What kind of whetstone is better for sharpening a knife?

1. If the steel used for cutting tools or tools is good or hard, choose diamond grindstone, high-performance ceramic grindstone and oilstone.

2. If the materials used for cutting tools and tools are alloy materials harder than steel, choose diamond grindstone and high-performance ceramic grindstone.

When the grindstone and the cutter rub against each other, the temperature of both will rise, and the temperature at the blade and other places will rise to 60 degrees or even higher. Knife is quenched, and the heat generated when sharpening the knife can anneal the knife treated by crushing fire, improve its hardness and reduce its sharpness. Therefore, water should be added to the grindstone when sharpening the knife, and water should be used to reduce the heat generated when sharpening the knife, so as to avoid the damage of the knife due to overheating.

Extended data:

Sharpening method:

1, the cutting blade is sharp, and the grinding angles of the left and right blades are different. Seen from the left, the blade is almost perpendicular to the blade surface, and the angle is very small, so the angle on the left side should be small when sharpening the knife.

2. start sharpening the knife. The millstone should be kept moist. It is best to have long running water when sharpening a knife. The millstone should be repaired.

3. When grinding the left blade, reduce the angle, clamp the blade with both hands and fingers, and do not change the fixed angle. Move back and forth against the grindstone, pay attention to rubbing hard in the direction of your body, and don't push hard when you push forward.

4. When grinding the right edge, the angle is slightly larger than the left edge, and the angle remains unchanged. Move back and forth against the millstone. Be careful not to use force when pulling in the direction of your body, but to rub hard when pushing forward.

5. Observe whether the blade segments are sharp after grinding. You can feel this touch by gently scraping your thumb along the vertical direction of the blade. If it feels slippery, it means it is not sharp enough. You can focus on grinding this part of the blade again.