البنية البلورية والية الربط لوصلة لحام تبريس الفولاذ / الفولاذ المقاوم للصدأ باستخدام اسلاك لحام مختلفة

  • فاضل عباس هاشم قسم الهندسة الميكانيكية /كلية الهندسة - جامعة ذي قار
  • شذى زناد درويش قسم الميكانيك - معهد اعداد المتدربين بغداد
  • رائد كاظم سالم هندسة اللحام/ الكلية التقنية بغداد

Abstract

The aim of this work is to study the possibility of braze welding of austenitic steel
AlSl316L , Low carbon steel A 283 Grade C , and austenitic stainless steel to low carbon steel by
using Shielded Metal Arc Welding and oxyfuel gas welding equipment .
Specimens with square-butt joint design and 2,5, and 7 mm gaps were joined using four
different types of filler metal DIN SCuZn40Si , DIN ELCuSn7 , DIN ELCuSi3 , and DIN ENiBG11.
Other
factors
were
kept
constant
at
100
A
,
22
V
,
and
5
mm
of
metal
thickness
.

Microstructures
and
mechanical
tests
(
Tensile
test
and
Bending
text
)
were
performed
to
study

the
properties
of
welding
specimens
.
From
microscopic
examination
,it was found that the bonding by braze using OFW with SCuZn40Si filler was similar to that of brazingprocess.
On the other hand the bonding result from braze using SMAW with ELCuSi3 and ELCuSn7 were
intermediate between brazing and electric are welding while the use of ENi-BG11 filler by
SMAW shows a bond exactly as that of electric arc welding. Results show that maximum tensile
strength and bending force can be achived by ENi-BG11 filler 

Published
2019-04-28
Section
Articles