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Surface Hardening of St41 Low Carbon Steel by Using the Boronizing Powder and Pressured-heating Technique

Author Affiliations

  • 1Department of Physics, Syarif Hidayatullah State Islamic University Jakarta, Jl. Juanda 95,Ciputat, Tangerang, Banten, INDONESIA
  • 2 Research Center of Material Science, Department of Physics, University of IndonesiaJl. Salemba No.4 Jakarta, INDONESIA

Res. J. Material Sci., Volume 1, Issue (10), Pages 1-5, November,16 (2013)

Abstract

The powder-pack boriding process by using pressured-heating technique was applied on the surface of St41 steel to produce the boride layer. The pressured-heating technique can reduce the operational cost of the boriding process if compared by the conventional technique. The concept of pressured-heating technique was verified in a laboratory scale. Well defined pressured-heating technique was achieved by using the stainless steel 304 as the container and sealed with a 10 kN pressure. This container was filled by boronizing powder consisting of 5%BC, 90%SiC, and 5%KBF to close the St41 steel specimen inside the container. The container was treated at the temperature of 900C with the treated time of 2, 4, 6, and, 8 hours. A single phase occurs on the substrate was found as FeB layer with the hardness about 1750 HV. This value was more than ten times if compared with the untreated specimen that only was about 123 HV. Depend on heat treatment temperature, heat treatment time, and powder-pack boriding pressure, the depth of boride layer range from 126 to 186 m.

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