The effects of flash allowance and upset allowance on microstructures and mechanical properties of flash butt welded RS590CL steel joints
- Resource Type
- Authors
- C. Y. Xi; Z. Z. Xuan; Daqian Sun; G. S. Song; J. G. Wang
- Source
- Journal of Materials Research. 31:3968-3980
- Subject
- Materials science
Mechanical Engineering
Metallurgy
Allowance (engineering)
02 engineering and technology
Bending
Welding
021001 nanoscience & nanotechnology
Condensed Matter Physics
Upset
020501 mining & metallurgy
law.invention
Flash welding
0205 materials engineering
Mechanics of Materials
law
Flash (manufacturing)
Ferrite (iron)
Formability
General Materials Science
0210 nano-technology
- Language
- ISSN
- 2044-5326
0884-2914
The flash allowance and upset allowance have significant effects on characteristics of flash butt welded RS590CL steel joints. The overheated zone (OZ) widths increased with flash allowance (δf) increase, and decreased as the upset allowance (δu) increased. The coarsened upper bainite was formed in interface zone (IZ) and OZ as δf increased. With increasing δu, the large plastic deformation occurred and the interface formability improved. The hardness in IZ was a little lower than that in its vicinity OZ due to some ferrite existence and dislocation amount decreased in IZ. The tensile strengths of flash butt welding (FBW) joints were in good match with base metal and the ductilities were lower. The maximum bending crack length was 0.68 mm which indicated that the bending properties of FBW joints were good. Under this experiment, relatively large δf (10–12 mm) and δu (5.5–6.5 mm) were recommended for the benefit of high quality FBW joints.