Mathematical models of three-dimensional temperature fields in underwater welding with moving heat sources are built. Double ellipsoid Gauss model is proposed a
Submerged arc welding(SAW) has shortcoming of over heat input,which increases grain size in heat-affected zone(HAZ) and decreases welding quality and mechanical
In this paper,resistance spot welding were performed on 1mm-thickness magnesium AZ31B plates.The effect of welding current on the microstructure and tensile she
A new type oxidation resistance in situ Cr7C3/γ-Fe ceramic composite coating was fabricated on hardened and tempered grade C steel by reactive plasma clad with
Enterprises and their products require corresponding international qualifwation when they participate in international market competition after China joined WTO