Accession Number : ADA138571

Title :   The Heat Treatment Response of Thermomechanically Processed M-50 Steel.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Bres,E V

PDF Url : ADA138571

Report Date : Dec 1983

Pagination or Media Count : 70

Abstract : The heat treatment response of M-50 steel, thermomechanically processed by warm rolling, was compared to that of the same material in a conventional, spherodize-annealed condition. Warm rolling of M-50 produces markedly finer microstructures than does conventional processing, and may result in enhanced fracture resistance in such a steel. This work examined the effect of austenitizing time and temperature on warm rolled material, comparing its response to that of a conventional, spheroidized starting condition. Warm rolled sampled demonstrated significantly higher hardness and retained their finer microstructures after short austenitizing times of treatment at low austenitizing temperatures. The hardness difference is attributed to faster dissolution of finer carbides. Using warm rolled M-50, a given hardness is achieved using shorter austenitizing times or lower austenitizing temperatures than for conventional M-50. (Author)

Descriptors :   *Steel, *Bearings, *Heat treatment, *Fracture(Mechanics), *Thermomechanics, Microstructure, Structural response, Rolling(Metallurgy), Hot working, Resistance, Austenite, Temperature, Carbides, Fatigue(Mechanics), Hardness, Research management, Theses

Subject Categories : Properties of Metals and Alloys
      Fabrication Metallurgy
      Couplers, Fasteners, and Joints
      Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE