Can brown corundum replace white corundum in abrasives and grinding tools? ——Knowledge Questions and Answers
Q1: What are brown corundum and white corundum?
Brown corundum is an abrasive made of bauxite as the main raw material and smelted at high temperature. Its main component is aluminum oxide (Al₂O₃), with a content of about 94% or more, and contains a small amount of iron oxide and silicon oxide. White corundum is a high-purity abrasive, and its main component is also aluminum oxide, but with a higher purity (about 99%) and almost no impurities.
Q2: What is the difference between brown corundum and white corundum in hardness and toughness?
Hardness: White corundum has a higher hardness than brown corundum, so it is suitable for processing high-hardness materials. Toughness: Brown corundum has a higher toughness than white corundum, and is suitable for scenes with high impact resistance requirements such as rough grinding or heavy grinding.
Q3: What are the main application areas of brown corundum?
Due to its high toughness and moderate hardness, brown corundum is mainly used in: high-intensity grinding scenes such as rough grinding and heavy grinding. Processing of materials with moderate hardness, such as steel, castings, and wood. Polishing and sandblasting, especially surface roughening.
Q4: What are the typical applications of white corundum?
Due to its high hardness and high purity, white corundum is often used for: precision grinding and polishing, such as the processing of high-hardness metals and stainless steel. Processing of electronic components and ceramics with high surface requirements. High-precision processing fields such as medical devices and optical instruments.
Q5: In what cases can brown corundum replace white corundum?
The scenarios where brown corundum can replace white corundum include: the hardness of the processed material is low, and the abrasive hardness does not need to be particularly high. The processing accuracy requirements are not high, such as surface rough grinding or deburring. When economic costs are limited, the use of brown corundum can significantly reduce expenses.
Q6: In what cases can white corundum not be replaced by brown corundum?
The situations where white corundum cannot be replaced by brown corundum include: precision processing of high-hardness materials, such as high-carbon steel and stainless steel. Processing scenarios with extremely high surface requirements, such as optical mirror polishing. Applications that are sensitive to abrasive impurities, such as medical equipment or semiconductor processing.
Q7: What is the difference in cost between brown corundum and white corundum?
The main raw materials of brown corundum and white corundum are both aluminum stone; but due to different processing methods, the production cost of brown corundum is lower, so the price is significantly lower than white corundum. For projects with limited budgets, choosing brown corundum is a more economical solution.
Q8: In summary, how to choose the right abrasive?
The choice of brown corundum or white corundum should be determined according to specific needs:
If your processing needs tend to be rough grinding or cost control, it is recommended to use brown corundum. If the processing accuracy requirements are high and the processing object is a metal with higher hardness or precision parts, white corundum should be selected. By reasonably analyzing the characteristics of the two, you can find the best balance between performance and cost. If you still have questions, you can consult experts further according to the actual application scenario.
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