Journal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume 27, Issue 4, Pages 1746-1752Publisher
SPRINGER
DOI: 10.1007/s11665-018-3286-x
Keywords
laser multilayer cladding; microhardness; synchronous rolling; wear resistance
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Funding
- National Science Foundation of China [51375425, 51375426]
- Opening Project of Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology [ASMA201606]
- Scientific Foundation of Nanjing Institute of Technology [YKJ201404, CKJA201503]
- Outstanding Scientific and Technological Innovation Team in Colleges and Universities of Jiangsu Province
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A synchronous rolling method was proposed to assist laser multilayer cladding, and the effects of this method on microstructure, microhardness, and wear resistance were studied. Results show that the microstructure and mechanical properties of the traditional cladding layer exhibit periodic inhomogeneity. Synchronous rolling breaks the columnar dendrite crystals to improve the uniformity of the organization, and the residual plastic energy promotes the precipitation of strengthening phases, as CrB, M7C3, etc. The hardness and wear resistance of the extruded cladding layer increase significantly because of the grain refinement, formation of dislocations, and dispersion strengthening. These positive significances of synchronous rolling provide a new direction for laser cladding technology.
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