LXII.X-ray study of some tungsten magnet steel residues

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Abstract
Summary 1. 1. The carbide constituents of tungsten magnetic steels are identified from the X-ray spectra of the residues. They are tungsten carbide, the mixed carbide Fe4W2C, and a third compound probably due to the silicon content. No cementite is found. 2. 2. The tungsten carbide spacings are found to be slightly smaller than the normal values. In this, as well as in the mixed carbide, it is suggested that atomic replacement occurs. 3. 3. Chemical analysis of the residues as an indication of steel constituents is found to be of doubtful value. X-ray analysis is shown to be reliable when controlled by photographs of the untreated steel.

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