| Autor: |
Hua Cui, Jin Feng Huang, Yi Peng Yu, Ji Shan Zhang, Yuan Hua Cai |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
Advanced Materials Research. :3-7 |
| ISSN: |
1662-8985 |
| DOI: |
10.4028/www.scientific.net/amr.418-420.3 |
| Popis: |
The M3 type high speed steel billets with / without Nb addition were prepared via spray forming. The effects of cooling rate and Nb on the microstructures and property of the M3 type high speed steel were investigated. The results show that the as-cast steels contain coarse primary dendrites and M2C eutectic carbide, but the equiaxed grains and fine carbides are formed in the spray-formed steels. It can be seen that carbide precipitation and grain growth were suppressed by high cooling rate. The Nb additions can change the types of primary carbides. The solidified carbide microstructure was effectively changed from M2C to M6C type during the cooling of hot spray-formed billet. Niobium improves the microstructural thermostability of the M3 type high speed steel during heat treatments. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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