A New Nitriding Process of 4Cr5MoSiV1 for Extrusion Die

Abstract:

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Nitriding is one of the most efficient methods used to enhance the service life of aluminum extrusion dies. In this paper, a new nitriding process has been introduced that is characterized by that 4Cr5MoSiV1 steel, a typical material used for extrusion dies, was nitrided by using two-stage nitriding process. The microstructures of nitrided layer have been analyzed by means of optical microscope (OM), scanning electron microscope (SEM), X-ray diffraction (XRD) and microhardness (MH). The results show that pre-heat treatment on the 4Cr5MoSiV1 steel extrusion die can be carried out under the condition of quenching at 1040 °C, double tempering at 600 °C and 560 °C for 2 hours each. Operating parameters of two-stage nitriding are set as follow: stage one, 520 °C for 6 hours, the flow rate of NH3 of 0.6 m3/h; nitriding pressure of 453 Pa and stage two, 580 °C for 8 hours, the flow rate of NH3 of 0.35 m3/h; nitriding pressure of 453 Pa.

Info:

Periodical:

Edited by:

Huixuan Zhang, Ye Han, Fuxiao Chen and Jiuba Wen

Pages:

1651-1655

DOI:

10.4028/www.scientific.net/AMM.117-119.1651

Citation:

S. Y. Lin et al., "A New Nitriding Process of 4Cr5MoSiV1 for Extrusion Die", Applied Mechanics and Materials, Vols. 117-119, pp. 1651-1655, 2012

Online since:

October 2011

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$35.00

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