Metal Blades
what physical roperty does plastic have to dull metal cutters or blades?
my teacher told us that it has something to do with the plastic getting hot. what property do plastics have to dull metal blades or cutters?
The metal (usually steel, or some other ferrous metal) is dulled by the action of adhesive wear. The carbon atoms in the plastic react with the iron in the ferrous metal, and some of the iron atoms are essentially pulled off the metal blades. This dulls the sharp edge.
The effect will be exacerbated with temperature, so if the couple gets heated, the reaction will be faster: but it doesn’t have a threshold temperature.
This adhesive wear doesn’t occur with those metals and alloys that have no affinity for carbon: cobalt alloys, for instance. So if you are designing a machine to chop nylon, and you can afford the cost of the blade, you might consider stellite, a triballoy, or other cobalt based alloy. Or just a hardface of a cobalt based alloy.
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ALM PB900 Metal Lawm Mower Blade 30cm (12″) £4.50 |
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NEW STYLISH GREY BLADE STYLE METAL ALIMINIUM BUMPER CASE – FITS iPhone 4 & 4s £6.99 |
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NEW STYLISH GREY BLADE STYLE METAL ALIMINIUM BUMPER CASE – FITS iPhone 4 & 4s £6.99 |
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FEIN Multimaster 44mm Bi-metal saw blade x 3 £31.32 |
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DeWalt DT2348QZ DT2348 Reciprocating Blades Bi Metal for Plastic, Pipes 3-12mm P £8.80 |
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Faithfull Multi Tool Blade Bi-Metal Circular 85mm £6.26 |
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Faithfull Jigsaw Blades (5) Metal T127d £4.28 |
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FEIN Multimaster 44mm Bi-metal saw blade x 1 £11.12 |
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DeWalt DT2355QZ DT2355 Reciprocating Blades Bi Metal for Metal, Rubber & Fibregl £12.01 |
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FEIN Multimaster 29mm Bi-metal saw blade x 3 £29.16 |
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DeWalt DT2209QZ DT2209 Jigsaw Blades for Wood Bi-Metal XPC T101D Pack of 5 £5.72 |
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DeWalt DT2387QZ DT2387 Reciprocating Blades Bi Metal for Plastic, Pipes 3-12mm 2 £9.89 |
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DeWalt DT2356QZ Dt2356 Reciprocating Blades Bi Metal for splinter free cuts in p £10.43 |
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PIRANHA HI-TECH METAL JIGSAW BLADES X25762 2 PACK £0.99 |
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B & D A5868 Bandsaw blade for metal £5.00 |
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Ford Racing Blade Style Metal Key Chain, Keychain, Key Ring + Free Gift from us £6.30 |
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Bosch S922EF 6″ Reciprocating Sabre Saw Blades Metal pack of 5 brand new £6.99 |
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HUMMER H2 Blade Style Metal Key Chain, Keychain, Licensed Product + Free Gift £6.30 |
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Power Saw Blades Metal Wood Saw Workshop Tools Garage Tools Garage Equipment 10 £14.47 |
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jigsaw blades metal,wood,plastic etc,bosch,dewalt,makita,ryobi,aeg,black@decker £3.00 |
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Surform blade for metal and soft plastic £3.00 |
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Triumph Spitfire Mk1 1960′s VINTAGE METAL TWO- BLADED FAN RARE £10.00 |
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BOSCH SABRE BLADE S522BF FOR METAL £5.50 |
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BOSCH SABRE BLADE S522EF FOR METAL £6.50 |
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Surform Blade for soft Metal and Plastics £2.50 |
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SAKUMA METAL ATTRACTOR BLADES AND CLEVISES £2.90 |
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RST Blade II Gloves in Gun metal/white Size Small £33.99 |
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FLYMO METAL CUTTING BLADE FLY038 – 34CM METAL CUTTING BLADE – BRAND NEW £3.99 |
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Ultra 9108-10 Bi-Metal Sabre Blades Pack of 10 Metal S1118BF £27.89 |
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Ultra 9105-10 Bi-Metal Sabre Blades Pack of 10 Wood £19.38 |
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Grey / Grey Blade Metal Non Brushed Element Aluminium Bumper Case Iphone 4 4S £12.95 |
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IPHONE 4/4S BLADE HARD ALUMINIUM METAL BUMPER CASE SILVER BLADE TD DESIGN £1.04 |
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Faithfull Sabre Saw Blades (5) Metal S918h £10.95 |
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Nissan XTerra Blade Style Metal Key Chain, New Licensed Product + Free Gift £6.30 |
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GREY / GREY BLADE ALUMINIUM METAL BUMPER CASE IPHONE 4 4S 4G NON ELEMENT VAPOR £11.00 |
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Faithfull Hacksaw Blades HSS Bi Metal (100) 12 x 24tpi £74.69 |
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SPITE bast*rd complex CD 12 track (3984142802) us metal blade 1999 £6.99 |
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BOSCH,2 607 010 542,WOOD/METAL JIGSAW BLADE, RL , £42.87 |
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Ultra 9107-10 Bi-Metal Sabre Blades Pack of 10 Metal £22.12 |
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Ultra 9106-10 Bi-Metal Sabre Blades Pack of 10 Metal S101EF £22.12 |
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Ultra 9104-10 Bi-Metal Sabre Blades Pack of 10 Metal S918H £17.71 |
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Ultra 9103-10 Bi-Metal Sabre Blades Pack of 10 Metal S918B £17.71 |
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Ultra 9110-10 Bi-Metal Sabre Blades Pack of 10 Metal £27.89 |
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Ultra 9102-10 Bi-Metal Sabre Blades Pack of 10 Metal S918E £17.71 |
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Ultra 9101-10 Bi-Metal Sabre Blade Pack of 10 Metal S918AF £18.54 |
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Ultra 9009-10 Bi-metal Sabre Blades Pack of 10 S1118BF £18.97 |
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BOSCH,2607010631,JIGSAW-BLADE SET, FOR METAL, 10PCS £26.74 |
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BOSCH,2607010630,JIGSAW-BLADE SET, WOOD + METAL £19.86 |
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DeWalt DT2308QZ DT2308 Reciprocating Blades Demolition Metal & Plastic 228mm £15.11 |
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DeWalt DT2221QZ DT2221 Jigsaw Blades for Wood Bi-Metal XPC T127DF Pack of 3 £5.72 |
Amon Amarth – “The Pursuit of Vikings” Metal Blade Records