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MACHINING CHARACTERISTICS OF THE REFRACTORY METAL SYSTEMS OF COLUMBIUM, MOLYBDENUM, TANTALUM, AND TUNGSTEN
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English
Abstract
The results of laboratory investigations and shop experience related to the machining of the alloy systems of columbium, molybdenum, tantalum, and tungsten are presented. Material properties and their relationships to maching characteristics are discussed, as are certain economic aspects of shop practice. Empirical data are presented to illustrate and quantify the more significant characteristics, and conclusions are drawn for appropriate shop maching conditions. In general, these metals are very difficult to machine; the most notable exceptions are the infiltrated forms of tungsten, whose extraordinary maching characteristics approach those of the light metals, and the molybdenum group, which are readily machinable by certain processes. However, grinding any of the refractory metals is slow and difficult, and very smooth finishes are exceedingly difficult to obtain.
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Citation
Stewart, I. and Arzt, P., "MACHINING CHARACTERISTICS OF THE REFRACTORY METAL SYSTEMS OF COLUMBIUM, MOLYBDENUM, TANTALUM, AND TUNGSTEN," SAE Technical Paper 630234, 1963, https://doi.org/10.4271/630234.Also In
References
- Structure and Microhardness of the Metals Niobium, Tantalum, Molybdenum, and Wolfram and of their Binary and Ternary Alloys Buckle H. 1 1946 53 56
- A Study of Ternary Diagrams of Tungsten and Tantalum Rostoker W. WADC Tech. Report 59-492 June 1959
- Binary and Ternary Phase Diagrams English J. J. DMIC Report 152 April 1961
- The Influence of Some Physical Properties on Machinability of Metals Henkin A. Dissertation University of Michigan, Mechanical Engineering Dept., 1962
- Taylor Speed and Its Relation to Reduction of Area and Brinell Hardness Janitzky E. J. Trans. ASM 26 1938 1122 32
- Machinability of Plain-Carbon, Alloy, and Austenitic Steels, and Its Relation to Yield-Stress Ratios when Tensile Strengths are Similar Janitzky E. J. Trans. ASME 66 1944 649 52
- The Machinability of Molybdenum and Its Alloys Stewart I. J. Collected Papers, American Society Tool and Manufacturing Engineers 62
- Machining of Refractory Materials Nowikowski L. J. Zlatin N. Field M. Metcut Research Associates Inc. Interim Reports IV - VII, USAF ASD Project 7-532a 1961 August 1962
- Machining Characteristics of High Strength Thermal Resistant Materials Curtiss-Wright Corp. WAS Report MP. 00-210, Item V, Part II May 1960
- Machining of Reactor Materials Schmidt A. 0. Richardson B. L. Roubik J. R. American Society Tool and Manufacturing Engineers, Paper SP6020 1959
- The Machinability of Tungsten Stewart I. J. Aerojet-General Corporation, Materials and Fabrication Reports: Part I - Sawing and Abrasive Cutoff Characteristics, Report #367, Jan. 1962 Part II - Surface Grinding Characteristics, Report #368, March 1962 Part III - Drilling, and Tapping Characteristics, Report #369 August 1962
- Some Machining Characteristics of Silver Infiltrated Tungsten Stewart I. J. (in preparation)
- Private Communication from Toensing C. Firth-Sterling Company
- Machining of Molybdenum Siekmann J. A. Sowinski L. A. Aircraft and Missiles 2 Nov. 1959 33 6
- Drilling Very High-Strength and Thermal-Resistant Materials Brezina E. Johnson R. R. G. Kennedy Marrotte N. Collected Papers Amer. Soc. of Tool and Manufacturing Engineers 60 16