Ferroboron yog cov hlau alloy uas muaj boron thiab hlau, feem ntau yog siv hauv cov hlau thiab cam khwb cia hlau.Ntxiv 0.07% B rau cov hlau tuaj yeem txhim kho qhov hardenability ntawm cov hlau.Boron ntxiv rau 18% Cr, 8% Ni stainless hlau tom qab kev kho mob tuaj yeem ua rau nag lossis daus hardening, txhim kho qhov kub thiab txias zog.Boron nyob rau hauv cam khwb cia hlau yuav cuam tshuam rau graphitization, yog li ua rau qhov tob ntawm lub qhov dawb kom nws nyuaj thiab hnav resistant.Ntxiv 0.001% ~ 0.005% boron rau malleable cam khwb cia hlau yog qhov zoo rau kev tsim spheroidal number case thiab txhim kho nws cov kev faib tawm.Tam sim no, qis aluminium thiab qis carbon hlau boron yog cov ntaub ntawv tseem ceeb rau amorphous alloys.Raws li GB5082-87 tus qauv, Tuam Tshoj cov hlau boron tau muab faib ua cov pa roj carbon tsawg thiab cov pa roj carbon nruab nrab ob pawg ntawm 8 qib.Ferroboron yog ib qho khoom siv ntau yam uas muaj hlau, boron, silicon thiab txhuas.
Ferric boron yog lub zog deoxidizer thiab boron ntxiv tus neeg sawv cev hauv steelmaking.Lub luag haujlwm ntawm boron nyob rau hauv cov hlau yog txhawm rau txhim kho lub hardenability thiab hloov ntau cov ntsiab lus alloying nrog tsuas yog ib qho me me ntawm boron, thiab nws kuj tuaj yeem txhim kho cov cuab yeej cuab tam, txias deformation zog, vuam zog thiab kub siab.
Raws li cov ntsiab lus carbon ntawm boron hlau tuaj yeem muab faib ua qib qis carbon thiab nruab nrab carbon qib ob pawg, ntsig txog rau qib sib txawv ntawm cov hlau.Cov tshuaj muaj pes tsawg leeg ntawm ferric boron yog teev nyob rau hauv Table 5-30.Tsawg carbon hlau boride yog tsim los ntawm txoj kev thermit thiab muaj cov ntsiab lus siab ntawm txhuas.Cov pa roj carbon boron nruab nrab yog tsim los ntawm cov txheej txheem silicothermic, nrog cov ntsiab lus aluminium tsawg thiab cov ntsiab lus siab carbon.Cov hauv qab no yuav qhia cov ntsiab lus tseem ceeb thiab keeb kwm ntawm kev siv hlau boron.
Ua ntej, cov ntsiab lus tseem ceeb ntawm kev siv hlau boron
Thaum siv hlau boride, cov ntsiab lus hauv qab no yuav tsum tau sau tseg:
1. Tus nqi ntawm boron hauv hlau boron tsis sib xws, thiab qhov sib txawv loj heev.Cov boron loj feem muab rau hauv tus qauv yog los ntawm 2% mus rau 6%.Yuav kom tswj tau cov ntsiab lus boron kom raug, nws yuav tsum tau muab tso rau hauv lub tshuab nqus tsev vacuum ua ntej siv, thiab tom qab ntawd siv tom qab kev tshuaj xyuas;
2. Xaiv cov qib tsim nyog ntawm cov hlau boride raws li cov hlau smelting.Thaum smelting high-boron stainless hlau rau nuclear fais fab nroj tsuag, tsawg carbon, tsawg txhuas, tsawg phosphorus hlau boron yuav tsum tau xaiv.Thaum smelting boron-muaj alloy structural steel, nruab nrab carbon qib hlau boride tuaj yeem xaiv tau;
3. Tus nqi rov qab ntawm boron hauv hlau boride txo qis nrog kev nce ntawm cov ntsiab lus boron.Txhawm rau kom tau txais txiaj ntsig zoo dua, nws yog qhov zoo dua los xaiv cov hlau boride nrog cov ntsiab lus boron tsawg.
Thib ob, keeb kwm ntawm hlau boron
British David (H.Davy) thawj zaug los tsim boron los ntawm electrolysis.H.Moissan tau tsim cov pa roj carbon siab borate hauv lub tshuab hluav taws xob hluav taws xob hauv xyoo 1893. Nyob rau xyoo 1920 muaj ntau daim ntawv pov thawj rau kev tsim cov hlau boride.Txoj kev loj hlob ntawm amorphous alloys thiab cov khoom siv hlau nplaum ruaj khov nyob rau xyoo 1970 tau nce qhov kev thov rau hlau boride.Nyob rau xyoo 1950s, Tuam Tshoj lub koom haum Beijing Iron thiab Steel Research Institute tau ntse tsim hlau boride los ntawm txoj kev thermit.Tom qab ntawd, Jilin, Jinzhou, Liaoyang thiab lwm yam khoom loj, tom qab xyoo 1966, feem ntau yog los ntawm Liaoyang ntau lawm.Xyoo 1973, hlau boron tau tsim los ntawm hluav taws xob rauv hauv Liaoyang.Xyoo 1989, cov hlau tsis tshua muaj txhuas-boron tau tsim los ntawm txoj kev siv hluav taws xob.
Post lub sij hawm: Nov-17-2023