Lap and butt joints of dissimilar stainless steels welded by CO2 laser

Giuseppe Daurelio; G. Dionoro; F. Memola Capece Minutolo; Christos N. Panagopoulos

doi:10.1117/12.144572

4 May 1993 Lap and butt joints of dissimilar stainless steels welded by CO2 laser

Giuseppe Daurelio, G. Dionoro, F. Memola Capece Minutolo, Christos N. Panagopoulos

Proceedings Volume 1810, 9th International Symposium on Gas Flow and Chemical Lasers; (1993) https://doi.org/10.1117/12.144572
Event: Ninth International Symposium on Gas Flow and Chemical Lasers, 1992, Heraklion, Greece

Abstract

This work concerns the lap welding of dissimilar (AISI 304 - 430, AISI 430 - 304, AISI 316 - 430, and AISI 430 - 316) stainless steels and the butt welding of dissimilar (AISI 304 - 316 and AISI 304 - 430) ones using a fast axial flow 2 kW cw CO₂ laser (B.O.C. Laser Ltd.). Two covering gases, He and N₂, are used fed coaxially to the laser beam through a 12 mm outlet diameter nozzle at a flow rate varying from 1.67 to 1.87 X 10-3)m³/s. The influence of the process parameters, such as power level, covering gas, and speed on the quality of the welded joints is examined. In the second part of the work laser lap and butt welds of dissimilar stainless steels are characterized by macro and micro graphic investigations to enable structural evaluations. Fillet weld morphology and quality of the same specimens is examined for the two different covering gases, He and N₂. Moreover, the different structural aspects of the melted zones obtained with laser welds of the same pair of stainless steels, but with the beam impinging first on the austenitic stainless steel (e.g., AISI 304 - 430) and then the ferritic one (e.g., AISI 430 - 304), or vice versa, are also studied and evaluated.

Citation Download Citation

Giuseppe Daurelio, G. Dionoro, F. Memola Capece Minutolo, and Christos N. Panagopoulos "Lap and butt joints of dissimilar stainless steels welded by CO2 laser", Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); https://doi.org/10.1117/12.144572

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available