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The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Testing of Coal-Cutter Materials for Incendivity and Radiance of Sparks.

PB213947

Publication Date	1972
Personal Author	Blickensderfer, R.; Kelley, J. E.; Deardorff, D. K.; Copeland, M. I.
Page Count	22
Abstract	Three types of tests and facilities for evaluating the sparking and gas-igniting tendency of steels and alloys are described. One of the tests determines the radiance of spark showers produced by grinding a sample on an abrasive wheel in air. A second test determines the time required for a spark shower generated on an abrasive wheel to produce an ignition in an explosive gas mixture. The third test establishes the energy and speed required for impacts between various materials to ignite an explosive gas mixture. (Author)
Keywords	Cutting tools Mine gases Spark ignition Electric sparks Methane Radiant flux density Tool steels Carbide tools Safety Coal mines Tests
Source Agency	Invalid Source Agency Code
NTIS Subject Category	81A - Combustion & Ignition
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Supplemental Notes	Prepared in cooperation with Albany Metallurgy Research Center, Oregon.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197304

Testing of Coal-Cutter Materials for Incendivity and Radiance of Sparks.

Testing of Coal-Cutter Materials for Incendivity and Radiance of Sparks.
PB213947

Publication Date	1972
Personal Author	Blickensderfer, R.; Kelley, J. E.; Deardorff, D. K.; Copeland, M. I.
Page Count	22
Abstract	Three types of tests and facilities for evaluating the sparking and gas-igniting tendency of steels and alloys are described. One of the tests determines the radiance of spark showers produced by grinding a sample on an abrasive wheel in air. A second test determines the time required for a spark shower generated on an abrasive wheel to produce an ignition in an explosive gas mixture. The third test establishes the energy and speed required for impacts between various materials to ignite an explosive gas mixture. (Author)
Keywords	Cutting tools Mine gases Spark ignition Electric sparks Methane Radiant flux density Tool steels Carbide tools Safety Coal mines Tests
Source Agency	Invalid Source Agency Code
NTIS Subject Category	81A - Combustion & Ignition
Corporate Authors	BUREAU OF Mines, Washington, D.C.
Supplemental Notes	Prepared in cooperation with Albany Metallurgy Research Center, Oregon.
Document Type	Technical Report
Title Note	Rept. of investigations.
NTIS Issue Number	197304