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Machinability or cutting fluid evaluation by drilling torque test
VOL 2 (r958/59)
SYSTEMATIC ABSTRACTS
Developments in Surface Hardening. E. Mitchell. Me&Z Treatment and Drop Forging, V. 25. Oct. 1958, p. 425 + 6 pages. Surface treatment of steel parts, carried out either by altering the chemical composition of the surface, or by localized heating and cooling, giving an altered metallurgical structure. Chemical Conversion Coating8 for the Lubdcarion of Titanium. E. L. White and P. D. Miller. L~bricalio~1 Engimeeving, v. 14, no. II, Nov. 1958, p. 47g482. Titanium and its alloys have a severe tendency to seize and gall when in moving contact with themselves or other metals. Lubrication of the bare metal has been successful only to a limited extent. Galling can be greatly reduced by using chemical conversion coatings with lubricants. Both anodic coatmgs and simple dip coatings hold lubricants effectively and eliminate or reduce galling in wear applications. The results of wear testing, wire drawing, and cold forming of sheet using conversion coatings are discussed. A satisfactory coating can be formed by anodizing in a 50/;, solution of NaOH. A fluoride-phosphate conversion coating can be formed by simple immersions in a solution containing HF, KH, and NaaP04.
411
DutetC et sulfinuz. Hardness and “Sulfinuz”. Y. de Villemeur. Mktaux Corrosion-lndustvies, v. 33. July-Aug. 1958, P. 324-334. Particular advantages are given by the hardness and by amelioration to the fatigue resistance when they are subjected to “Sulfinuz”. Metal Spraying Applications. Industrial Finishing (London), Y. 10. Sept. 1958, P. 34-35, May be used to build up worn parts, such as bearings, and as a protective coating. Aluminizing Engine Valves With Induction Heating. Miles Uetling and Ottmar W. Noeske. Au&~lofive lndustvies, v. 119, no. 8, Oct. 15, 1958, p. 65 + I page. The initial high cost of mass-producing aluminized valves has brought about a method of metallizing and high-frequency induction heating which provides high quality standards and reduction in costs, while retaining the benefits of aluminum coating. Mechanized Valve Surfacing With the OxyAcetylene Flame. J, F. Barnes. Industry G Welding, V. 31, Oct. 1958, p. 81 + 2 pages. Porosity, cracking and rough surfaces were eliminated when a mechanized surfacing set-up replaced a manual one.
8. MACHININGAND TOOL WEAR Machinability or Cutting Fluid Evaluation by Drilling Torque Test. R. D. Clause and E. R. Hall, Lubrication Engineering, V. 14, Nov. 1958, p. 483-487. A laboratory power feed drill press was used to determine the machinability of two new, high-strength stainless steels. As a result of for evaluating these studies, a technique cutting fluids has been developed which yields an optimum tool life rating as well as reiative cutting efficiency. nritl press tool life data produced curves that are very similar to those determined from lathe tool life data as expressed by the Taylor equation (Vtm = C). A simplified test method for shop use is provided. Ceramics for Macbine Tools. I-II. R. M. Gill and G. Spence. Ceramics, v. 9, Aug. 1958, p. 30 + 3 pages; Sept. 1958. p. 27-31.
Traces the development of ceramic cutting tools starting with the German “Sinterknrund” of 1930. Best results in present-day tools are obtained by adding carefully controlled amounts of materials such as MgO, CaO. and SiOs in quantities up to a few per cent to an .41sOa body. Experience with alumina-based cermets has indicated that small additions of metal give no increase in strength but merely serve to induce wear resistance. Kann die Schneidketamik das Hartmetall era&en ! Can the Ceramic Tool Replace Hard Alloy? F. Kelbl. Plmseeberichfe fib Ptilvervnetallwvgie, v. 6, no. 2, Aug. 1958, p. 48-66. A review of development, manufacture, and properties of ceramic tools. Hardness, bending strength, and cutting speed relationship of various cutting tool materials.
SYSTEMATIC ABSTRACTS
Developments in Surface Hardening. E. Mitchell. Me&Z Treatment and Drop Forging, V. 25. Oct. 1958, p. 425 + 6 pages. Surface treatment of steel parts, carried out either by altering the chemical composition of the surface, or by localized heating and cooling, giving an altered metallurgical structure. Chemical Conversion Coating8 for the Lubdcarion of Titanium. E. L. White and P. D. Miller. L~bricalio~1 Engimeeving, v. 14, no. II, Nov. 1958, p. 47g482. Titanium and its alloys have a severe tendency to seize and gall when in moving contact with themselves or other metals. Lubrication of the bare metal has been successful only to a limited extent. Galling can be greatly reduced by using chemical conversion coatings with lubricants. Both anodic coatmgs and simple dip coatings hold lubricants effectively and eliminate or reduce galling in wear applications. The results of wear testing, wire drawing, and cold forming of sheet using conversion coatings are discussed. A satisfactory coating can be formed by anodizing in a 50/;, solution of NaOH. A fluoride-phosphate conversion coating can be formed by simple immersions in a solution containing HF, KH, and NaaP04.
411
DutetC et sulfinuz. Hardness and “Sulfinuz”. Y. de Villemeur. Mktaux Corrosion-lndustvies, v. 33. July-Aug. 1958, P. 324-334. Particular advantages are given by the hardness and by amelioration to the fatigue resistance when they are subjected to “Sulfinuz”. Metal Spraying Applications. Industrial Finishing (London), Y. 10. Sept. 1958, P. 34-35, May be used to build up worn parts, such as bearings, and as a protective coating. Aluminizing Engine Valves With Induction Heating. Miles Uetling and Ottmar W. Noeske. Au&~lofive lndustvies, v. 119, no. 8, Oct. 15, 1958, p. 65 + I page. The initial high cost of mass-producing aluminized valves has brought about a method of metallizing and high-frequency induction heating which provides high quality standards and reduction in costs, while retaining the benefits of aluminum coating. Mechanized Valve Surfacing With the OxyAcetylene Flame. J, F. Barnes. Industry G Welding, V. 31, Oct. 1958, p. 81 + 2 pages. Porosity, cracking and rough surfaces were eliminated when a mechanized surfacing set-up replaced a manual one.
8. MACHININGAND TOOL WEAR Machinability or Cutting Fluid Evaluation by Drilling Torque Test. R. D. Clause and E. R. Hall, Lubrication Engineering, V. 14, Nov. 1958, p. 483-487. A laboratory power feed drill press was used to determine the machinability of two new, high-strength stainless steels. As a result of for evaluating these studies, a technique cutting fluids has been developed which yields an optimum tool life rating as well as reiative cutting efficiency. nritl press tool life data produced curves that are very similar to those determined from lathe tool life data as expressed by the Taylor equation (Vtm = C). A simplified test method for shop use is provided. Ceramics for Macbine Tools. I-II. R. M. Gill and G. Spence. Ceramics, v. 9, Aug. 1958, p. 30 + 3 pages; Sept. 1958. p. 27-31.
Traces the development of ceramic cutting tools starting with the German “Sinterknrund” of 1930. Best results in present-day tools are obtained by adding carefully controlled amounts of materials such as MgO, CaO. and SiOs in quantities up to a few per cent to an .41sOa body. Experience with alumina-based cermets has indicated that small additions of metal give no increase in strength but merely serve to induce wear resistance. Kann die Schneidketamik das Hartmetall era&en ! Can the Ceramic Tool Replace Hard Alloy? F. Kelbl. Plmseeberichfe fib Ptilvervnetallwvgie, v. 6, no. 2, Aug. 1958, p. 48-66. A review of development, manufacture, and properties of ceramic tools. Hardness, bending strength, and cutting speed relationship of various cutting tool materials.