Tips For Improving the Quality of Diamond Tools

1. Adopt high hardness diamonds in the diamond tools manufacture.

Diamond’s quality, grit and concentration play decisive roles in the diamond tools’ quality. There are already many famous diamond brands in the world. In August 2007, 20/30 big grit high hardness diamonds which was produced with China’s hinged cubic press machine successfully passed technical identification. These kind of diamonds have advantages in both quality and price in the world market. So manufacturers have a more good option.

2. Plate some metal elements for the high formation of carbide on diamonds to improve the tools’ hold to the diamonds.

A good hold to diamonds will cause the diamonds not to fall off from the diamond tools early. In addition, this will also make the diamonds have the good protrusion height, and therefore the diamond tools will be sharper and more durable.

Plating the diamonds with some metal elements, for example Cr, Ni, Ti, W, etc., which will cause the formation of carbide, is a good way to improve the diamond tools’ hold to diamonds. This is mainly for three reasons. First, the plated metals can prevent the diamonds’ oxidation, graphitization and the hot corrosion of Fe element under a certain temperature, pressure and the time of sintering. Second, the plated metals can form carbide alloy on the interface between the diamonds and the tool’s bond in the sintering. This will do much help to the chemical bonding and metallurgical combining of the diamonds and the metals in tool’s bond. Third, after plated with these metals, the diamonds’ friction is improved.

3. Use ultrafine powder and pre-alloyed powder in the tools’ bond.

Ultrafine powder helps to decrease the temperature of sintering, and increase the hardness. Pre-alloyed powder can prevent metals of low melting point from losing and segregating, benefit the elastic limit and yield strength of sintered products, increase the tools’ hold to diamonds, decrease the temperature of sintering, and reduce the time of heat preservation.

4. Use good granulation technique in the production of segments.

Good granulation technologies will reduce the segregation of diamonds, distribute the diamonds more evenly, improve the cutting performance of segments, increase the mobility of the powder, benefit the cold pressing technique, and reduce the dust hazards to workers.

5. Use the vacuum protection atmosphere hot pressing technique and equipments in the sintering process.

Sintering is a key technique in the diamond saw blades’ manufacture. It will have an impact on the saw blades’ segment density, hardness, cutting performance, technical performance of the sintering equipments, production costs, and product quality.

6. Apply Hot Isostatic Press (HIP) and high temperature brazing technique in the manufacture of diamond wire saws.

Hot Isostatic Press (HIP) can decrease the porosity of the products, and improve the beads’ density, hardness, toughness and performance.

High temperature brazing will make the beads have: a reasonable diamonds distribution, chemical bonding and metallurgy combination, a strong hold to diamonds, and good diamonds’ protrusion heights. By applying this technique, the use of diamonds will save half, the cutting speed will be 2 to 4 times of the ordinary when the useful life is equal, and the production costs will be lowered.

7. Use laser welding technique.

Laser welding machines can improve the quality of welding. They are characterized by: big power, less gas consumption, low running cost, less maintenance, reliability, quality of the beam, etc. With the laser welding technique, the fixing way of the saw blade’s body and its segments is changed from the manual mode to the fully automatic mode, which is precise and reliable.