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Statistical Process Control in Iron Powder Production and New Product Development
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English
Abstract
SPC is discussed with a view to indicating its implications not only to manufacturing and quality but to research and product development as well.
In the manufacturing/quality area, the efforts and methods attending full scale implementation of SPC are briefly reviewed with special reference to the differences inherent in powder making versus manufacturing of parts. SPC charting techniques suitable for powder making are described and discussed.
In the product development area, it is shown how SPC influenced a major research program. The objective of the program was to improve premixed products with a view to reducing variability in parts manufacturing.
ANOVA studies of production mixes generally showed that the main sources of premix variability were mix to mix differences and within mix differences arising from demixing subsequent to premix manufacture. It was recognized that SPC is especially applicable to dealing with the first of these and subsequent efforts to implement it to premixes are described. In the case of demixing, the development of a new premixing process is reported in which the alloy admix ingredients are bonded to the iron.
The general findings of extensive studies which show the benefits of the new process in terms of reduced variability in parts manufacturing are reviewed and the results of a study of an FC-0208 premix are presented as an example. SPC theory and concepts are used to indicate the significance of the results and their potential applicability to the production of parts.
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Citation
Semel, F., Kasputis, D., and Gummeson, P., "Statistical Process Control in Iron Powder Production and New Product Development," SAE Technical Paper 880114, 1988, https://doi.org/10.4271/880114.Also In
References
- Gummeson P. Ulf Kasputis D. J. “SPC in Steel Powder Manufacturing” International Journal of Powder Metallurgy 23 4 1987 261
- Lindsay M. W. “Statistical Process Control…A Solid improvement Strategy” International Journal of Powder Metallurgy 22 4 255
- Grant E. L. Leavenworth R. S. Statistical Quality Control Fifth McGraw-Hill, Inc. New York 1980
- Juran J. M. Gryna F. M. Bingham, R. S. Jr. Quality Control Handbook Third McGraw-Hill, Inc. New York 1979
- Truax H. M. “Cumulative Sum Charts and Their Application to the Chemical Industry” Industrial Quality Control December 1961 18
- Box G.E.P. et al “Statistics For Experimenters” John Wiley & Sons New York 1978 571
- Gummeson P. Ulf “Modern Atomizing Techniques” Powder Metallurgy 1972 15 29 67
- Wastenson G. “Methods of Extending The Applicability of Sintered Steels” Powder Metallurgy 1975 18 35 124
- Tengzelius J. Engstrom U. “Means to improve the Dimensional Tolerances of P/M Steel Components” Modern Developments in Powder Metallurgy 17 Metal Powder Industries Federation 1984 743
- Engstrom U. “Homogeneous Iron Based Powder Mixtures Free of Segregation” U.S. Patent 4,483,906 1984
- Semel F. J. “Properties of Parts Made From A Binder Treated 0.45% Phosphorus Containing Iron Powder Blend” Progress in Powder Metallurgy 1987 43 Metal Powder Industries Federation 1987 723
- Semel F. J. “Properties of Parts Made From AncorBond 1% Graphite, 1% Zinc Stearate. Ancorsteel 1000” Modern Developments in Powder Metallurgy 18-21 Metal Powder Industries Federation