Tungsten carbide tools

Miller CW, Davis MW, Goldman A, Wyatt JP Pneumoconiosis in the tungsten-carbide tool industry. AMA Arch Ind Hyg Occup Med 8 453, 1953... 

Round headed wood screw in end of rifled alug Hardened steel or tungsten carbide tool bit in wad. Rifle bullet encased in three piece sabot. ImproviBcd slug made from regular shotshell. Grapeshot load - lead balls and wire. 

Commercially, cobalt is used primarily in high-temperature alloys, in tungsten carbide tools, and (with iron and nickel) in permanent magnets. Cobalt salts are used in pigments, in paint dryers, and as catalysts in the petroleum industry. 

FIGURE 9.37. Solid tungsten carbide tools for the machining of printed circuit boards. Drill rotation speed. 

Figure 4. Stone specimen mounted in shaping machine for surface sampling. Tungsten carbide tool bit reciprocating horizontally precisely removes layers of stone, producing powders for chemical analysis.

Figure 6.11 Microhole surface roughness as a function of the tool-electrode feed rate, according to Han et al. [50]. Drilling was done with a 0.2 mm cylindrical tungsten carbide tool-cathode in 30 wt% NaOH electrolyte at 35 V. Reprinted from [50] with permission from Elsevier.

Machinability of Carbon-Fiber-Reinforced and GLARE Materials, Fig. 4 Cutting edge rounding of a tungsten carbide tool after turning of CFRP... 

Table 7.2 Typical cutting speeds with HSS and tungsten-carbide tools...

What spindle speed would he required to turn a 150 mm diameter cast iron component using cemented-tungsten-carbide tooling at a cutting speed of 160 m/min ... 

IOl At what speed would you turn a 150 mm diameter bronze component using a tungsten carbide tool at a cutting speed of 10OmAnin (ans. 382rev /min). 

Jan] Jansson, B.J., Thermodynamic Calculations for Tungsten Carbide Tools wifli an Iron-Based Binder , High Temp.-High Pres., 22(4), 465-478 (1990) (Assessment, Calculation, Phase Diagram, 9)... 

For turning CoCr alloys, tungsten carbide tools are usually applied. Ceramic coated carbide, boron nitride and high speed steels can also be used. Water soluble oils are applied as cutting fluids. Table lb.5 gives the turning parameters for CoCr-alloys. 

Cup Wheel. An abrasive wheel shaped like a cup such wheels are used, for example, in the grinding of flat surfaces. Diamond cup-wheels are employed in the grinding of tungsten carbide tools. Cupel. A small, refractory, tapered cylinder (broad end up) with a shallow depression in the top cupels are made from bone ash or calcined magnesia and are used for the assay of non-ferrous ores. 

Wimet. Trade-name. Cemented tungsten carbide tool metal. Wickman Wimet Ltd, Coventry. 

It is possible to affect electrochemical grinding and polishing by using a cathodic wheel with an anodic workpiece separated by a flowing electrolyte. Tungsten carbide tools are usually prepared by such a process. An electrochemical saw has also been produced. 

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