Malleable Chromium and Its Alloys
Technical rept. 15 Sep 1950-15 Sep 1951
BUREAU OF MINES ALBANY OR
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Improvements in production of high purity chromium metal by magnesium reduction of anhydrous chlorides and by hydrogen treatment of electrolytic chromium is reported. The arc melting of hydrogen treated chromium has been accomplished and the forging, rolling, and swaging of this arc melted material has been successful. Arc melted chromium has been forged at liquid air temperatures. X-ray and metallographic studies indicated the recrystallization temperature of rolled chromium sheet tobe about 750 degrees C. Experiments in drip melting, deoxidizing element additions, and treatment with molten calcium and calcium hydride are recorded. Brinell hot hardness values on arc melted chromium have been obtained at various temperatures up to 800 degrees C. Preliminary investigation of hot bending characteristics of rolled chromium sheet shows the minimum bending temperature to be 325 degrees C. The heat resistance of chromium has been investigated.
- Inorganic Chemistry
- Metallurgy and Metallography
- Fabrication Metallurgy