Effect of Current on MIG Welding Parameters on Joint Properties of Between SS400 Carbon Steel and 430 Stainless Steel

Abstract

This  article  aimed  to  study  the  influence of  current  on  MIG  welding  on  the  joint property  between  SS400  carbon  steel  and 430  grade  stainless  steel  using  four  welding currents  were; 90, 100, 110  and  120  A

The  experimental  results  found  that  every  macro  welding  current  with  welding speed  400  mm/min.  gas  cover  Ar80% + CO220%  at  current  110  A.  A  weld  excellent penetration, the  surface  ware  was  a  good weld  and  suitable  for  most  welding.  Welding with  current  100 - 120  A.  was  stronger  than SS400  steel  test  pieces  because  the  lack  of tensile  test  pieces  were  not  missing  at  the weld  area.  However, there  was  a  lack  of  hot zone  (HAZ)  on  SS400  steel.  The  effect  at  110  A  of  heat  on  the  structure  of  the  work resulted  in  a  maximum  tensile  strength  of 448  MP.  From  the  study, it  was  found  that the  welding  parameters  have  an  effect  on the  melting  and  metal  water  transfer between  the  welding  wire  and  the  work piece  by  electric  current  helps  to  complete the  arc.  Low  current  affects  the  welding strength  of  the  weld.  Due  to  incomplete melting, the  lack  of  tensile  test  specimens were  absent  at  the  welding  edge  and  low tensile  strength  were  not  suitable  for welding.  All  welding  currents  gave  similar hardness  values.  It  was  found  that  the welding  area  gave  more  hardness  than  other areas.  The  HAZ  hardness  of  the  AISI  430 specimens  was  higher  than  the  HAZ  of  the SS  400  specimen  and  the  hardness  was similar  to  the  welding.  The  maximum  weld hardness  is  309  HV.