Weldability of an abrasion-resistant steel
- U.S. Steel Technical Center, Monroeville, PA (United States)
The welding performance of a low-carbon-equivalent, abrasion-resistant steel newly developed for the mining industry was studied using a combination of simulative and actual weldability tests. The susceptibility to hydrogen-induced cracking in the weld-metal and heat-affected zones (HAZ), as well as the potential loss of strength and toughness in the HAZ, were evaluated. Simulative testing included the use of the Gleeble 1500 thermomechanical simulator to produce single and multiple-pass weld HAZ microstructures on CVN-size specimens. The effects of heat input, interpass temperature, and post-weld heat treatment (PWHT) on the HAZ microstructure and properties were determined. Additionally, a computer software was used to predict theoretical HAZ hardnesses and volume fraction of phases as a function of cooling rates. The actual welding tests included the Gapped Bead-on-Plate and the Y-groove tests to determine the weld-metal and HAZ susceptibility to hydrogen-induced cracking. Three heat inputs, two diffusible hydrogen and two weld-metal yield-strength levels were used for the actual welding stage. Good correlation was found between microstructure predictions, physical simulations, and actual weld testing results. The new steel was found to be highly weldable because of the low preheat required to avoid HAZ hydrogen induced cracking. All aspects of weld-metal and HAZ cracking behavior had to be addressed for a complete weldability characterization. It was also found that use of excessive heat inputs and PWHT should be avoided when welding this type of steels.
- OSTI ID:
- 234247
- Report Number(s):
- CONF-951026-; ISBN 0-87170-555-9; TRN: IM9624%%288
- Resource Relation:
- Conference: Materials Week `95, Cleveland, OH (United States), 29 Oct - 2 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of High performance structural steels: 1995 conference proceedings; Asfahani, R. [ed.]; PB: 321 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Stress Relaxation Cracking of Alloys at Temperatures Higher Than 540°C
Weldability and toughness evaluation of pressure vessel quality steel using the shielded metal arc welding (SMAW) process
Related Subjects
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
MINING EQUIPMENT
MATERIALS
LOW ALLOY STEELS
WELDABILITY
WELDED JOINTS
HEAT AFFECTED ZONE
MECHANICAL PROPERTIES
MICROSTRUCTURE
WEAR RESISTANCE
HYDROGEN EMBRITTLEMENT
CRACK PROPAGATION
FRACTURE PROPERTIES
THEORETICAL DATA
EXPERIMENTAL DATA