Le caratteristiche e gli utilizzi degli abrasivi al corindone in Cina sono riportati nella Tabella 1-1-3.
| Varietà di corindone | caratteristiche | utilizzo |
| Corindone marrone | Aspetto del corindone marrone per il colore marrone, la composizione chimica principale è Al₂O₃, il suo contenuto è del 94,5% ~ 97%, con elevata durezza, tenacità, particelle affilate, caratteristiche di prezzo relativamente basso, adatto per la macinazione di metalli ad alta resistenza alla trazione, in assenza di altri abrasivi, generalmente può essere sostituito da esso. | Ampiamente utilizzato nella sgrossatura di acciaio comune, come: acciaio al carbonio, acciaio legato generico, ghisa malleabile, bronzo duro, ecc. Gli abrasivi secondari di corindone marrone sono spesso utilizzati come mole per macinazione del riso, mole per taglio della resina, piastrelle leviganti, tele smeriglio, carta vetrata, ecc. |
| Corindone bianco | La durezza del corindone bianco è leggermente superiore a quella del corindone marrone, ma la tenacità è leggermente peggiore ed è facile tagliare il pezzo durante il taglio, l’autoaffilatura è migliore, la generazione di calore è ridotta, la capacità di rettifica è forte, l’efficienza è elevata e il prezzo è più alto di quello del corindone marrone | È adatto per la rettifica di acciaio con elevata durezza, come acciaio rapido, acciaio al carbonio commerciale, acciaio temprato, acciaio legato, ecc. |
| Corindone monocristallino | Le particelle di abrasivo di corindone monocristallino sono composte da un singolo cristallo e hanno un buon tagliente multiprismatico, elevata durezza e tenacità, forte capacità di rettifica, minor calore di rettifica, lo svantaggio è che i costi di produzione sono più elevati, si generano gas di scarico e acque reflue durante la produzione e la resa è bassa. | Può essere utilizzato per rettificare materiali metallici duri e difficili da maneggiare, come acciaio inossidabile, acciaio rapido ad alto tenore di vanadio, acciaio legato resistente al calore e pezzi lavorati facili da deformare e bruciare, considerando che gli abrasivi al corindone monocristallino sono limitati dalle condizioni di produzione, generalmente consigliati solo per la rettifica di leghe resistenti al calore e materiali metallici difficili da usura. |
| Corindone microcristallino | Appartiene alla varietà derivata del corindone marrone, l’aspetto, il colore e la composizione chimica sono simili al corindone marrone, caratterizzato da piccole dimensioni dei cristalli (50 ~ 280/μm), buona tenacità del grano abrasivo, elevata resistenza e buona autoaffilatura | È adatto per la rettifica di acciaio inossidabile, acciaio al carbonio, ghisa con rettifica a sfere, ecc., e il metodo di rettifica è adatto per la fresatura di formatura, la rettifica di taglio, la rettifica fine e la rettifica pesante. |
| Corindone cromato | È una varietà derivata di corindone bianco, con un aspetto rosato, durezza simile al corindone bianco, tenacità leggermente superiore al corindone bianco e alta resistenza, buone prestazioni di rettifica e alta precisione di rettifica. Gli abrasivi realizzati con questo abrasivo hanno una buona ritenzione della forma | Il campo di applicazione è simile al corindone bianco, particolarmente adatto per la rettifica fine e la rettifica di formatura di vari utensili, strumenti di misura e parti di strumenti. In generale, il corindone cromato ha migliori proprietà di rettifica rispetto al corindone bianco |
| Corindone di zirconio | Il corindone di zirconio è: α-Al₂O₃ e Al₂O₃-ZrO2: composti cocristallini, caratterizzati da una durezza leggermente inferiore, ma da un elevato valore di tenacità, elevata resistenza, solitamente dimensioni dei cristalli più sottili, buona resistenza all’usura | Gli abrasivi di corindone di zirconio stranieri sono utilizzati principalmente per la rettifica pesante, adatti per la rettifica di acciaio legato resistente al calore, acciaio legato Qin e acciaio inossidabile austenitico |
| Corindone sinterizzato | È sinterizzato con materiale fine di bauxite o polvere di ossido di alluminio, che è caratterizzato da una buona tenacità, può essere trasformato in varie forme e dimensioni speciali di grani abrasivi |
Viene utilizzato principalmente per mole di rettifica per lingotti ad alta resistenza, adatte per la rettifica di lingotti di acciaio inossidabile, ecc. |
| Giada nera in acciaio | Appartiene a una varietà derivata del corindone marrone e ha un aspetto nero. È caratterizzato da un basso contenuto di Al₂O₃ e dalla presenza di una certa quantità di Fe₂O₃ (circa il 10%), quindi la durezza è bassa ma la tenacità è buona | Viene utilizzato principalmente per la molatura libera, come la molatura o la molatura grossolana prima della galvanizzazione dei prodotti, ed è anche utilizzato per realizzare abrasivi rivestiti. Fogli di taglio in resina, blocchi di lucidatura, ecc. |
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