Design and processing of strong-tough microcomposite steels

Conference · Fri Dec 01 04:00:00 EST 1989

OSTI ID:7250249

Thomas, G.

Microcomposite HSLA steels based on Fe/Cr/Mn/C have been designed as a result of sophisticated electron microscopy and microanalytic studies so as to consist of fine packet lath dislocated martensite and interlath austenite films in order to obtain steels with superior combinations of strength, fracture toughness, and formability. Such properties can be obtained directly by on-line controlled rolling and cooling directly in a hot mill, so that post tempering can be eliminated. For long products and plates of low to medium carbon compositions, the processing requires accelerated water cooling. Niobium is effective in increasing hardenability, in grain refinement, and without adversely modifying the microcomposite morphology of the steels. 28 refs., 18 figs., 3 tabs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7250249
• Report Number(s): LBL-28294; CONF-9004139--1; ON: DE90007764
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
AUSTENITE
CARBON ADDITIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CRACK PROPAGATION
CRYSTAL STRUCTURE
FRACTURE PROPERTIES
HARDENING
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MARTENSITE
MECHANICAL PROPERTIES
MICROSTRUCTURE
NIOBIUM ADDITIONS
NIOBIUM ALLOYS
PROCESSING
STAINLESS STEELS
STEELS