Powder cutting

Included in tungsten carbide powder cutting and wear-resistant materials. 

Use Intermediate (phthalic anhydride, naphthol, Tertralin, Decalin, chlorinated naphthalenes, naphthyl and naphthol derivatives, dyes), moth repellent, fungicide, smokeless powder, cutting fluid, lubricant, synthetic resins, synthetic tanning, preservative, textile chemicals, emulsion breakers, scintillation counters, antiseptic. 

Samples for testing come in many forms, including pellets, powder, cut strips, pourable liquids, or molded slugs. The material is loaded into the... 

The following alternative procedure is recommended and it possesses the advantage that the same tube may be used for many sodium fusions. Support a Pyrex test tube (150 X 12 mm.) vertically in a clamp lined with asbestos cloth or with sheet cork. Place a cube (ca. 4 mm. side = 0 04 g.) of freshly cut sodium in the tube and heat the latter imtil the sodium vapour rises 4 5 cm. in the test-tube. Drop a small amount (about 0-05 g.) of the substance, preferably portionwise, directly into the sodium vapour CAUTION there may be a slight explosion) then heat the tube to redness for about 1 minute. Allow the test tube to cool, add 3-4 ml. of methyl alcohol to decompose any unreacted sodium, then halffill the tube with distilled water and boil gently for a few minutes. Filter and use the clear, colourless filtrate for the various tests detailed below. Keep the test-tube for sodium fusions it will usually become discoloured and should be cleaned from time to time with a little scouring powder. 

If the cut is Only a minor one, allow it to bleed for a few seconds, see that no glass remains, apply a disinfectant (rectified spirit, Dettol, 1 per cent aqueous chloramine-T solution, or sulpha-pyridine powder) and bandage. 

Abrasive appHcations for industrial diamonds include thek use in rock drilling, as tools for dressing and tmeing abrasive wheels, in polishing and cutting operations (as a loose powder), and as abrasive grits in bonded wheels and coated abrasive products. 

Miscellaneous Natural Abrasives. Powdered feldspar [68476-25-5] is used as a mild abrasive in cleansing powders, and clays are sometimes used in polishing powders. StauroHte [12182-56-8] is a complex hydrated aluminosiHcate of kon, of high density (3.74—3.83 g/mL) and a hardness of 7 to 8 on Mohs scale. It is primarily used as a sandblasting grit, but siHcosis hazards had cut production in 1987 about 25% compared to that... 

For plastic-bonded materials, no clear-cut expression for the coercivity is known. It may be expected that it is rather similar, but with a smaller influence of B. For loosely packed powders, the B influence has become zero and should be multiphed by 0.48 to account for the isotropy (71). In all cases high coercivity is obtained by using small grains with limited plate-like shape, ie, the value of Nis not too high. 

---