Simple identification of carbide drills and high-speed steel drills

Due to the rapid development of CNC machine tools, the application of tungsten steel drills, that is, carbide drills, has been greatly developed. Many factories use tungsten steel drills as much as possible, but because the background colors of tungsten steel drills and white steel drills (high-speed steel drills) are bright white, it is easy to confuse and many people are difficult to distinguish.

1. The difference in weight is simple and straightforward. Because tungsten steel drills have a large specific gravity, tungsten steel drills of the same specifications are heavier than white steel drills. This is one of the easier methods.

2. In terms of color, tungsten steel drill bits are also hard alloy drill bits with a bright appearance and black hair, so they are also called tungsten steel. The appearance of white steel drill bit is bright and white.

3. Different from the coating, the coating color of the tungsten steel drill bit, that is, the carbide drill bit, is purple, and the white steel drill bit is pure black or black.

4. In terms of price, tungsten steel drills, which are hard alloy drills, are expensive. White steel drills are much cheaper, usually 1/3 of tungsten steel drills and 1/10 of Shenzhen.

5. Differences in use. Tungsten steel drills, which are hard alloy drills, have fast cutting speed and long life. White steel drills are easy to wear and have low service life.

Tungsten steel drill bit material, tungsten-containing alloy tungsten steel products contain about 10% to 18% cobalt, tungsten steel is a hard alloy, also known as tungsten-titanium alloy. The hardness is HRA90-93, second only to diamond. Because of this, products made of tungsten steel (commonly known as tungsten steel watches) have characteristics that make them less prone to wear. It is often used in the manufacture of turning tools, various drills, milling cutters, glass cutters, tile cutters, etc. It is not hard to anneal, but it is brittle. Belongs to rare metals.

Tungsten steel drills and ordinary drills or white steel drills can also be identified by sparks. Grind them on an ordinary gray grinding wheel. The tungsten steel drills have a dark red spark, which is difficult to grind. Tungsten steel drills are brittle. When they fall from the ground, a piece of the cutting edge collapses, and the white steel drill is difficult to break. Tungsten steel drills have a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance, etc., especially its high hardness and wear resistance, which remain basically unchanged even at 500 ° C , Still high hardness at 1000 ℃. Tungsten steel drills are used to drill through holes or blind holes in solid materials, and can expand the existing holes. Our common tungsten steel drills are mainly twist drills, flat drills, center drills, deep hole drills and sleeve drills. Reamers and countersinks cannot drill holes in solid materials, but they are also traditionally classified as drill bits.