Accession Number : AD0690622

Title :   DEVELOPMENT OF ULTRA-HIGH STRENGTH, TEMPER-RESISTANT STEELS DESIGNED FOR IMPROVEMENT OF FATIGUE PROPERTIES THROUGH RELIEF OF RESIDUAL STRESS.

Descriptive Note : Technical rept. 1 May 58-28 Feb 59,

Corporate Author : ARMOUR RESEARCH FOUNDATION CHICAGO ILL

Personal Author(s) : Nudelman,Harvey B. ; Sheehan,John P.

Report Date : JUN 1959

Pagination or Media Count : 32

Abstract : Various experimental alloy steels were investigated with reference to temper resistance, which was evaluated on the basis of hardness measurements. Molybdenum was the major alloying element used for improving temper resistance in steels having carbon contents in the range of 0.30 to 0.55 per cent. Chromium, vanadium, and tungsten were utilized in minor amounts as alloying elements. It was found that austenitizing at 2200F was required to dissolve all of the carbides and provide a fully martensitic structure upon oil quenching or air cooling. Alloys were developed capable of maintaining hardnesses of Rc 40 to Rc 59 after tempering for one hour in the range of 1250F to 1300F. (Author)

Descriptors :   (*STEEL, STRESS RELIEVING), FATIGUE(MECHANICS), TEMPERING, HARDNESS, MOLYBDENUM ALLOYS, CHROMIUM ALLOYS, VANADIUM ALLOYS, TUNGSTEN ALLOYS, HOT WORKING

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE