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Segment Sintered
Nov 19 , 2020

According to their manufacturing methods or bond types, diamond tools have the following ways:

-Metal-bonded diamond tools: The tool's bonding material is sintered metal containing diamond grit. The functional parts of the tool are usually diamond segments. These tools include metal-bonded diamond saw blades, diamond grinding cup wheels, diamond grinding pads, floor grinding tools, diamond core drill bits, etc. For metal-bonded diamond tools, the bond is one of the prime factors when selecting which tool to use for cutting or grinding a specific material, depending on how hard or abrasive the material is. The bond used dictates the rate at which the metallic powders wear down and expose new diamond crystals at the surface, thereby maintaining an abrasive cutting surface. Different bond strengths are achieved by the alloy mix of metallic powders chosen and how much heat and pressure are applied to the sintered segment. The reference material has historically been cobalt, thanks to high diamond retention, ease of processing by hot pressing and adjustable wear rate by admixed bronze or tungstene carbide powders. Due to its high and unstable price and to environmental concerns, alternative systems have been developed based on iron-copper alloys or mixtures, with further metallic and nonmetallic additions.

TransGrind always uses industrial premium diamond powders for best performance, high quality synthetic diamonds that have been carefully selected by our production of engineer team. The recipe of the diamonds and metal powders mixture depend on the application that the tools will be used for. TransGrind uses lots of different recipes, which are greatly guarded company secrets.

-Resin-bonded diamond tools: The tool's bonding material is mainly resin powder. An example of this kind of tool is the resin-bonded diamond polishing pads used in the concrete floor industry. Resin bond polishing pads can create good shine on the surface with a fine grit pad (such as grit 800, 1500, 3000, 5000 etc).

-Plated diamond tools: These tools are made by fixing the diamond popwders onto the tool's base surface through electroplating method or Chemical Vapor Deposition way. They can usually be made to good processing precision for some applications in construction industry.

-Ceramic-bonded diamond tools: The tool's bonding material is usually ceramic powder. This kind of tools usually have good chemical stability, small elastic deformation, high brittleness etc. Ceramic bond diamond polishing pads cut very fast and have long lifespan, lower-grit coarse grinding tools are as aggressive as metal bond diamond tools but leave less deeper scratches on the surface of floor.

-Polycrystalline Diamond (PCD): They are normally made by sintering many micro-size single diamond crystals at high temperature and high pressure. PCD has good fracture toughness and good thermal stability, and usually is used in producing geological drill bits, coating removal tools, glue removal tooling, surface preparation PCD tools, epoxy removal grinding tools, PCD removal tools etc.

-Polycrystalline Diamond Composite or Compacts (PDC): They are made by combining some layers of polycrystalline diamonds (PCD) with a layer of cemented carbide liner at high temperature and high pressure. PDC has the advantages of diamond’s high wear resistance with carbide’s good toughness.

-High-temperature brazed diamond tools: This tool is made by brazing a single layer of diamonds onto the tool via a solder at a high temperature of over 900 °C, using vacuum brazing or atmosphere-protected brazing. This brazed tools have several advantages: the solder can hold the diamonds very firmly, the single layer of diamonds' exposed height can be 70%–80% of their sizes, and the diamonds can be regularly arranged on the tool, utilization ratio over 80% diamonds brazed on the tool. The most popular vacuum brazed tools are brazed blades, drill bits etc.


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