Affiliation:
1. School of Materials Science and Engineering Anhui University of Technology Ma'anshan 243032 China
2. Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of Education Anhui University of Technology Ma'anshan 243002 China
Abstract
Cold metal transition wire‐arc deposition of S214 bronze/316 L stainless steel bimetals is investigated, and the effects of heat input and deposited sequence on the interfacial behavior of bimetallic structure are systematically characterized. It is demonstrated that 316 L and S214 bimetals are defect‐free, with no penetrating cracks or porosity, and that satisfactory metallurgical bonding at the interface is obtained. The interface thickness with low heat input is greater than that with high heat input, and the microstructure of the interface has a honeycomb pattern. The interfacial zone presents the highest microhardness due to the formation of Fe‐based solid solutions with high copper content and intermetallic compounds such as AlCrFe2 and AlNi3. As increasing heat input, microstructure of S214 deposited layer in the S214/316 L transforms from α‐Cu+γ + Fe‐rich phase to α‐Cu + Fe‐rich phase + K phase, and 316 L deposited layer changes from lath ferrite to skeletal ferrite with the determinations of copper and cooling rate. The tensile strength of S214/316 L specimen is substantially higher than that of 316 L/S214.
Funder
National Natural Science Foundation of China
Subject
Condensed Matter Physics,General Materials Science