ISSN:
1572-8765
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Not all cutting materials can be used under hazardous atmospheres which can be found, for instance in coal mines. Certainly, this rock is brittle and amongst the diffent cutting materials, it is possible to use sintered high speed steels (HSS) for disc cutters. Their lower cost and better ductility compared to cemented carbides are advantages in considering their use for cutting applications. This article shows the characteristics of two high speed steels (T15 and M2) with 10% carbide additions (Me=Cr, Mo, Ti, W or V) sintered at 1180°C in a nitrogen base atmosphere for 30 minutes in order to evaluate this manufacturing process as an altermative to vacuum sintering, and the influence of carbide addition. In addition to mechanical properties (hardness and flexural strength) and wear behaviour, the microstructure and evaluation of incenditivity to cause explosion due to mechanical sparks were also tested under several hazardous atmospheres. A method for testing the potential of different materials to ignite hazardous gas has been developed based on rock-on-material friction behaviour in a rotating-wheel test rig.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00711204
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