Analysis of Peritectic Transformation Contraction of 304 Stainless Steel Using Surface Roughness
| Autor: | Jun Li Guo, Jiao Jiao Fu, Ping Tang, Guang Hua Wen |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Mechanical Engineering 0211 other engineering and technologies 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Transformation (music) Mechanics of Materials Surface roughness General Materials Science Composite material 0210 nano-technology Contraction (operator theory) 021102 mining & metallurgy |
| Zdroj: | Materials Science Forum. 1005:10-17 |
| ISSN: | 1662-9752 |
| Popis: | Peritectic transformation contraction of ferrite to austenite plays an important role in the formation of cracks for steels. In order to evaluate the peritectic transformation contraction of steels at the initial solidification, the solidification of 304 stainless steel under different cooling rates were carried out by using high temperature laser confocal microscopy, and then the surface roughness and peritectic transformation contraction were analysed in combination with the microstructure of solidified steel. The result shows that the solidification model of 304 stainless steel was ferrite-austenite model in the experiments, and peritectic transformation occurred during solidification. The residual ferrite in the as-cast structure were vermicular, skeletal and reticular in turn with the increase of cooling rate. The volume contraction caused by peritectic transformation resulted in wrinkles (surface roughness) appearing on the grain surface. The peritectic transformation contraction that was affected by surface roughness increased first and then decreased with cooling rate increasing, indicating the peritectic transformation contraction can be evaluated by the surface roughness. |
| Databáze: | OpenAIRE |
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