Szczegóły publikacji
Opis bibliograficzny
The effects of processing parameters on the structure and mechanical properties of structural PM steels containing Mn, Cr and Mo / M. SUŁOWSKI // Naučni Izvestiâ na Naučno-tehničeskiâ S'ûz po Mašinostroene ; ISSN 1310-3946. — 2015 — R. 23 no. 2, s. 267–272. — Bibliogr. s. 272, Abstr. — XXX international conference NDT DAYS 2015 : dni na bezrazrušitelniâ kontrol 2015 : 15–20 June 2015, Sozopol–Bulgaria
Autor
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 98463 |
|---|---|
| Data dodania do BaDAP | 2016-08-01 |
| Rok publikacji | 2015 |
| Typ publikacji | referat w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Naučni Izvestiâ na Naučno-Tehničeskiâ sʺûz po Mašinostroene |
Abstract
The effects of processing parameters on the microstructure and mechanical properties of Fe-Mn-Cr-Mo-C PM steels are described. Pre-alloyed Högänas Astaloy CrM and Astaloy CrL, low-carbon ferromanganese and graphite powders were used as the starting materials. After pressing in rigid die, the compacts were conventionally sintered at 1120 and 1250°C. Sintering was carried out for 60 minutes in atmospheres with different H2/N2 ratios. Cooling rate from sintering temperature was 65°C/min (convective cooling). The specimens were subsequently tempered at 200°C for 60 minutes in air. All specimens were tested for tensile strength (UTS), elongation (A), offset yield strength (R0.2), transverse rupture strength (TRS), impact toughness and apparent surface hardness (HV 30). After mechanical tests the microstructure of Fe-Mn-Cr-Mo-C PM steels was studied by optical microscopy. These investigations have shown that, by sintering in inexpensive and safe nitrogen-rich atmospheres, it is possible to achieve mechanical properties similar to those of specimens sintered in pure hydrogen and hydrogen-rich atmospheres.
