ZFA abrasive grain F12 F14 F16 for heavy-duty grinding wheels
ZFA abrasive grain F12 F14 F16 is the main raw material for heavy-duty grinding wheels. It has the following significant advantages and is particularly suitable for high-pressure and high-efficiency grinding.
1. High hardness
ZFA abrasive grain combines the high hardness of aluminum oxide (Al₂O₃) and the toughness of zirconium oxide (ZrO₂). Its hardness can reach Mohs 9 or above, and its wear resistance is better than that of ordinary corundum, and its service life is significantly extended.
2. Excellent wear resistance
The crystal size of Zirconia fused alumina is one twentieth of that of ordinary corundum, and its crystal structure is monoclinic zirconium oxide. Therefore, the speed of particle grinding and shedding is slow, and the wear resistance is particularly strong.
3. Low silicon content
Silicon dioxide has obvious thermal expansion at high temperatures, so silicon can cause cracking or cracking of the grinding wheel sintering. Using desiliconized zirconium material to make zirconium corundum is conducive to improving the yield rate of grinding wheels.
4. Excellent resistance to crushing
Toughening mechanism: The phase change toughening effect (stress-induced phase change) of zirconium oxide can absorb impact energy, reduce abrasive fragmentation, and keep the cutting edge sharp.
Heat-load adaptability: It is not easy to break during high-pressure, intermittent grinding (such as casting cleaning, roll grinding).
5. High temperature stability
Heat resistance: ZFA abrasive grain can still maintain hardness and strength at high temperatures, avoiding premature softening caused by grinding heat (compared with ordinary corundum, its softening point is higher).
The role of zirconium oxide: The high melting point of zirconium oxide (about 2700℃) further improves the thermal stability of the material.
6. Good self-sharpening
Dynamic wear characteristics: After the abrasive is worn, it can be broken in time to expose the new cutting edge, avoid clogging of the grinding wheel, and maintain stable grinding efficiency.
7. Chemical inertness
Anti-adhesion: It has a low tendency to chemically react with iron-based metals, reducing the adhesion of grinding chips (such as stainless steel grinding is not easy to produce “loading” phenomenon).
