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#1
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Titatinum tools
Is there someone out there who can clarify a mystery for me. I have just
bought all sorts of titanium drill bits and have other tools that they say contain titanium. I don't get it, working on a titanium aircraft part with a normal chrome molly tool will destroy that titanium part. So how can they alloy or coat a drill bit that won't react to itself or to the part you are working on at the molecular level? The only explanation I can think of right now is that the titanium they mention is bull and is just a fancy colored coating. The tools work well enough but I am a very curious individual. Claude Montreal |
#2
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Titatinum tools
In article , "claude" wrote:
Is there someone out there who can clarify a mystery for me. I have just bought all sorts of titanium drill bits and have other tools that they say contain titanium. I don't get it, working on a titanium aircraft part with a normal chrome molly tool will destroy that titanium part. So how can they alloy or coat a drill bit that won't react to itself or to the part you are working on at the molecular level? The only explanation I can think of right now is that the titanium they mention is bull and is just a fancy colored coating. Titanium by itself isn't especially hard. But it can bring many desirable properties to other metals when combined into an alloy (or used as part of a coating). General reading on titanium: http://en.wikipedia.org/wiki/Titanium -- |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~| | Malcolm Hoar "The more I practice, the luckier I get". | | Gary Player. | | http://www.malch.com/ Shpx gur PQN. | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~ |
#3
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Titatinum tools
my experience those titanium drill bits are a waste of money, the gold
color looks nice but they actually dull faster. its a marketing ploy, and a good friend with a machine shop reached the exact same conclusion indenpendent of mine. |
#4
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Titatinum tools
On Nov 24, 4:04 pm, "claude" wrote:
Is there someone out there who can clarify a mystery for me. I have just bought all sorts of titanium drill bits and have other tools that they say contain titanium. I don't get it, working on a titanium aircraft part with a normal chrome molly tool will destroy that titanium part. So how can they alloy or coat a drill bit that won't react to itself or to the part you are working on at the molecular level? The only explanation I can think of right now is that the titanium they mention is bull and is just a fancy colored coating. The tools work well enough but I am a very curious individual. It is not a titanium coating. It is a titanium _oxide_ coating. Oxides are frequently far harder than the principal element. Aluminum oxide, one of the softer metals, is used as an abrasive and is very hard. R |
#6
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Titatinum tools -- correct answer
Bits are coated after sharpening with a thin layer of titanium nitride which
is a hard material. see http://en.wikipedia.org/wiki/Titanium_nitride for more detail. "claude" wrote in message ... Is there someone out there who can clarify a mystery for me. I have just bought all sorts of titanium drill bits and have other tools that they say contain titanium. I don't get it, working on a titanium aircraft part with a normal chrome molly tool will destroy that titanium part. So how can they alloy or coat a drill bit that won't react to itself or to the part you are working on at the molecular level? The only explanation I can think of right now is that the titanium they mention is bull and is just a fancy colored coating. The tools work well enough but I am a very curious individual. Claude Montreal |
#7
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Titatinum tools -- correct answer
On Nov 24, 11:11 pm, "Jeff" wrote:
Bits are coated after sharpening with a thin layer of titanium nitride which is a hard material. seehttp://en.wikipedia.org/wiki/Titanium_nitride for more detail. Hmmm. Thanks for posting that link. I'd posted earlier about titanium oxide coating, which is commonly used on knives - not sure why I confused the two in my mind. Titanium oxide is hard, titanium nitride is much harder. Thanks for setting the record straight, Jeff. R |
#8
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Titatinum tools
"RicodJour" wrote in
ups.com: On Nov 24, 4:04 pm, "claude" wrote: Is there someone out there who can clarify a mystery for me. I have just bought all sorts of titanium drill bits and have other tools that they say contain titanium. I don't get it, working on a titanium aircraft part with a normal chrome molly tool will destroy that titanium part. So how can they alloy or coat a drill bit that won't react to itself or to the part you are working on at the molecular level? The only explanation I can think of right now is that the titanium they mention is bull and is just a fancy colored coating. The tools work well enough but I am a very curious individual. It is not a titanium coating. It is a titanium _oxide_ coating. WRONG;it's titanium NITRIDE. Almost as hard as diamond,excellent wear resistance. titanium oxide is a pigment used in white paint. Oxides are frequently far harder than the principal element. Aluminum oxide, one of the softer metals, is used as an abrasive and is very hard. R Strange,because aluminum oxide forms on any piece of bare aluminum exposed to oxygen or ordinary air. And carbon steel drill bits drill it easily. Of course,it IS harder than WOOD,so it's used for cheaper sandpaper. It's not very hard compared to other abrasives. -- Jim Yanik jyanik at kua.net |
#9
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Titatinum tools -- correct answer
"RicodJour" wrote in
ups.com: On Nov 24, 11:11 pm, "Jeff" wrote: Bits are coated after sharpening with a thin layer of titanium nitride which is a hard material. seehttp://en.wikipedia.org/wiki/Titanium_nitride for more detail. Hmmm. Thanks for posting that link. I'd posted earlier about titanium oxide coating, which is commonly used on knives - not sure why I confused the two in my mind. Titanium oxide is hard, titanium nitride is much harder. Thanks for setting the record straight, Jeff. R I've never heard of titanium oxide being used on knives for a coating. Unless it's white paint. ;-) I have heard of TiN being used on knives,for the same reason it's used on drills.It also dresses them up nice.You can even buy fancy dinner cutlery with TiN coating;it looks like gold plate,but does not wear like gold plate. It's deposited by vapor deposition;a plate of Ti is inside a vacuum chamber pressurized with nitrogen (at ~400degF,IIRC),and an electric arc is discharged to the sacrificial Ti plate,vaporizing it and combining it with the Nitrogen to form TiN,which falls onto the metallic items placed in the chamber,plating them. Plating thickness is determined by arc current and time. -- Jim Yanik jyanik at kua.net |
#10
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Titanium coated tools
On Nov 25, 12:02 am, Jim Yanik wrote:
"RicodJour" wrote roups.com: On Nov 24, 4:04 pm, "claude" wrote: Is there someone out there who can clarify a mystery for me. I have just bought all sorts of titanium drill bits and have other tools that they say contain titanium. I don't get it, working on a titanium aircraft part with a normal chrome molly tool will destroy that titanium part. So how can they alloy or coat a drill bit that won't react to itself or to the part you are working on at the molecular level? The only explanation I can think of right now is that the titanium they mention is bull and is just a fancy colored coating. The tools work well enough but I am a very curious individual. It is not a titanium coating. It is a titanium _oxide_ coating. WRONG;it's titanium NITRIDE. Almost as hard as diamond,excellent wear resistance. titanium oxide is a pigment used in white paint. Jeff already pointed that out, and I already thanked him for pointing it out. Oxides are frequently far harder than the principal element. Aluminum oxide, one of the softer metals, is used as an abrasive and is very hard. R Strange,because aluminum oxide forms on any piece of bare aluminum exposed to oxygen or ordinary air. And carbon steel drill bits drill it easily. Of course,it IS harder than WOOD,so it's used for cheaper sandpaper. It's not very hard compared to other abrasives. The oxidation of aluminum is not the same as aluminum oxide. If I dusted diamond powder on your cereal, you'd never know it. If there were a small diamond in your cereal, you'd break a tooth. Rubies and sapphires are aluminum oxide. Them's plenty hard, chief! http://www.galleries.com/minerals/ox...m/corundum.htm Aluminum oxide sandpaper is not cheap, it's appropriate. The "cheaper" grades are flint and garnet papers, and they're appropriate for other uses. That's a whole 'nother thread, so let's not get into that in this one. R |
#11
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Titanium coated tools
On Nov 25, 12:10 am, Jim Yanik wrote:
"RicodJour" wrote On Nov 24, 11:11 pm, "Jeff" wrote: Bits are coated after sharpening with a thin layer of titanium nitride which is a hard material. seehttp://en.wikipedia.org/wiki/Titanium_nitridefor more detail. Hmmm. Thanks for posting that link. I'd posted earlier about titanium oxide coating, which is commonly used on knives - not sure why I confused the two in my mind. Titanium oxide is hard, titanium nitride is much harder. Thanks for setting the record straight, Jeff. See? That's where I thanked Jeff. He just beat you to it! I've never heard of titanium oxide being used on knives for a coating. Unless it's white paint. ;-) You've seen it, I'm sure. The coating gives a rainbow color and can come from heat treating titanium or using a titanium oxide coating on steel (for knives and such). http://www.sjdiscounttools.com/ker1600vib.html I know the white paint pigment as titanium dioxide, which also seems to be known as titanium oxide...just to confuse people. There're titanium oxides, dioxides and trioxides. I'm about oxided out of here! I have heard of TiN being used on knives,for the same reason it's used on drills.It also dresses them up nice.You can even buy fancy dinner cutlery with TiN coating;it looks like gold plate,but does not wear like gold plate. It's deposited by vapor deposition;a plate of Ti is inside a vacuum chamber pressurized with nitrogen (at ~400degF,IIRC),and an electric arc is discharged to the sacrificial Ti plate,vaporizing it and combining it with the Nitrogen to form TiN,which falls onto the metallic items placed in the chamber,plating them. Plating thickness is determined by arc current and time. The titanium oxide coating is also vapor deposited. Seems like we're all learning something in this thread. One of the reasons I love newsgroups. R |
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