Vim li cas qhov kev kho saum npoo yog qhov tsim nyog
Graphite electrodes ntsib peb qhov kev tawm tsam ib txhij: qhov kub thiab txias ntawm qhov kawg ntawm qhov kawg, qhov chaw oxidising nyob rau hauv kab thiab txhua yam dabtsi yog khoov los ntawm mast thiab seem nqi. Cov khoom yog ntxeem tau los ntawm qhov, qhov pores yog lub hauv paus ntawm ob qho tib si oxidation thiab tawg pib, thiab tapered sib koom ua ke yog ib qho kev ntxhov siab ntawm txhua qhov kev sib txuas. Kev kho deg tsom rau peb cov ntsiab lus tsis muaj zog los ntawm kev sib khi ntawm qhov chaw, sau cov porosity thiab tswj kev sib koom ua ke geometry.
Impregnation los tsa qhov ntom ntom thiab muaj zog
Nyob rau hauv impregnation lub electrode yog muab tso rau hauv lub tshuab nqus tsev thiab ib tug resin, suab los yog hlau yog yuam mus rau hauv lub qhib pores, ces kho los yog kho cua sov. Filling pores raises bulk density and reduces open porosity, which increases compressive and flexural strength and slows oxygen penetration into the body. Impregnation yog siv rau qhov twg cov electrode yuav tsum muaj sia nyob siab txhua yam kev nyuaj siab, xws li nyob rau hauv txoj kab uas hla loj UHP kab, thiab qhov ntom ntom tau raug txheeb xyuas los ntawm qhov ntsuas qhov ntom ntom hauv ASTM C559.
Anti-Oxidation Deg Txheej
Cov tshuaj tiv thaiv - oxidation kev kho mob tsim cov txheej txheem tiv thaiv kab mob rau ntawm qhov chaw uas tiv thaiv oxidation ntawm qhov kub thiab txias yam tsis thaiv cov dej ntws tam sim no. Graphite reacts nrog huab cua los ntawm kwv yees li 450-500 C thiab sab phab ntsa ib txwm nyob rau hauv qhov ntau, yog li phab ntsa sab yog qhov feem ntau noj. Tshaj tawm cov txiaj ntsig nrog coated electrodes suav nrog 19-50 feem pua ntawm cov khoom siv hluav taws xob qis dua thiab 22-60 feem pua lub neej electrode ntev dua, nrog cov hluav taws xob qis dua ib tonne ntawm cov hlau thiab tsawg dua kem ua ib qho kev hloov.
Surface Reinforcement thiab Dimensional Control
Surface reinforcement tsim cov txheej txheem tiv thaiv muaj zog los ntawm kev siv tshuaj lom neeg lossis lub cev, txhim kho compressive thiab tensile tus cwj pwm. Qhov tseem ceeb sib npaug yog qhov kev tswj xyuas qhov ntev: txheej txheej hauv av kom ua siab ntev, xaus rau lub ntsej muag square, thiab tapered threads txiav mus rau qhov teev taper lub kaum sab xis, suab thiab ua tiav, vim cov xov raug teeb tsa qhov chaw sib txuas thiab kev sib cuag tsis zoo overheats thiab so. Flexural zog yog kuaj rau ASTM C651 hauv plaub- taw tes dabtsi yog khoov, elastic modulus rau ASTM C747 los ntawm sonic tshaj tawm thiab resistivity rau ASTM C611.
Cov nyhuv ntawm kev kho mob ntawm cov khoom tseem ceeb
| Khoom | Cov nyhuv ntawm kev kho deg | Kev txheeb xyuas txoj kev |
|---|---|---|
| Qhov ntom ntom | Nce los ntawm pore filling | ASTM C559 |
| Qhib porosity | Txo | Cov ntaub ntawv ceev thiab impregnation |
| Flexural zog | Nce | ASTM C 651 Cov Lus Qhia |
| Elastic modulus | Tswj nyob rau hauv qib band | ASTM C747 |
| Sab phab ntsa oxidation tus nqi | Txo los ntawm conductive txheej | Cov ntaub ntawv siv tau |
| Hluav taws xob resistivity | Khaws nyob rau hauv qib txwv | ASTM C 611 1 |
Yuav xaiv cov kev kho mob li cas
Kev kho mob ua raws li hom kev ua tsis tiav uas pom hauv kev pabcuam. Yog tias cov electrodes tawg ntawm qhov sib koom ua ke, cov lus teb yog cov xov zoo, qhov tseeb taper thiab ua rau - nce torque, tsis yog txheej. Yog hais tias cov kem pov tseg nyob rau sab phab ntsa ntawm cov kev hloov pauv, kev tiv thaiv - oxidation txheej yog siv tau. Yog hais tias lub cev tawg los ntawm cov neeg kho tshuab poob siab, impregnation los tsa qhov ntom ntom thiab lub zog yog txoj hauv kev. Kev siv txhua qhov kev kho mob rau txhua qhov electrode nce nqi yam tsis tau hais txog qhov tseem ceeb tsis ua haujlwm.
Cov lus nug nquag
Q:Dab tsi yog impregnation ua rau graphite electrode?
A: Nws puv qhib pores nrog resin, suab los yog hlau nyob rau hauv lub tshuab nqus tsev, raising bulk ntom thiab txo qhib porosity, uas ua rau kom compressive thiab flexural zog.
Q:Yuav ua li cas tiv thaiv - oxidation txheej txo cov electrode noj?
A: Cov ntaub ntawv tshaj tawm rau coated electrodes yog 19-50 feem pua kev siv qis dua thiab 22-60 feem pua lub neej ntev dua, nyob ntawm qhov ua kom sov thiab lub sijhawm siv hluav taws xob.
Q:Los ntawm qhov kub thiab txias ua graphite oxidise hauv huab cua?
A: Cov tshuaj tiv thaiv nrog oxygen ua qhov tseem ceeb los ntawm kwv yees li 450-500 C, uas yog vim li cas sab phab ntsa, tsis yog lub ntsiab lus arc, yog qhov chaw noj khoom noj loj.
Q:Cov kev ntsuam xyuas twg kom paub tseeb qhov chaw kho electrode?
A: ASTM C559 rau bulk ntom, ASTM C611 rau hluav taws xob resistivity, ASTM C651 rau flexural zog thiab ASTM C747 rau elastic modulus los ntawm sonic tshaj tawm.
Q:Lub txheej puas txo cov hluav taws xob conductivity?
A: Cov qauv tsim kom raug los tiv thaiv- oxidation txheej yog cov khoom siv hluav taws xob, yog li nws tiv thaiv qhov chaw ntawm qhov kub thiab txias yam tsis ntxiv qhov ntsuas tau tiv thaiv kab.