Arc melting yog ib txoj kev electrothermal metallurgical uas siv hluav taws xob hluav taws xob los tsim ib qho arc ntawm electrodes los yog nruab nrab ntawm cov electrodes thiab cov khoom melted los yaj hlau. Arcs tuaj yeem tsim los ntawm kev siv tam sim no ncaj qha lossis hloov tam sim no. Thaum siv alternating tam sim no, yuav muaj ib qho instantaneous zero voltage ntawm ob electrodes. Nyob rau hauv lub tshuab nqus tsev melting, vim cov roj tsawg tsawg ntawm ob lub electrodes, nws yog ib qho yooj yim ua rau lub arc tua. Yog li, DC fais fab mov feem ntau yog siv rau lub tshuab nqus tsev arc melting.
Raws li cov txheej txheem cua sov sib txawv, arc melting tuaj yeem muab faib ua ob pawg: ncaj qha cua sov arc melting thiab indirect cua sov arc melting. Cov kev qhia tseem ceeb thiab kev lag luam ntawm arc melting muaj xws li lub sij hawm melting, qhov ntau ntawm cov khoom siv rau cov khoom siv hluav taws xob yaj hauv ib lub sij hawm (muaj peev xwm tsim tau), cov khoom siv hluav taws xob siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab lwm yam.
1, Direct cua sov arc melting
Cov hluav taws xob arc tsim los ntawm cov cua sov ncaj qha arc melting yog nruab nrab ntawm cov pas nrig electrode thiab cov khoom siv hluav taws xob melted. Cov khoom siv rau hauv qhov cub yog ncaj qha rhuab los ntawm hluav taws xob arc, uas yog lub hauv paus ntawm tshav kub rau melting. Muaj ob lub ntsiab ntawm cov cua sov ncaj qha arc melting: tsis nqus cua sov ncaj qha peb-theem arc rauv melting txoj kev thiab ncaj qha cua sov nqus arc rauv melting txoj kev.
(1) Tsis siv lub tshuab nqus tsev cua sov peb-theem arc melting txoj kev. Qhov no yog ib txoj kev uas feem ntau siv hauv steelmaking. Lub steelmaking hluav taws xob arc rauv yog hom tseem ceeb tshaj plaws uas tsis yog lub tshuab nqus tsev cua sov peb-theem hluav taws xob arc rauv. Lub tshuab hluav taws xob arc rauv feem ntau raug xa mus los ntawm tib neeg hais txog hom qhov cub. Txhawm rau kom tau txais cov hlau alloy siab, nws yog ib qho tsim nyog yuav tsum tau ntxiv cov khoom sib xyaw rau cov hlau, kho cov ntsiab lus carbon thiab lwm cov ntsiab lus ntawm cov hlau, tshem tawm cov khoom tsis zoo xws li sulfur, phosphorus, oxygen, nitrogen, thiab cov khoom tsis yog hlau hauv qab no. qhov tshwj xeeb ntawm cov khoom. Cov hauj lwm smelting no yooj yim tshaj plaws los ua kom tiav hauv hluav taws xob arc rauv. Cov cua hauv lub tshuab hluav taws xob hluav taws xob tuaj yeem tswj tau kom tsis muaj zog oxidizing lossis txawm txo los ntawm kev ua slag. Cov alloy muaj pes tsawg leeg nyob rau hauv hluav taws xob arc rauv muaj tsawg kub poob, thiab cov txheej txheem cua sov yog kuj yooj yim kho. Yog li ntawd, txawm hais tias arc melting yuav tsum muaj hluav taws xob ntau, txoj kev no tseem siv hauv kev lag luam kom yaj ntau qib high-qib alloy steels.
(2) Direct cua sov lub tshuab nqus tsev arc rauv melting txoj kev. Nws yog tsuas yog siv los yaj active thiab siab melting point hlau xws li titanium, zirconium, tungsten, molybdenum, tantalum, niobium, thiab lawv cov alloys. Nws kuj yog siv los yaj alloy steels xws li kub-resistant steel, stainless hlau, cuab yeej steel, thiab bearing steel. Cov hlau melted los ntawm cov cua kub ncaj qha rau lub tshuab nqus tsev consumable arc rauv muaj qhov txo qis hauv cov pa roj thiab cov ntsiab lus tsis huv, thiab cov ingot feem ntau tsis muaj qhov nruab nrab porosity. Lub ingot crystallization yog zoo li qub, thiab cov khoom hlau zoo tuaj. Qhov teeb meem nrog cov cua sov ncaj qha lub tshuab nqus tsev consumable arc rauv melting yog tias nws yog ib qho nyuaj rau kho cov muaj pes tsawg leeg ntawm hlau (alloys). Txawm hais tias tus nqi ntawm cov khoom siv ntawm lub cub tawg yog qis dua li ntawm lub tshuab nqus tsev induction rauv, nws yog siab tshaj qhov hluav taws xob slag rauv, thiab tus nqi smelting kuj ntau dua. Lub tshuab nqus tsev rau tus kheej siv hluav taws xob arc rauv yog thawj zaug siv rau hauv kev tsim khoom hauv xyoo 1955, pib rau melting titanium, thiab tom qab ntawd rau melting lwm yam siab melting point hlau, active hlau, thiab alloy steels.
2, Indirect cua sov arc melting
Lub arc generated los ntawm indirect cua sov arc melting yog nyob nruab nrab ntawm ob graphite electrodes, thiab lub cub tawg yog indirect rhuab los ntawm lub arc. Txoj kev smelting no yog siv los yaj tooj liab thiab tooj liab alloys. Indirect cua sov arc melting yog maj mam hloov los ntawm lwm txoj kev melting vim nws lub suab nrov thiab tsis zoo hlau tsis zoo.
Post lub sij hawm: Jan-25-2024