Advanced Search  
JWJ > Volume 28(1); 2010 > Article
Journal of KWJS 2010 February;28(1) :66-71.
Published online March 10, 2010.
A Study of Weldability for Pure Titanium by Nd:YAG Laser(Ⅳ) - Lap Welding and Application for Heat Exchanger
Jong-Do Kim, Myung-Sub Kwak, Chang-Je Lee, Byung-Lea Kil



Correspondence:   Published online March 10, 2010
ABSTRACT
  With large specific strength and outstanding corrosion resistance and erosion resistance in sea water, titanium and titanium alloy are widely used in heat exchanger production. In particular, pure titanium demonstrates outstanding molding performance and may be considered optimal for production of heat exchanger. Since titanium is very vulnerable to oxidation and embrittlement during welding, processes with less heat input are widely used, and laser welding is widely applied by considering production performance and shield etc in atmosphere.
  So far, 1st report and 2nd report compared and analyzed embrittlement degrees by bead colors of weldment through oxygen and nitrogen quantitative analysis and hardness measurement, and evaluated welding performance and mechanical properties of butt welding.
  This study evaluated field applicability of lap welding to heat exchange plate of LPG re-liquefaction device for ships through tensile stress test, hardness test and internal pressure test etc after deducing optimal welding condition and applying to actual heat exchange plate. In bead overlap area, the experiment produced sound welds with no porosity or defect by increasing and decreasing laser power, and tensile-shear test results indicated virtually the same tension and yield strength as base metal. As a result of measuring hardness at lateral cross section and bead overlap zone of actual heat exchanger welds, hardness difference within 20Hv was produced at base metal, HAZ and weldment, and as a result of pneumatic and hydraulic pressure test, no leakage occurred.
Keywords: Pure titanium;Nd;YAG laser;Tensile-shear strength test;porosity;Slope up & down
TOOLS
PDF Links  PDF Links
Full text via DOI  Full text via DOI
Download Citation  Download Citation
CrossRef TDM  CrossRef TDM
  E-Mail
Share:      
METRICS
877
View
0
Download
Related articles
The Study for Improving the Weldability of Pure Titanium Sheet by Using Fiber Laser - The Effect of Shielding Gas Nozzle Variable -  2016 October;34(5)
A Study of Weldability for Pure Titanium by Nd:YAG Laser(Ⅲ) - Weld Properties of Edge Welding  2009 December;27(6)
A Study of Weldability for Pure Titanium by Nd:YAG Laser(Ⅱ) - Welding Properties of Butt Welding  2009 December;27(6)
A Study of Weldability for Pure Titanium by Nd:YAG Laser(I) - Weld Properties with Shield Conditions  2009 October;27(5)
A Study on the Development of Arc Sensor for Flux Cored Arc Welding Process and its Application for Seam Tracking   1992 December;10(4)
The Study for Improving the Weldability of Pure Titanium Sheet by Using Fiber Laser - The Effect of Shielding Gas Nozzle Variable -  2016 October;34(5)
A Study of Weldability for Pure Titanium by Nd:YAG Laser(Ⅲ) - Weld Properties of Edge Welding  2009 December;27(6)
A Study of Weldability for Pure Titanium by Nd:YAG Laser(Ⅱ) - Welding Properties of Butt Welding  2009 December;27(6)
A Study of Weldability for Pure Titanium by Nd:YAG Laser(I) - Weld Properties with Shield Conditions  2009 October;27(5)
A Study on the Development of Arc Sensor for Flux Cored Arc Welding Process and its Application for Seam Tracking   1992 December;10(4)
e-sciencecentral
Register for e-submission
Register here to access the e-submission system of Journal of KWJS for authors and reviewers.
Manuscript Submission
To submit a manuscript, please visit the Journal of KWJS e-submission management system at http://submit.e-jwj.org, read the Instructions for Authors, and log into the Journal of KWJS e-submission system. For assistance with manuscript submission, please contact: koweld@kwjs.or.kr.
Free archive
Anyone may access any past or current articles without logging in.
Editorial Office
The Korea Science and Technology Building, New B/D, Room 503
Teheran-ro 7-gil, 22(635-4, Yeoksam-Dong), Gangnam-gu, Seoul 06130, Korea
TEL : +82-2-538-6511    FAX : +82-2-538-6510   E-mail: koweld@kwjs.or.kr
Browse Articles |  Current Issue |  For Authors and Reviewers |  About
Copyright© by The Korean Welding and Joining Society. All right reserved.