Clean iron production and machining technology. Year 1 summary report, January 1--December 31, 1995

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The first phase of this project was conducted to develop a technique for evaluating the machinability of gray and ductile iron. That technique was then used to measure the machinability of a variety of irons and determine the processing factors that influenced and controlled machinability. The procedure developed to evaluate machinability involved drilling holes with a feed rate of 0.009 in/rev at various surface speeds. High speed steel drills were used so wear was observed more quickly. Microcarbides present in the irons were found to dominate the machinability. Pearlitic irons considered to have ``acceptable`` machinability (indicated either by tool life ... continued below

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19 p.

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Creator: Unknown. March 5, 1996.

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Description

The first phase of this project was conducted to develop a technique for evaluating the machinability of gray and ductile iron. That technique was then used to measure the machinability of a variety of irons and determine the processing factors that influenced and controlled machinability. The procedure developed to evaluate machinability involved drilling holes with a feed rate of 0.009 in/rev at various surface speeds. High speed steel drills were used so wear was observed more quickly. Microcarbides present in the irons were found to dominate the machinability. Pearlitic irons considered to have ``acceptable`` machinability (indicated either by tool life measured in the laboratory using high speed steel (HSS) drills or reports from commercial machine shops using other cutters) were found to contain from 8.9 to 10.5% by weight microscopic carbides. The tool wear rate increased when machining at higher surface speeds or machining irons containing higher weight percentage of microcarbides. All irons containing above 11.5% microcarbides consistently exhibited poor machinability. Tool wear results obtained using cubic boron nitride (CBN) cutters paralleled those obtained with HSS. Higher iron microcarbide concentrations produced faster tool wear. Experiments are now being formulated to explore methods of improving iron machinability. Future work will extend the study to ductile irons.

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19 p.

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OSTI as DE96013634

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  • Other Information: PBD: 5 Mar 1996

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  • Other: DE96013634
  • Report No.: DOE/ID/13319--T1
  • Grant Number: FC07-94ID13319
  • DOI: 10.2172/270710 | External Link
  • Office of Scientific & Technical Information Report Number: 270710
  • Archival Resource Key: ark:/67531/metadc665100

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • March 5, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Nov. 19, 2015, 1:08 p.m.

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Clean iron production and machining technology. Year 1 summary report, January 1--December 31, 1995, report, March 5, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc665100/: accessed July 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.