Preparation of Molybdenum High Speed Tool Steels with Addition of Niobium Carbide by Powder Metallurgy Techniques

摘要:

文章预览

High speed steels processed by Powder Metallurgy (PM) techniques present better mechanical properties when compared with similar steels obtained by the conventional process of cast to ingot and hot working. PM techniques produce improved microstructures with smaller and better distribution of carbides. Liquid phase sintering high speed steel seems to be a cheaper processing route in the manufacturing of tool steels if compared to the well-known and expansive hot isostatic pressing high speed steels. The introduction of niobium as alloying element began with the object of replacing elements like vanadium (V) and tungsten (W). Phase liquid sintering consists in a manufacturing technique to process high speed steels by powder metallurgy. The aim of this work of research is to process and obtain AISI M2 and M3:2 with and without the addition of niobium carbide by high energy milling, cold uniaxial compaction and vacuum sintering in the presence of a liquid phase. The powders of the AISI M2 and M3:2 were processed by high energy milling adding a small quantity of niobium carbide (6% in mass), then the powders were characterized by means of X-ray diffraction (XRD) and scanning electron Microscopy (SEM) plus energy dispersion spectroscopy (EDS) in order to evaluate the milling process. The powders of the AISI M2 and M3:2 with the addition of niobium carbide (NbC) were uniaxially cold compacted and then submitted to vacuum sintering. The sintered samples had their microstructure, porosity and carbide distribution observed and evaluated by means of Scanning Electron Microscopy (SEM) and the mechanical property of hardness was investigated by means of Vickers hardness tests. At least five samples of each steel were investigated.

信息:

期刊:

编辑:

Francisco Ambrozio Filho and Aloisio Nelmo Klein

页数:

102-107

引用:

O. O. de Araújo Filho et al., "Preparation of Molybdenum High Speed Tool Steels with Addition of Niobium Carbide by Powder Metallurgy Techniques", Materials Science Forum, Vol. 802, pp. 102-107, 2014

上线时间:

December 2014

输出:

价格:

$38.00

[1] P. Beiss, R. Wahling, D. Duda: Modern Developments in Powder Metallurgy Vol. 15-17 (1985), p.331.

[2] Araujo Filho – Comparative Study Of AISI M3: 2 High Speed Steel Produced Through Different Techniques Of Manufacturing – Doctoral Thesis - USP (2006).

[3] P.R. Brewin: PM High Speed Steels. (Institute of Metals1991).

[4] C. Capdevila, Y.L. Chen, N.C.K. Lassen, A.R. Jonesand, H.K.D.H. Bhadeshia: Materials Science and Technology Vol. 17 (2001), p.693.

[5] G.A. Baglyuk, L.A. Poznyak: Powder Metallurgy and Metal Ceramics Vol. 43 (2004), p.570.

[6] ASTM A600-92a Standard Specification for Tool Steel High Speed.

[7] G.A. Baglyuk, L.A. Poznyak: Powder Metallurgy and Metal Ceramics Vol. 41 (2002), p.7.

[8] P.F. Silva, A.B. Farina, M. Boccalini Jr. Technology in Metallurgy and Materials Vol. 4 (2008), p.43.

从Crossref获取数据。
这可能需要一些时间来加载。