We once wanted to drill some 0.82mm holes, and they could make them for us, but we had to take 100. Smallest I have now is 0.7 mm Smallest I have seen is 0.1 ...

If you add more Cobalt to large grains then you get even more toughness.  However there is a limit to how tough you can make carbide or want to make carbide.  If you get it too “tough” then it is too soft.  Remember we are using the term ‘tough’ here as the opposite of hard.

Micrograin and nanograin tungsten carbides are becoming popular and rightly so.  They do work well.  The tighter grains can mean better wear and a tougher tungsten carbide.  Typically they wear longer, retain a better edge longer and polish better.

Some of the Weldon family moved to Ireland, but this topic is not covered in this excerpt.Another 89 words (6 lines of text) about their life in Ireland is included in all our PDF Extended History products and printed products wherever possible.

Carbide vs cobaltreddit

As a practical matter, the production of extremely sharp, acutely angled cutting edges dictates that a fine grained carbide be used in blade applications (in order to prevent large nicks and rough edges). Given the use of carbide which has an average grain size of 1 micron or less, carbide blade performance therefore becomes largely influenced by the % of Cobalt and the edge geometry specified. Cutting applications that involve moderate to high shock loads are best dealt with by specifying 12-15 percent Cobalt and edge geometry having an included edge angle of about 40º. Applications that involve lighter loads and place a premium on long blade life are good candidates for carbide that contains 6-9 percent cobalt and has an included edge angle in the range of 30-35º.

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Refer to our Carbide Material Index for more information on Carbide grades, Carbide Productions, and other Articles Carbide Related Articles.

If the grains are too large and there is too much Cobalt then the carbide will move and deform under pressure.  One of the major strengths of carbide is its ability to handle pressure or compressive force.   If it is too soft it loses that ability.

Nickel alloys are very resistant to oxidation and corrosion and when heated form a thick, stable, passivating oxide layer, protecting them from further attack.

Carbide vs cobalt vstungsten

The finer the WC grain size (and therefore the more WC surface area that has to be coated with Cobalt) and the less Cobalt used, the harder and more wear-resistant the resulting part will become. To get the best performance from carbide as a blade material, it is important to avoid premature edge failures caused by chipping or breakage, while simultaneously assuring optimum wear resistance.

What you can do is mix Cobalt % with grain sizes and get carbide that is both tough and hard so you get long wear without breakage.

Feb 22, 2024 — Metric thread classes · For e position: e s = − ( 50 + 11 × P ) / 1000 \small{es = -(50 + 11 \times P) / 1000} es=−(50+11×P)/1000; · For f ...

Carbide vs cobaltfor metal

Feb 13, 2022 — Side cutters and dykes are the most common cutting pliers. They are useful for cutting electrical wires and cables. They have many other uses.

TungstenCarbideDrill Bits

Bigger grains made carbide tougher and smaller grains made it harder. By varying grain size and cobalt % you can make carbide a lot tougher or a lot harder.

Weldon is one of the many names that the Normans brought with them when they conquered England in 1066. The Weldon family lived in Northamptonshire, at Weldon.

Cobalt vs carbidedrill bits for steel

This is a graph of 23 different grades of modern carbide. In the left graph you can see by the Co% line on the bottom that as co% goes up hardness drops and toughness stays sort of the same.  This is because grain size differs. In the middle graph we increase grain size and hardness drops while toughness sort of drops.

Outstanding amongst the family at this time was Gilbert Welton (or Gilbert de Wilton), Bishop of Carlisle (1352-1362); Sir Anthony Weldon (1583-1648), an English 17th Century courtier and politician, purported author of "The Court and Character of...Sir Anthony Weldon (d. 1649?), was an "English historical writer, of Swanscombe, Kent, descended from a younger branch of the family of Weltden of Northumberland. His father, Sir Ralph Weldon, knighte...John Weldon (1676-1736), was an English musician, born at Chichester on 19 Jan. 1676. He was educated at Eton College and Ralph Weldon (1674-1713), was a Benedictine monk, of the ancient family of Wel...

1/4" Shank, Carbide Tipped, V Groove Bit, 3/8, 105R4-10, 3/8" Dia, Carbide Tipped, V-Groove Bit, 90°, 2 Flute, 1/4" Shank, 1 3/4" Length ...

In the United States, the name Weldon is the 2,248th most popular surname with an estimated 14,922 people with that name. 3

Grades C-5 to C-8 commonly have added tungsten carbides such as Tantalum tungsten carbide and Titanium tungsten carbide.  This is partly because of the problems cutting iron based materials such as steel and may not have any advantages in cutting other materials.  Adding titanium tungsten carbide gives better hardness at high temperature as well as greater wear resistance and resistance to cratering.  Adding 'tantalum tungsten carbide increases hardness while it lowers strength and wear resistance.

CarbideDrill bits

Specifying a large WC particle size and a high percentage of Cobalt will yield a highly shock resistant (and high impact strength) part.

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Grain size: Smaller grains give better wear and larger grains give better impact resistance.   Very fine grain tungsten carbides give very high hardness while extra coarse grains are best in extremely severe wear and impact applications such as rock drilling and mining applications.

Carbide vs cobaltdrill bit

HIP is hot isostatic pressure.  Ordinarily tungsten carbide is rammed in a mold with the pressure all coming from the direction of the ram.  HIP is a means of applying pressure evenly from all sides of the tungsten carbide.

Welton is also a village and civil parish in the East Riding of Yorkshire which literally means "farmstead by a spring or stream." 2

In the very early days of carbide you made carbide tougher or harder by changing the amount of Cobalt in the binder.  Cobalt is metal and softer than carbide grains so more cobalt made it tougher and less made it harder. Then people learned how to change the grain size.

Tungsten carbide as used here means WC grains in a cobalt binder.  Cobalt is softer than the tungsten carbide grains so the more cobalt you have the softer the overall materials will be.  This may or may not relate to how hard the individual grains are.

Tungstencarbide vstitaniumvs cobaltdrill bits

This web page shows only a small excerpt of our Weldon research. Another 30 words (2 lines of text) covering the years 1352, 1362, 1583, 1603, 1648, 1649, 1650, 1674, 1676, 1713, 1723 and 1736 are included under the topic Early Weldon History in all our PDF Extended History products and printed products wherever possible.

By the addition of titanium carbide and tantalum carbide, the high temperature wear resistance, the hot hardness and the oxidation stability of hardmetals have been considerably improved, and the WC-TiC-(Ta,Nb)C-Co hardmetals are excellent cutting tools for the machining of steel. Compared to high speed steel, the cutting speed increased from 25 to 50 m/min to 250 m/min for turning and milling of steel, which revolutionized productivity in many industries.

Because of the political and religious discontent in England, families began to migrate abroad in enormous numbers. Faced with persecution and starvation at home, the open frontiers and generally less oppressive social environment of the New World seemed tantalizing indeed to many English people. The trip was difficult, and not all made it unscathed, but many of those who did get to Canada and the United States made important contributions to the young nations in which they settled. Some of the first North American settlers with Weldon name or one of its variants: Weldon Settlers in United States in the 17th CenturyWilliam Weldon who arrived in Virginia in 1619 aboard the ship "Bona Nova" 4William Weldon who settled in Virginia in 1624Elizabeth Weldon who settled in Salem, Massachusetts in 1630 as part of the Winthrop FleetRobert Weldon, who settled in Massachusetts in 1630 as part of the Winthrop FleetHenry Weldon, who arrived in Maryland in 1667 4... (More are available in all our PDF Extended History products and printed products wherever possible.)Weldon Settlers in United States in the 19th CenturyWilliam Weldon, who landed in New York in 1830 4James Weldon, aged 22, who arrived in New York in 1854 4Owen Weldon, who landed in Washington County, Pennsylvania in 1884 4

Electrical Conductivity - Tungsten carbide is in the same range as tool steel and carbon steel while Cermet II grades conduct more like glass.

A good tungsten carbide manufacturer can change the characteristics of their tungsten carbide in a great number of ways.

The surname Weldon was first found in Northamptonshire where they held a family seat as Lords of the manor of Weldon, and are conjecturally descended from Robert de Bucy, a Norman Baron who acquired Weldon, an ancient Roman villa, from Olaf, from King William for his assistance at the Battle of Hastings in 1066."The Tower, the manorial seat of the ancient family of Welton [in Northumberland], is fast going to decay; there are still remaining in tolerable preservation, two handsome rooms with Oriel windows. The Hall, an ancient mansion which, according to an inscription on the walls, was repaired in 1614, is still occupied." 1 Welton is also a village and civil parish in the East Riding of Yorkshire which literally means "farmstead by a spring or stream." 2

Anglo-Norman names tend to be marked by an enormous number of spelling variations. This is largely due to the fact that Old and Middle English lacked any spelling rules when Norman French was introduced in the 11th century. The languages of the English courts at that time were French and Latin. These various languages mixed quite freely in the evolving social milieu. The final element of this mix is that medieval scribes spelled words according to their sounds rather than any definite rules, so a name was often spelled in as many different ways as the number of documents it appeared in. The name was spelled Weldon, Veldon, Velton and others.

We are talking about cemented tungsten carbide.  This is tungsten carbide grains cemented together by cobalt.  Cobalt is the binder.  As you get more cobalt you get a softer grade that is more impact resistant.  If you have less cobalt you get better wear but the part will break more easily when hit.  Generally as you go from a minimum of 2% cobalt to a maximum of 20% cobalt you get a part that is harder to break but also a part that will wear out faster.

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"The Tower, the manorial seat of the ancient family of Welton [in Northumberland], is fast going to decay; there are still remaining in tolerable preservation, two handsome rooms with Oriel windows. The Hall, an ancient mansion which, according to an inscription on the walls, was repaired in 1614, is still occupied." 1 Welton is also a village and civil parish in the East Riding of Yorkshire which literally means "farmstead by a spring or stream." 2

NS Kumar · 2012 · 142 — It is observed that the surface roughness increases with increased feed rate and is higher at lower speeds and vice versa for all feed rates. Previous article ...

Jul 16, 2016 — I use a DCGT tip for finishing DCMT for roughing out. I think the "GT" tip is for aluminium but gives a good (better) finish on mild steel. I ...