The majority of our saws are tipped on the automatic tipper, however there are times when we are required to pretin the carbide ourselves. We start with metal plates and layout the carbide. It is necessary to keep a margin of space around the outside edges, as the silver solder on the outside carbide tips will melt, or “puddle” sooner than ones closer to the centre. Next we put a dab of black flux on the side of the carbide tip that will be brazed to the saw, then we apply a piece of silver solder. The tips are fired in a kiln until the silver solder puddles, once cooled they are tumbled in a rock tumbler to be cleaned , they are then ready to be brazed onto a saw by hand.
Tungsten, the main component in Cemented Carbide is mined from the ground. This ore is processed chemically into what is known as Ammonium Paratungstate or APT. This is the raw material traded in “metric tonne units” or MTU on the world’s commodity markets. An MTU is a unit of measure defined as one tonne of ore concentrate containing 1 per cent of the desired product. So in essence, one ton of APT contains 10g of tungsten.
Most of the mined tungsten metal powder is converted to tungsten carbide by a reaction with pure carbon powder known as carbon black. It is combined in pusher or batch furnaces at 900-2000 deg C in a process called carburization. By melting the resulting mix of Tungsten Monocarbide (WC) with tungsten metal a eutectic
composition of WC and W2C is formed. The molten mix is poured into sheet castings and then rapidly quenched. This is a highly secretive process in which carbide manufacturer’s guard their exact process. The result of this quenching forms a very, hard material having a fine crystalline structure. After cooling this material is crushed and screened into various mesh sizes, into sub micro and nano grain sizes.
The resulting powder is mixed with a binder such as cobalt or chromium and formed into various shapes before going into a sintering furnace; the result is cemented tungsten carbide which is used by in various cutting tools for a number of industries.
We’ve been providing Splitter Saw Blade Sharpening, Service and Repair for over 20 years. We are located in the Port Kells Area of Surrey, BC
This picture is of a splitter saw set up on one of our grinding machines, providing a precision grind.
“I didn’t know you guys were here.” A common statement we hear from walk-in customers. So we have been working on our website design to make our Company more visible. The fact is, Carbide Tool Works has been in business for over 50 years providing saw sharpening, service, and manufacturing of circular saw blades and cutting tools. We are conveniently located in the Port Kells Industrial area of Surrey, BC. Servicing major sawmills, from BC to Saskatchewan and USA, as well as local businesses and hobbyists alike.
In 2008 Carbide Tool Works was sold to one of the Company’s employees Hagen Tilgner. Hagen and his staff of skilled craftsmen, contribute decades of experience in saw tensioning and leveling, grinding, tool and cutter design & machining.
From Circular Saw Blades, Knives, Tongue & Groove Cutters to Router and Drill Bits and more, our staff is qualified to help with your cutting and production demands.