nws muaj peev xwm tiv thaiv hydrochloric acid corrosion ntawm qhov kub thiab txias. Qhov kev tiv thaiv corrosion tseem tsis hloov pauv hauv lwm cov xov xwm. Qhov no high-silicon cam khwb cia hlau tseem hu ua chlorine-resistant cam khwb cia hlau. [1]
High silicon cam khwb cia hlau ua
High silicon cam khwb cia hlau muaj qhov zoo ntawm siab hardness (HRC = 45) thiab zoo corrosion kuj. Nws tau raug siv los ua cov khoom siv rau kev sib tsoo cov khoom sib txhuam hauv kev tsim tshuaj. Txij li cov hlau cam khwb cia muaj 14-16% silicon, yog ib qho nyuaj thiab nkig, muaj qee yam teeb meem hauv kev tsim nws. Txawm li cas los xij, los ntawm kev xyaum tsis tu ncua, nws tau raug pov thawj tias cov hlau silicon cam khwb cia hlau tseem tuaj yeem ua tau raws li qee qhov xwm txheej.
High silicon cam khwb cia hlau yog ua tiav ntawm lub tshuab dhos, lub spindle ceev yog tswj ntawm 70 ~ 80 rpm, thiab cov cuab yeej pub yog 0.01 hli. Ua ntej ntxhib tig, cov npoo casting yuav tsum tau muab pov tseg. Qhov siab tshaj plaws pub rau qhov ntxhib tig yog feem ntau 1.5 mus rau 2 hli rau cov khoom ua haujlwm.
Cov cuab yeej tig lub taub hau yog YG3, thiab cov khoom siv qia yog cov cuab yeej hlau.
Txoj kev txiav yog thim rov qab. Vim hais tias high-silicon cam khwb cia hlau yog nkig heev, kev txiav yog nqa tawm ntawm sab nraud mus rau sab hauv raws li cov khoom siv dav dav. Thaum kawg, cov ces kaum yuav chipped thiab cov npoo yuav chipped, ua rau lub workpiece yuav tsum scrapped. Raws li kev xyaum, rov qab txiav yuav siv tau kom tsis txhob chipping thiab chipping, thiab qhov kawg txiav tus nqi ntawm lub teeb riam yuav tsum me me.
Vim lub siab hardness ntawm high-silicon cam khwb cia hlau, lub ntsiab txiav ntug ntawm tig cov cuab yeej yog txawv los ntawm zoo tib yam tig cov cuab yeej, raws li qhia nyob rau hauv daim duab ntawm sab xis. Peb hom tig cov cuab yeej hauv daim duab muaj qhov tsis zoo rake cov ces kaum. Lub ntsiab txiav ntug thiab qhov thib ob txiav ntug ntawm lub cuab yeej tig muaj qhov sib txawv raws li kev siv sib txawv. Daim duab a qhia cov cuab yeej tig sab hauv thiab sab nraud, lub ntsiab deflection lub kaum sab xis A = 10 °, thiab lub kaum sab xis deflection B = 30 °. Daim duab b qhia txog qhov kawg tig lub cuab yeej, lub ntsiab declination lub kaum sab xis A = 39 °, thiab lub thib ob declination lub kaum sab xis B = 6 °. Daim duab C qhia lub bevel tig lub cuab tam, lub ntsiab deflection lub kaum sab xis = 6 °.
Drilling qhov hauv high-silicon cam khwb cia hlau feem ntau ua tiav ntawm lub tshuab tho txawv. Lub spindle ceev yog 25 mus rau 30 rpm thiab pub tus nqi yog 0.09 txog 0.13 hli. Yog hais tias qhov drilling txoj kab uas hla yog 18 mus rau 20 hli, siv cov cuab yeej steel nrog cov hardness siab dua los zom cov kauv zawj. (Qhov zawj yuav tsum tsis txhob tob dhau). Ib daim ntawm YG3 carbide yog embedded nyob rau hauv lub laum ntsis taub hau thiab hauv av rau ib lub kaum sab xis haum rau drilling cov ntaub ntawv, yog li ntawd drilling tau ncaj qha. Piv txwv li, thaum drilling ib lub qhov loj dua 20 hli, koj tuaj yeem ua ntej tho 18 mus rau 20 qhov, thiab tom qab ntawd ua ib lub laum me me raws li qhov xav tau. Lub taub hau ntawm lub laum me ntsis yog kos nrog ob daim carbide (YG3 cov khoom siv), thiab tom qab ntawd hauv av rau hauv ib lub voj voog. Loj lub qhov los yog tig nws nrog saber.
daim ntawv thov
Vim nws superior acid corrosion kuj, siab silicon cam khwb cia hlau tau dav siv rau tshuaj tiv thaiv corrosion. Qib feem ntau yog STSil5, uas yog siv los tsim cov twj tso kua qaub-resistant centrifugal twj, kav dej, yees, kub exchangers, ntim, li qub thiab cocks, thiab lwm yam.
Feem ntau hais lus, high-silicon cam khwb cia hlau yog nkig, yog li yuav tsum tau saib xyuas zoo thaum lub sij hawm installation, tu, thiab siv. Tsis txhob ntaus nrog rauj thaum lub sij hawm installation; Kev sib dhos yuav tsum yog qhov tseeb kom tsis txhob muaj kev ntxhov siab hauv zos; Kev hloov pauv ntawm qhov sib txawv ntawm qhov kub thiab txias los yog cua sov hauv zos yog txwv nruj thaum lub sijhawm ua haujlwm, tshwj xeeb tshaj yog thaum pib, nres lossis ntxuav, cua sov thiab cua txias yuav tsum qeeb; nws tsis tsim nyog siv los ua cov cuab yeej siv siab.
Nws tuaj yeem ua rau ntau yam corrosion-resistant centrifugal twj, Nessler lub tshuab nqus tsev twj, cocks, li qub, cov kav dej tshwj xeeb thiab cov yeeb nkab txuas, cov kav dej, venturi caj npab, cyclone separators, denitrification towers thiab bleaching towers, concentration furnaces thiab pre-ntxuav tshuab, thiab lwm yam. Hauv kev tsim cov concentrated nitric acid, qhov kub ntawm nitric acid yog siab li 115 txog 170 ° C thaum siv los ua kem stripping. Lub concentrated nitric acid centrifugal twj tso kua mis tswj nitric acid nrog ib tug concentration txog li 98%. Nws yog siv los ua cov khoom siv hluav taws xob sib txawv thiab ntim ntauwd rau cov kua qaub sib xyaw ntawm sulfuric acid thiab nitric acid, thiab yog qhov zoo. Cov cua kub cua sov rau cov roj av hauv kev tsim kho kom zoo, acetic anhydride distillation towers thiab benzene distillation yees rau triacetate cellulose ntau lawm, acid twj rau glacial acetic acid ntau lawm thiab kua sulfuric acid ntau lawm, nrog rau ntau yam kua qaub los yog ntsev tov twj thiab cocks, thiab lwm yam., yog tag nrho cov siv nyob rau hauv high-efficiency daim ntaub ntawv. Silicon cam khwb cia hlau.
High silicon tooj liab cam khwb cia hlau (GT alloy) yog resistant rau alkali thiab sulfuric acid corrosion, tab sis tsis rau nitric acid corrosion. Nws muaj alkali tsis kam zoo dua aluminium cam khwb cia hlau thiab siab hnav tsis kam. Nws tuaj yeem siv rau hauv cov twj, impellers thiab bushings uas muaj corrosive heev thiab raug slurry hnav.
Post lub sij hawm: May-30-2024
