PROBLEM OF ALLOYING ALPHA-IRON-BASE HEAT RESISTANT STEEL (K VOPROSU O LEGIROVANII TEPLOUSTOYCHIVOY STALI NA OSNOVE ALPHA-ZELEZA),
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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A study was made of alloying alpha-Fe lattice base-steel to increase its heat resistance. The influence of the chemical composition, changes in the microstructure of the metal with changes in composition, and concentration of alloying additions were considered. Some of the methods of increasing heat resistance studied were 1 separation of excess phases from the saturated solid solution and 2 introducing elements into the Fe lattice of atoms. Some of the elements tested were W, Mo, Si, and Cr. Stabilization of the carbide phase,i.e., binding the C with the element or elements by a strong carbide forming element, made it possible to transform a predominant number of atoms of element into solid solution which reinforced steel through the solid solution and thereby enable roper use of Mo or W for the strengthening of steel.