Lub hauv paus ntsiab lus ua haujlwm thiab cov kauj ruam ua haujlwm ntawm lub qhov cub ua haujlwm

1. Lub hauv paus ntsiab lus ua haujlwm
Ahluav taws kubyog lub cub hluav taws xob uas siv Joule cov cua sov tsim los ntawm qhov tam sim no dhau los ntawm tus neeg xyuas pib ua qhov cua sov.
Lub qhov cub hluav taws xob siv hluav taws xob ua hluav taws xob ua hluav taws xob ua hluav taws xob, hloov hluav taws xob hluav taws xob mus rau lub zog hluav taws xob los ntawm hluav taws xob cua sov cov ntsiab lus, thiab ua kom sov hlau hauv qhov cub. Lub qhov cub ua haujlwm muaj qhov ua haujlwm siab thermal piv rau cov nplaim taws, uas tuaj yeem ncav cuag 50-80℅. Cov txheej txheem thermal yog yooj yim los tswj, kev ua haujlwm zoo, thiab lub tshuab ua kom sov lub neej ntev. Nws yog tsim rau cua sov workpieces uas yuav tsum tau nruj, tab sis lub zog noj yog siab. Raws li lub tshav kub hloov lwm lub tsev, cov cua sov kuj tau muab faib ua hluav taws xob tsis kam rauv thiab convection resistance furnaces. Cov hluav taws xob tiv thaiv hluav taws xob feem ntau yog siv hluav taws xob hloov hluav taws xob, thiab cov hluav taws xob hloov hluav taws xob yog me me; convection kuj furnaces mas siv convective tshav kub hloov, feem ntau hu ua cua circulation kuj furnaces, uas cia siab rau cov cua kub rau cua sov, thiab lub cub tawg kub yog feem ntau qis dua 650 degree. .
Raws li txoj kev hluav taws xob hluav taws xob tsim hluav taws xob, cov hluav taws xob tiv thaiv tau muab faib ua ob hom: cua sov ncaj qha thiab cua sov tsis ncaj.
Hauv qhov hluav taws xob hluav taws xob hluav taws xob ncaj qha, hluav taws xob tam sim no kis ncaj qha los ntawm cov khoom siv. Txij li thaum hluav taws xob cua sov lub zog yog concentrated ntawm cov khoom nws tus kheej, cov khoom heats sai heev. Nws yog tsim rau cov txheej txheem uas yuav tsum tau ceev cua sov, xws li cua sov ntawm forging billets. Hom hluav taws xob tiv thaiv no tuaj yeem ua kom sov cov ntaub ntawv mus rau qhov kub siab heev. Piv txwv li, cov khoom siv hluav taws xob graphitization hluav taws xob tuaj yeem ua kom sov cov ntaub ntawv rau ntau tshaj 2500 degree. Lub qhov hluav taws xob hluav taws xob ncaj qha tuaj yeem ua rau hauv lub tshuab nqus tsev cua sov los yog lub tshuab hluav taws xob tiv thaiv cua sov. Nyob rau hauv hmoov metallurgy, nws yog feem ntau siv rau sintering tungsten, tantalum, niobium thiab lwm yam khoom. Thaum siv lub cub tawg rau cua sov, koj yuav tsum xyuam xim rau: ① Txhawm rau kom sov cov khoom sib npaug, cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob ntawm txhua feem ntawm cov khoom yuav tsum ua kom zoo ib yam; ② Vim tias qhov kev tiv thaiv ntawm cov khoom nws tus kheej yog me me, txhawm rau ua tiav qhov xav tau hluav taws xob cua sov lub zog, kev ua haujlwm tam sim no loj heev, yog li Lub zog xa hluav taws xob hluav taws xob yuav tsum nyob rau hauv kev sib cuag nrog cov khoom kom tsis txhob arcing thiab hlawv cov khoom, thiab qhov kev tiv thaiv ntawm lub zog xa hluav taws xob tsheb npav yuav tsum yog me me kom txo tau qhov hluav taws xob poob; ③ Thaum muab cov kev hloov pauv tam sim no, lub network luv luv yuav tsum tau teeb tsa tsim nyog kom tsis txhob muaj qhov inductance ntau dhau thiab qhov nce ntawm lub zog. qis dhau lawm.
Feem ntau cov hluav taws kub tsis kam yog cov cua sov tsis ncaj rau cov cua sov, uas tau nruab nrog cov resistor tshwj xeeb uas siv los ua kom tau hluav taws xob hloov hluav taws xob, hu ua hluav taws xob cua sov, uas hloov hluav taws xob hluav taws xob rau cov khoom siv hauv qhov cub. Lub plhaub ntawm lub qhov cub hluav taws xob zoo li no yog ua los ntawm cov hlau phaj, thiab lub cub tawg yog lined nrog cov ntaub ntawv refractory thiab muaj cov ntaub ntawv. ** Cov khoom siv hluav taws xob siv hluav taws xob feem ntau yog hlau-chromium-aluminium hluav taws xob cua sov, nickel-chromium hluav taws xob cua sov, silicon carbide rods thiab molybdenum disilicide rods. Nyob ntawm qhov xav tau, cov cua hauv qhov cub tuaj yeem yog qhov chaw ib txwm muaj, tiv thaiv huab cua lossis lub tshuab nqus tsev. Lub zog hluav taws xob dav dav yog 220 volts lossis 380 volts, thiab qhov hloov pauv nruab nrab nrog qhov hloov pauv tau yog tias tsim nyog. Ib-theem fais fab mov rau cov cub tawg me me (<10 kW) and three-phase power supply for large furnaces. For materials with a single variety and large batches, continuous furnace heating should be used. Most resistance furnaces with furnace temperatures below 700°C are equipped with blowers to enhance heat transfer in the furnace and ensure uniform heating. The resistance furnace used to melt fusible metals (lead, lead-bismuth alloy, aluminum and magnesium and their alloys, etc.) can be made into a crucible furnace; or it can be made into a reverberatory furnace with a molten pool, and an electric heating element is installed on the top of the furnace. Resistance furnace - Resistance furnace operation process 2. Pre-work process
1. Xyuas seb lub cub tawg puas huv, ntxuav cov khib nyiab, thiab xyuas kom lub qhov cub huv si. 2. Tshawb xyuas cov phab ntsa ntawm lub cub tawg thiab lub qhov cub kom pom kev tawg thiab lwm yam kev puas tsuaj.
3. Tshawb xyuas lub installation thiab zawm ntawm cov hlau tsis kam thiab cov thermocouple lead pas nrig, thiab xyuas seb qhov ntsuas puas zoo li qub. 4. Txheeb xyuas seb qhov hluav taws xob qhov rooj qhov rooj hloov pauv puas hloov tau. 5. Tom qab xyuas kom meej tias txhua yam zoo li qub, pib tso lub workpiece. 3. Cov txheej txheem ua haujlwm
1. Xyuas kom tseeb tias lub hwj chim raug muab tua thaum tso lub workpiece.
2. Ua tib zoo saib xyuas kom tsis txhob ua rau cov cua sov ua kom sov, lub qhov cub hauv qab phaj, thiab lwm yam;
3. Nws yog txwv tsis pub muab cov khoom ntub dej ntub. Qhov kev ncua deb ntawm lub workpieces rhuab nyob rau hauv lub cub tawg thiab hluav taws xob cua sov caij yuav tsum tau khaws cia 50-70 hli; 4. Tshawb xyuas ntau yam cuab yeej thiab cov cuab yeej siv thaum ua haujlwm, thiab kho lawv raws sijhawm yog tias muaj qhov txawv txav.
5. Thaum lub qhov cub kub siab tshaj 700 degree, nws tsis pub qhib lub qhov cub kom txias los yog tshem tawm lub cub tawg kom tsis txhob ua kom lub cub tawg luv vim qhov txias txias. 4. Cov txheej txheem tom qab ua haujlwm. 1. Txiav tawm lub hwj chim
2. Tuav lub workpiece nrog kev saib xyuas thiab xyuas kom tsis txhob ua rau lub tshuab ua kom lub cev thiab cov khoom ua haujlwm puas. 3. Reinstall lub cub tawg thiab rov ua cov txheej txheem saum toj no. 4. Ntxuav cov khib nyiab sab hauv thiab xyuas kom huv si. 5. Ua tib zoo saib xyuas kev ua haujlwm txhua hnub.