Warning: fopen(/home/virtual/kwjs/journal/upload/ip_log/ip_log_2024-03.txt): failed to open stream: Permission denied in /home/virtual/lib/view_data.php on line 88 Warning: fwrite() expects parameter 1 to be resource, boolean given in /home/virtual/lib/view_data.php on line 89 Investigation on Explosion Bulge Test Results of 800 ㎫ Grade Pre-heat Free Welding Consumables

Journal of KWJS 2009;27(6):80-86.
Published online January 13, 2010.
800 ㎫급 무예열 용접재료의 폭파변형성능에 관한 연구
, , , ,
 
Investigation on Explosion Bulge Test Results of 800 ㎫ Grade Pre-heat Free Welding Consumables
Taewon Park, Youngbeum Song, Jinyoung Kim, Chulgyu Park, Heejin Kim
Abstract
  The Cu-bearing PFS-700 steel which has yield strength over 700 ㎫ was developed to replace the existing submarine structural material, HY-100. The PFS-700 steel has a combination of good mechanical properties and superior weldability. Becaus of that, it can be welded without pre-heating. The application of PFS-700 steel to submarine or battle ship will give a great reduction of cost by omitting pre-heating or lowering pre-heat temperature. To develop pre-heating free welding consumables that match and take advantage of PFS-700 steel, new welding consumables have been designed for the GMAW, SAW processes and explosion bulge test(EBT) was conducted to see the reliability of welded structure. All welds were made without pre-heating, and the inter-pass temperature was below 50℃ for SAW50 and 150℃ for GMAW and SAW150. All EBT specimens show over 14% thickness reduction without through-thickness crack or crack propagation to the hole-down area. Tensile properties for all welding conditions show higher(GMAW) or similar values(SAW50, SAW150) to the base metal. Charpy impact values for the weld metal also show 163.5J(GMAW), 95.4J(SAW50) and 69.0J(SAW150), which meet the goal(higher than 50J) of this project.
Key Words: Pre-heat free steel, PFS-700, Welding consumables, Crack start test, Explosion bulge test


ABOUT
BROWSE ARTICLES
ARTICLE CATEGORY 
FOR CONTRIBUTORS
Editorial Office
#304, San-Jeong Building, 23, Gukhoe-daero 66-gil, Yeongdeungpo-gu, Seoul 07237, Korea
Tel: +82-2-538-6511    Fax: +82-2-538-6510    E-mail: koweld@kwjs.or.kr                

Copyright © 2024 by The Korean Welding and Joining Society.

Developed in M2PI