Surface hardening of St41 low carbon steel by using the hot-pressing powder-pack boriding method

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Abstract

This research describes a powder-pack boriding process by using hot-pressing technic for St41 low carbon steel which will improve the hardness on the substrate by forming boride layer solid solution. Those method can reduce the operational cost of the research if it is compared by the conventional method with the asmospheric condition both vacuum system and gas inert condition. The concept of boriding by hot-pressing technic was verified in a laboratory scale. Welldefined and reusedable technic was achieved by using the stainless steel 304 as the container and sealed with a 5 ton pressure. This container was filled boronizing powder consisting of 5%B4C, 90%SiC, and 5%KBF4 to close the St41 low carbon steel specimen inside the container. The St41 boriding specimen was treated at the temperature of 900°C for 8 hours. The boride layer on the substrate was found as FeB and Fe2B phase with the hardness about 1800 HV. This value was more than ten times if compared with the untreated specimen that only had the hardness of 123 HV. Depend on heat treatment temperature, heat treatment time, and powder-pack boriding pressure, the depth of boride layer range from 127 to 165 μm, leading to a diffusion controlled process.

Original languageEnglish
Title of host publication4th International Conference on Mathematics and Natural Sciences, ICMNS 2012
Subtitle of host publicationScience for Health, Food and Sustainable Energy
PublisherAmerican Institute of Physics Inc.
Pages241-244
Number of pages4
ISBN (Print)9780735412217
DOIs
Publication statusPublished - 1 Jan 2014
Event4th International Conference on Mathematics and Natural Sciences: Science for Health, Food and Sustainable Energy, ICMNS 2012 - Bandung, Indonesia
Duration: 8 Nov 20129 Nov 2012

Publication series

NameAIP Conference Proceedings
Volume1589
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference4th International Conference on Mathematics and Natural Sciences: Science for Health, Food and Sustainable Energy, ICMNS 2012
Country/TerritoryIndonesia
CityBandung
Period8/11/129/11/12

Keywords

  • boride layer
  • low operational cost
  • microhardness
  • reusedable container

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