研制出一种新Fe-Mn-Al-Cr系奥氏体热强钢37Mn31Al3Cr2MoVWNbB。它经1150℃ 1h W.Q.+790℃ 20h A.C.处理后,存在V_4C_3,NbC与M_3B_2等合金相,其中V_4C_3具有显著的强化作用,使其高温强度接近A-286的水平。由于加入少量Cr,Cr与Al的复合作用明显地提高抗氧化性能。同时,Cr也促进X相的形成,故长期时效过程中除析出Laves相外,还产生了少量X相。 以37Mn31Al3Cr2MoVWNbB钢制成一小批精锻涡轮增压器叶片,在海轮上成功地净转运3400h。 这些实验结果说明,Fe-Mn-Al-Cr系奥氏体钢具有发展成为一种新奥氏体热强钢的可能性。
An attempt was made to develop a new austenitic heat-resisting steel of FeMn-Al-Cr system. An experimental steel 37Mn31A13Cr2MoVWNbB has been investigated. It was resulted that the alloy phases such as V_4C_3, NbC and M_3B_2 are found in the steel after treatment under 1150℃ 1h, W.Q.+790℃ 20h, A. C. Among them, the V_4C_3 contributes markedly to the strength of the steel toward such extent that its high temperature strength approached that of A-286. Its resistance to oxidation is obviously improved due to a less addition of Cr combined with Al. Cr can also promote the precipitation of X-phase if the steel aged for a long period up to 500h at 650℃ besides the Laves-phase. Some blades made of this steel were equipped on a turbosupercharger which has been successfully operated in a seagoing vessel for several thousands hours. It may be predicted that the developing austenitie heat-resisting steel of Fe-Mn-Al-Cr system seems to be quite a hopeful onefar certain industrial applications.
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| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] |
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