| Summary: | 碩士 === 國立交通大學 === 工學院碩士在職專班精密與自動化工程學程 === 93 === The purpose of this research is to study the effect of adding several fluxes on the weld penetration and mechanical properties of SAE 1020 carbon steel weldment using MIG weldimg process.
The fluxes included MoO3, Fe2O3, SiO2, MgCO3 and mixed flux MoO3(60%)+Fe2O3(40%),MoO3(60%)+SiO2(40%),MoO3(80%)+MgCO3,Fe2O3(40%)+SiO2(60%) and flux core of SAE 1020 carbon steel.
The results show : (1)All of seven active fluxes can increase weld penetration and depth/width ratio effectively, especially for high energy. (2)The flux MoO3(60%)+SiO2(40%) is the best of seven fluxes according to the weld penetration and depth/width ratio during MIG flux process. (3)The flux MgCO3 has greatest effect on the area of fusion zone. (4)The contraction of plasma arc is the major reasons of deep penetration of fusion zone with the use of flux. (5)Adding flux into the weldment can influence the mechanical properties.
|
|---|
