Why add SG abrasives in grinding wheels?
SG abrasives play a key role in ceramic grinding wheels, significantly improving their performance and applicability in the following ways:
1. Improved Grinding Wheel Hardness and Wear Resistance
1. High Hardness: SG abrasives are made primarily from aluminum oxide and manufactured via a sol-gel process, resulting in a high hardness. This allows vitrified grinding wheels made with SG abrasives to maintain high wear resistance during the grinding process, extending their service life.
2. Enhanced Wear Resistance: SG abrasives offer superior wear resistance to conventional corundum abrasives, maintaining stable performance during long, intense grinding operations, reducing wheel wear and the need for replacement.
2. Improved Grinding Wheel Self-Sharpening and Cutting Efficiency
1. Excellent Self-Sharpening: SG abrasive particles continuously break during the grinding process, exposing new cutting edges. This characteristic ensures that vitrified grinding wheels maintain a consistently sharp edge, improving grinding efficiency.
2. Improved Cutting Efficiency: Due to the self-sharpening properties of SG abrasives, ceramic grinding wheels maintain stable cutting forces during the grinding process, reducing downtime caused by abrasive dulling and thus improving production efficiency.
III. Optimizing Grinding Wheel Grinding Performance and Workpiece Quality
1. Excellent Grinding Performance: Ceramic grinding wheels made with SG abrasives exhibit excellent grinding performance when rapidly cutting difficult-to-grind materials such as forged steel. This improves grinding efficiency, thereby increasing production output.
2. Guaranteed Workpiece Quality: During the grinding process, SG abrasive belts shed microcrystalline particles in layers, maintaining a sharp surface while grinding the workpiece surface. As a result, individual particles generate minimal heat, keeping the workpiece surface temperature far below the temperature that would cause burns and discoloration, effectively ensuring the quality of the polished workpiece.
IV. Reduced Production Costs and Improved Economic Efficiency
1. Reduced Downtime: Because SG abrasives maintain their sharpness for extended periods under low loads, downtime caused by abrasive dulling is reduced, improving production efficiency and reducing costs. 2. Improve economic benefits: Ceramic grinding wheels made of SG abrasives have excellent grinding performance and a long service life, which can reduce the replacement frequency and maintenance costs of grinding wheels, thereby improving the economic benefits of the enterprise.
SG abrasives is a kind of sintered abrasive made by sol-gel method with special alumina as the main raw material and a variety of modified components. And it can be applied to both consolidated and coated abrasives. SG sand has a wide range of applications, both for casting grinding under high pressure conditions, and for fine grinding of a variety of materials, including gear grinding bearing grinding, crankshaft grinding, roll grinding and others.
Physical and chemical indexes blue SG ceramic abrasives:
Physical index | ||||
colour | microlitic structure | Vickers hardness | True density | thermal resistance |
bule | crystallite dimension 50-500nm Lamellar accumulation | 1850-2100khf/mm2 | ≥3.85g/cm3 | 1300℃ |
Chemcial index | ||||
Al2O3 | La2O3 | MgO | Y2O3 | Others |
90-100% | 1-3% | 1-3% | 1-3% | 0-0.5% |