| Full text | |
| Author(s): |
Soyama, Juliano
;
Zepon, Guilherme
;
Lopes, Thiago Pama
;
Beraldo, Leamar
;
Kiminami, Claudio Shyinti
;
Botta, Walter Jose
;
Bolfarini, Claudemiro
Total Authors: 7
|
| Document type: | Journal article |
| Source: | Journal of Materials Research; v. 31, n. 19, p. 2987-2993, OCT 2016. |
| Web of Science Citations: | 5 |
| Abstract | |
The microstructure formation and wear resistance of a superduplex stainless steel modified with the addition of 3 wt% boron produced by spray forming were investigated. Thermodynamic simulations were used as comparison basis and to explain the experimentally observed microstructure, which was composed by primary M2B-type borides, an austenitic-ferritic matrix, and eutectic M3B2-type borides. The predicted solidification sequence started with the precipitation of primary M2B boride, followed by ferrite/austenite formation and a final eutectic reaction resulting in M3B2 borides. A good correlation with the simulations and final microstructure was found. The abrasive wear resistance was investigated with the dry sand/rubber wheel test and the results indicated an outstanding performance, similar to the cobalt-based Stellite 1016 alloy. The excellent wear resistance resulted from the presence of a significant amount (about 35 vol%) of hard borides homogeneously dispersed in the microstructure, which was effective at increasing hardness and protecting the duplex matrix against abrasion. (AU) | |
| FAPESP's process: | 14/27073-0 - Study of stainless steels modified by additions of boron and nitrogen in order to obtain wear resistant materials with low friction coefficient |
| Grantee: | Juliano Soyama |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |