Nichrome-hlau: cov yam ntxwv thiab cov kev siv

Niaj hnub nimno technology txo nws hwj siab xav tau rau qhov kev kawm ntawm nws constituent ntaub ntawv txuam tus tiag tiag kev khiav hauj lwm tej yam kev mob. Ib tug ntawm cov high-tech alloys yog nichrome. Nyob ntawm tej thiab pab kiag li lawm uas muaj nws, yog resistant mus hostile yam lag luam.

Keeb kwm ntawm foundations

Cov hlau yog ib tug npib tsib xee-chromium compound, thiab variations ntxiv hlau, manganese, txhuas thiab silicon.

Keeb xeeb kuv muaj ob txoj kev los ntawm keeb kwm. Rooted nyob rau hauv kev tshawb fawb nyob rau hauv lub teb ntawm cov hlau alloying thiab modifying lawv lub zog. Ni thiab Kr - Cheebtsam ntawm high-zoo corrosion-resistant thiab thaum tshav kub kub resistant steels.

Raws li ib tug ob-feem hlau ntawm npib tsib xee thiab chromium, nws twb tshwm sim nyob 1906 nyob rau hauv lub teb chaws USA. Niaj hnub no thov ntau yam kev hloov kho, xws li ib tug peb-hlau-raws li.

Ntsiab zog

Cov khoom rau niaj hnub yeej ua cua sov rau tsev neeg thiab muaj kev siv yog undoubtedly nichrome hlau. Nws cov khoom ua tau raws li lub siab tshaj plaws hauj yuav tsum.

1. Hluav taws xob cov resistivity hauv 1100-1400 Ohm * m.
2. Melting point - txog 1400s, uas khiav lag luam ntawm 800-1100˚S. Tsis txhob rau cov lag luam nyob rau hauv lub muaj pes tsawg leeg. Yog li, cov hlau cov ntsiab lus thiaj li mus rau 850-900˚S, rau cov ntshiab binary nws yog 1100˚S.
3. Ceev 8000-8500 kg / m ^3.
4. High zog (σ _{nyob rau hauv} = 650-700 MPa); ntsuas muab nyob rau hauv acidic corrosive ib puag ncig thiab loj kub.
5. Zoo ductility ua ke nrog lub exponential hardness tso cai rau dov thiab nqus.

pom qhov txawv nta

Ntawm cov feem ntau nrov hluav taws xob khoom rau lub lag luam - Nichrome hlau. Lub resistivity ntawm no feem ntawm cov hluav taws xob yeej ua cua sov kws muaj, uas tso cai rau koj kom muaj ib tug dav thov.

Ib qho tseem ceeb feature ntawm cov hlau yog nws kuj kub oxidation thiab corrosive nyob rau hauv ib txwm tej yam kev mob. Ib tug tseem ceeb luag hauj lwm no yog ua si no chrome. Caij muab ib tug saum npoo coj mus rau ib tug oxide zaj duab xis, uas ua ib tug tiv nuj nqi. Nws yog lub luag hauj lwm rau lub sib nug xov tsaus xim cov khoom uas yog los hloov los ntawm ib tug yam ntxwv dawb-grey thaum lub sij hawm tus neeg kho tshuab kev tshem tawm ntawm lub oxidized txheej.

Nws yog ib nqi sau cia hais tias ncaj kev sib cuag nrog acids tseem txav nws, txawm ntau tshaj li qhov corrosion-resistant tungsten.

Ob-feem hlau muaj sib nqus. Lawv tshwm sim rau ntau yam kev hloov kho, tab sis muaj tsis muaj zog txaus ua tau zoo.

Nichrome hlau yog rugged, yuav tsis tau yooj yim los ntawm lub hwj chim.

Systematize cov lus qhia txog yuav ua li cas los mus txiav txim lub Nichrome hlau, mas yuav ua li cas kom paub qhov txawv nws los ntawm sab nraud los yog zoo li cov ntaub ntawv:

1. Dawb tshiab hlau, tsaus ntuj nti - yav tas los tsim.
2. Tsis zoo los yog negligible magnetic.
3. Rigidity.
4. Kev puas tsuaj los ntawm acids, oxidation stability nyob rau hauv tus ntawm siab kub.

cov khoom muaj npe nomenclature

Uas twb muaj lawm hom txawv nyob rau hauv muaj pes tsawg leeg, ua rau ntau yam Nichrome hlau. Cov hlau muaj ib tug thoob plaws siv, uas yog txiav txim los ntawm tus neeg thaj chaw ntawm txhua tus.

• Group 1 - resistor khoom: H20N80, H20N73YUM-VI, VI-N80HYUD, H15N60.
• Group 2 - Hlau cua kub hais txog domestic thiab muaj kev siv uas muaj cov yam ntxwv ntawm tshav kub kuj: H20N80-H-VI, H15N60-N, N-HN70YU, H20N80-H HN20YUS.
• Group 3 - rau cov lag luam nyob hauv kub txog li 900˚S: N50K10, Kh25N20.

Cov kab uas hla ntawm lub Nichrome hlau ntawm thawj pab pawg neeg yog 0,009-0,4 hli, thiab lub thib ob - 0,2-7,5 hli.

"Txhua xeem neeg" yog Cantal los yog fehrali - chromium alloys, txhuas thiab hlau. Lawv kuj yus siab hluav taws xob resistivity, ua hauj tshav kub tsis pub dhau 1250-1400˚S, tab sis tsawg txhim khu kev qha, albeit tsawg tus nqi (H23YU5, H13YU4, H23YU5T, H27YU5T, H15YU5).

deciphering nyiaj muas

Properties thiab daim ntawv thov ntawm cov khoom los ntawm nichrome yog txiav txim los ntawm nws cov tshuaj nyob tus yeees. Xav txog lub ntsiab sawv daws yuav.

• H20N73YUM-VI: chromium - 20% npib tsib xee - 73% txhuas - 3% molybdenum - 1.5% manganese - txog li 0.3% titanium - 0.05%, hlau - 2%, carbon - mus 0.05%; melted nrog ib lub tshuab nqus induction txoj kev;
• HN70YU-H: Cr - 27%, Ni - 70%, Al - 3%, Mn - txog li 0,3%, Cs - mus 0,03%, kav ywm - txog li 0,1%, Fe - 1.5% , C - 0.1%; rau hluav taws xob cua sov ntsiab;
• HN20YUS: Cr - 20%, Ni - 20%, Al - 1%, ZN - txog li 0,2%, Ca - txog li 0,1%, Si - 2,5%, Fe - 50%, C - 0, 08% - tso cua sov kom muaj furnaces.

hom ntawm cov khoom

Xaiv tej yam uas alloy uas yog yus muaj los ntawm siab zoo hauj thiab cov neeg kho tshuab cov yam ntxwv, yuav tsum tau grounded thiab tswj. Tshwj xeeb tshaj yog thaum nws tawm los rau tus nqi. Yog li ib tug high-tech thiab kim khoom yog nichrome hlau. GOST 8803-89, 12766.1-90, 12766.3-90, 12766.4-90 lub sij lub uas yuav tsum tau, nta thiab npav daim ntaub ntawv. Nyob rau hauv raws li cov qauv thiab nyob rau lub ntsej muag nta, cov hlau yog hais rau cov muag khoom nyob rau hauv daim ntawv ntawm hlau los yog kab xev, cov kev xaiv uas nyob rau txoj kab uas hla, ntoo khaub lig seem, ntev, kev siv.

Ib tug tsim qhov chaw yog dov rau industrial raug daim kab xev zigzag, coiled hlau.

khoom specification

Thaum xaiv cov khoom los ntawm nichrome yog ib qho tseem ceeb yuav tau xav txog cov hauv qab no nta:

• nominal resistivity;
• txoj kab uas hla, ntoo khaub lig seem thiab luj;
• tiag tiag impedance thiab kev khiav hauj lwm kub yog hom twg nyob ntawm lub cev tsis.

Lub nominal tseem ceeb ntawm cov yooj yim parametric yam ntxwv yog txiav txim los ntawm lub GOST thiab nyob ntawm seb tus qib thiab muaj pes tsawg leeg.

Nichrome hlau-inch txiav txim nws tus ntoo khaub lig-seem thiab coj hnyav skein lub hom phiaj kuj.

Yog li, tus luj ntawm lub hlau (nichrome) 100 meters Cov khoom no yog ncaj qha proportional rau nws loj, thiab txoj kab uas hla thiab lub sectional cheeb tsam - yog inversely xwm yeem mus rau lub sij kuj.

Cov kev khiav hauj lwm kub nyob tsis tau tsuas yog nyob rau hauv lub tshuaj nyob tus yeees, tab sis kuj nyob rau hauv lub parametric yam ntxwv.

Cov kab uas hla ntawm lub hlau raug ua los ntawm manufacturers, nws yog nyob rau hauv 0,05-12 hli thiab tapes - 0,15-3,2 hli.

daim ntawv thov

Zoo ib txwm nrhiav pov thawj rau nqi. Tib yam siv rau lub Nichrome hlau. Hlau thiab ib daim hlab ntawm no cov ntaub ntawv uas yog lug siv nyob rau hauv cov cheeb tsam nyob qhov twg lwm yam co yuav tsis hloov lawv. High hluav taws xob kuj, oxidation kuj, high-zoo txhua yam khoom, xws li corrosive npuas, kub khiav hauj lwm tej yam kev mob - tag nrho cov no yuav siv tau nyob rau hauv ntau yam teb.

Nyob rau hauv lub lag luam:

• Thermocouples metallurgic fais furnaces.
• Lub Khoos Loos Tsev hais txog induction hlau-melting cov khoom.
• Muaj cua kom qhuav.
• Qhov ntawm boilers thiab tshav kub exchangers.
• Hluav taws xob cov ntau lawm: resistors thiab rheostats.
• Ib txhia electrodes rau welding.
• Tib thiab multi-neeg xyuas pib hluav taws xob nyob ntawm tej.

Nws yog lub ntsiab yam ntxwv feem ntawm tag nrho cov niaj hnub khoom siv:

• Cua sov ntsiab nyob rau hauv hluav taws xob kettles, cua sov siv dej, boilers, cua sov.
• Cua sov ntsiab nyob rau hauv cov plaub hau dryers, curling irons, irons.
• Automotive taws tswm ciab thiab lub cua sov.
• Hauv cov luam yeeb.

Tej zaum tus nqi - tsuas yog drawback Nichrome khoom. Hlau bicomponent hom npib tsib xee-chromium yuav kim kim. Cov ntsiab lus ntawm cov hlau thiab txo cov nqi ntawm cov npib tsib xee, nyob rau hauv lem, tswj ib tug txo nqi, tiam sis tsis txhob muab lub caij uas Cr20Ni80. Cov kev xaiv nyob rau cov kev uas yuav tsum tau.

Xaiv cov khoom ntawm nichrome tau ua hauj lwm nrog cov ntaub ntawv nyob rau hauv lub tshuaj nyob tus yeees ntawm kev txaus siab mus rau lub hom, nws hluav taws xob conductivity thiab tsis kam, yam ntxwv lub cev ntawm txoj kab uas hla, ntoo khaub lig-sectional ntev. Ho xav nyob rau hauv cov ntaub ntawv, raws li tau zoo raws li yuav tsum tau visually paub qhov txawv cov hlau los ntawm nws cov "competitors". Kom xaiv cov ntaub ntawv uas - tus yuam sij rau lub ntseeg ntawm cov khoom thiab cuab yeej ntawm nws cov koom tes.