United States Department of Transportation
i
Prospects for making carbide-free bainitic thick steel plate by means of controlled quenching : a first estimate
-
1995-11-12
-
[PDF-496.90 KB]
Details:
-
Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Resource Type:
-
Corporate Publisher:
-
Abstract:Materials used for the shells of pressurized railroad tank cars
must be strong and inexpensive, yet also easily weldable and
resistant to fracture. The high costs associated with special alloy
compositions have made it difficult in the past to find improved
materials that attain all of these goals. Recent advances in steel
making research indicate that commercial grade low alloy steels
have the potential to offer improved properties at moderate cost in
thicknesses suitable for tank car construction, if modern
thermomechanically controlled processing methods are applied.
Results are presented from a heat transfer analysis of controlled
quench schedules for 12.7 and 25.4 mm thick plate. The
calculated cooling curves are compared with an isothermal
transformation diagram for a medium carbon low alloy steel. The
results suggest the possibility that interrupted water spray
quenching might produce carbide-free bainite, a microstructure
now associated with the combination of high strength, high
fracture toughness, and good weldability.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
