Effect of additional boron amount on the surface roughness after lathe turning of h-BN dispersed type 304 stainless steel

Masahiro Kawajiri, Satoshi Emura, Xiaohua Min, Shigeo Yamamoto, Kazuyuki Sakuraya, Kaneaki Tsuzaki

Research output: Contribution to journalArticlepeer-review

Abstract

The authors have reported that the machinability (lathe turning, drilling and sawing) of Type 304 austenitic stainless steel has been improved by the precipitation of hexagonal boron nitride (h-BN). In the present study, the influence of h-BN precipitation on surface roughness of Type 304 steel after lathe turning was investigated. Surface roughness was degraded with increasing the amount of boron addition, especially at lower cutting speed of 22 m/min. However, Type 304 steel with boron addition up to 0.05 mass % exhibited similar or better surface roughness to that of Type 303 sulfur added free-cutting steel. Precipitation of h-BN enhanced the size of built up edge and degraded the surface roughness. compared to that of commercial Type 304 steel, and 0.1 mass % boron added Type 304 steel showed better surface roughness compared On the other hand, increased Vickers hardness values due to solute nitrogen decreased the separation size of built up edge and improved the surfaced roughness.

Original languageEnglish
Pages (from-to)1542-1547
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume100
Issue number12
DOIs
Publication statusPublished - 2014

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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