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Research and Development on New Processes of Producing Ductile Molybdenum

机译：韧性钼生产新工艺的研究与开发

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Studies were conducted on a laboratory scale with the objective of lowering the transition temperature of arccast molybdenum by improving the purity of arc-cast molybdenum and by additions of elements which would tend to mitigate the deleterious effect of interstitial impurities. Molybdenum powder was prepared by reducing high-purity MoO2Cl2 prepared under laboratory conditions, by chlorinating MoO2, then converting the dioxy-dichloride to ammonium polymolybdate. The latter was reduced to metallic powder in palladium-diffused hydrogen. The powder was consolidated by nonconsumable arc-melting, followed by rolling to sheet. Although the purity of the powder was extremely high, the ductility of the rolled sheet was not particularly good owing to contamination that occurred during melting and to the small amount of total reduction achieved by rolling. An attempt was made to purify molybdenum in the solid state in high-purity atmospheres at elevated temperatures. The purity of the solid samples was monitored by hardness and bend tests and by chemical analyses. Vacuum-arc-cast ingots were prepared using powder that had been treated in palladium-diffused hydrogen, then transferred to the melting furnance without exposure to air. Additions were made to the ingots so that various deoxidizing agents could be studied.

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