# B O S C H C A R B I D E
WHAT IS CARBIDE?
Bosch is a leader in Carbide Technology - find out more in this page about:
- What is Carbide?
- What is the particular Bosch Carbide expertise?
Bosch uses carbide components in accessories for many years and even produces its own carbide technology since the 80's.
Carbide is one of the hardest and most wear resistant metal. It withstands physical stress, impact, deformation, high temperatures, corrosion and high pressure and is used for working with the toughest materials,
Carbide can be made in various shapes according to the accessory to which it will be bonded after the manufacturing process.
Carbide consists mainly of:
and small portions of different carbide: Titanium carbide (TiC), Tantalum carbide (TaC), or Nobium Carbide (NbC).
Yes according to :
carbide grades differ from a "Nano" microstructure to an "Extra Coarse" microstructure.
+ What is the Bosch advantage? The invidual grades offer a variation of advantages based on material properties and application requirement.
Bosch is able to produce various carbide grades according to the accessories and the application materials' composition.
First, Tungsten Carbide is produced (1), then Cobalt and other metal (Tic, Tac, NbC) are added and mixed (2). The mixture is milled and dried to produce a material powder (3).
This powder or granulation is put into a mould and pressed (4), then compacted to get the first pre-profiled carbide parts (5).
The pre-profiled carbide parts are placed and baked in a sintering furnace (6) heated at a temperature up to 1600°C and a pressure up to 2000 bars.
The parts are then shaped to accurate geometric shapes in a grinding machine (7). After a final quality control (8) they are ready to be joined to accessories by brazing or welding according to the Bosch carbide technology required (9).
Summary of the key processes
The right carbide technology is required to join the different carbide parts to accessories. The joining method can either be welding or brazing.
What are the carbide technologies used to join carbide parts to accessories?
Hardness is the relative ability of one material to wear, abrade, deform or indent another material.
Toughness is the ability of a material to absorb energy and deform without fracturing. This may be easily understood by thinking of a marshmallow being slightly pressed between 2 fingers. It is compressed and extends within its elastic limits. Even metals as Tungsten Carbide extend to a certain degree. The ratio varies with the amount of Cobalt.
The hardness level rises by decreasing the Cobalt content and the particle size of the Tungsten carbide (1).
The toughness level rises by increasing the Cobalt content and the particle size of the Tungsten carbide (2).
+ How to get both - hardness and toughness? In a system, where two parameters (hardness, toughness) have to be maximized, it is important to find the right balance between each of them.
For decades carbide technology has been a focus at Bosch resulting in various product advantages. Select each argument below to find out more.+ Bosch is the only AC manufacturer producing in-house carbide powders, and powder blends (Cobalt, Tungsten, Titanium, others). Unlike other companies who buy a predefined carbide mixture, Bosch begins the carbide manufacturing process with the raw materials that are mixed and milled in the Bosch competence centers.