Accession Number : AD0739906

Title :   Hardness and Microstructure of Partially Austenitized 43XX Steel.

Descriptive Note : Technical rept.,

Corporate Author : ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS

Personal Author(s) : Chiao,Weily F. ; Kula,Eric B.

Report Date : DEC 1971

Pagination or Media Count : 22

Abstract : A study was made of microstructures of several partially austenitized 43XX steels. By quenching from temperatures below those at which complete austenitization would occur, microstructures of martensite with ferrite and/or cementite were obtained. Microstructural analysis enabled the phase boundaries of the pertinent section of the phase diagram to be determined. Hardness changes in the as-quenched structures were correlated with the phase diagram. The major factor controlling the as-quenched hardness is the volume fraction and carbon content of the martensite in the structure. (Author)

Descriptors :   (*STEEL, MICROSTRUCTURE), HARDNESS, PHASE DIAGRAMS, HARDENING, QUENCHING, METALLOGRAPHY

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE