Quantitative evaluation of porosity effects in sintered and heat treated high performance steels
| Autor: | Mónica Campos, D. Klint, José Manuel Torralba, L. Blanco |
|---|---|
| Rok vydání: | 2005 |
| Předmět: | |
| Zdroj: | Powder Metallurgy. 48:315-322 |
| ISSN: | 1743-2901 0032-5899 |
| DOI: | 10.1179/174329005x82199 |
| Popis: | Many heavy duty components suitable for production by powder metallurgy (PM), such as transmissions and also safety parts, require mechanical properties characteristic of high density. Therefore, the ability to produce PM parts of high density has the potential to expand the use of sintered components beyond its present limitations. The purpose of the present study was to investigate the features of pores, to establish quantitative correlations under different sintering conditions and to compare the effects of heat treatments such as case hardening on the pore distribution in the as sintered state. An approach involving quantitative analysis of the upper 10% of the pore size distribution was also employed because these bigger pores have the greatest influence on mechanical properties (especially the dynamic ones). Pore area, maximum length and roundness were analysed for compacts of several densities. A comparison of average values was made to detect differences in pore characteristics among densi... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|