[TheForge] Oregon fusion blades

[Peter Fels & Phoebe Palmer]

Hard to imagine how that could be done, after tempering, and still get 
significant diffusion of the carbide into the steel.

xlch58 at swbell.net wrote:
> They state that they are adding Tungsten Carbide to the blade, but the 
> process results in the TC being diffused in the blade in the cutting 
> area rather than just deposited on the surface, such that sharpening the 
> blade does not abrade it away, just reveals more.   I searched the 
> patents, but can find nothing.  They (Oregon Cutting Systems) are a 
> wholly owned subsidiary of Blount that does have a lot of patents for 
> cutting (assignee Blount)  but I can find nothing that seems to match 
> this.   It may be they are a licensee of the technology, in which case 
> it will be harder to find it, since there is nothing to hang a search on.
> 
> Charles
> 
> James Binnion wrote:
>> Except they say they are not adding a layer to the edge in the blurb.  
>> The quote is
>>
>>
>>   
>>> The manufacture of these blades includes an exclusive electrofusion  
>>> process that
>>> makes the cutting edges extra hard and tough. The process does not  
>>> add a layer to the blade, it
>>> alters the molecular structure of the steel and becomes an integral  
>>> part of the blade along its
>>> cutting edge.
>>>     
>> This almost sounds like some kind of ion implantation process but that  
>> seems like a lot of money for just a lawnmower blade. Of course the  
>> information comes from a press release that is full of weasel words so  
>> who knows for sure. They claim to have a patent pending which should  
>> be searchable on the USPTO database but you need to know something to  
>> identify the inventor or patent owner or other info that would allow  
>> you to find it.
>>
>>
>>
>> James Binnion
>> jbin at well.com
>>   
> 
> 
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