Abstract
The authors have reported that the machinability (lathe turning, drilling and sawing) of SUS304 (Type 304) austenitic stainless steel is improved by precipitating hexagonal boron nitride (h-BN). In this study, we investigated the surface roughness after lathe turning in the h-BN precipitated SUS304 steels, where the nitrogen content was fixed at 0.2% and the boron content was changed as 0, 0.03, 0.05, and 0.1% (mass%). Surface roughness increased as the boron content increased, especially at a lower cutting speed of 22 m/min. However, SUS304 steel with boron content of up to 0.05 mass% had similar or smaller surface roughness compared with a commercial SUS304 steel, and the SUS304 steel containing 0.1 mass% boron had smaller surface roughness compared with a SUS303 (Type 303) sulfur-added free-cutting steel. Precipitation of h-BN increased the size of the build-up edge and increased the surface roughness. On the other hand, solute nitrogen increased the Vickers hardness, leading to decreased separation size of the build-up edge and decreased surfaced roughness.
| Original language | English |
|---|---|
| Pages (from-to) | 1031-1037 |
| Number of pages | 7 |
| Journal | isij international |
| Volume | 56 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jan 1 2016 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
Cite this
Effect of additional boron amount on surface roughness after lathe turning in h-BN dispersed type 304 stainless steels. / Kawajiri, Masahiro; Emura, Satoshi; Min, Xiaohua; Yamamoto, Shigeo; Sakuraya, Kazuyuki; Tsuzaki, Kaneaki.
In: isij international, Vol. 56, No. 6, 01.01.2016, p. 1031-1037.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of additional boron amount on surface roughness after lathe turning in h-BN dispersed type 304 stainless steels
AU - Kawajiri, Masahiro
AU - Emura, Satoshi
AU - Min, Xiaohua
AU - Yamamoto, Shigeo
AU - Sakuraya, Kazuyuki
AU - Tsuzaki, Kaneaki
PY - 2016/1/1
Y1 - 2016/1/1
N2 - The authors have reported that the machinability (lathe turning, drilling and sawing) of SUS304 (Type 304) austenitic stainless steel is improved by precipitating hexagonal boron nitride (h-BN). In this study, we investigated the surface roughness after lathe turning in the h-BN precipitated SUS304 steels, where the nitrogen content was fixed at 0.2% and the boron content was changed as 0, 0.03, 0.05, and 0.1% (mass%). Surface roughness increased as the boron content increased, especially at a lower cutting speed of 22 m/min. However, SUS304 steel with boron content of up to 0.05 mass% had similar or smaller surface roughness compared with a commercial SUS304 steel, and the SUS304 steel containing 0.1 mass% boron had smaller surface roughness compared with a SUS303 (Type 303) sulfur-added free-cutting steel. Precipitation of h-BN increased the size of the build-up edge and increased the surface roughness. On the other hand, solute nitrogen increased the Vickers hardness, leading to decreased separation size of the build-up edge and decreased surfaced roughness.
AB - The authors have reported that the machinability (lathe turning, drilling and sawing) of SUS304 (Type 304) austenitic stainless steel is improved by precipitating hexagonal boron nitride (h-BN). In this study, we investigated the surface roughness after lathe turning in the h-BN precipitated SUS304 steels, where the nitrogen content was fixed at 0.2% and the boron content was changed as 0, 0.03, 0.05, and 0.1% (mass%). Surface roughness increased as the boron content increased, especially at a lower cutting speed of 22 m/min. However, SUS304 steel with boron content of up to 0.05 mass% had similar or smaller surface roughness compared with a commercial SUS304 steel, and the SUS304 steel containing 0.1 mass% boron had smaller surface roughness compared with a SUS303 (Type 303) sulfur-added free-cutting steel. Precipitation of h-BN increased the size of the build-up edge and increased the surface roughness. On the other hand, solute nitrogen increased the Vickers hardness, leading to decreased separation size of the build-up edge and decreased surfaced roughness.
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U2 - 10.2355/isijinternational.ISIJINT-2015-684
DO - 10.2355/isijinternational.ISIJINT-2015-684
M3 - Article
VL - 56
SP - 1031
EP - 1037
JO - ISIJ International
JF - ISIJ International
SN - 0915-1559
IS - 6
ER -