2013
DOI: 10.2355/isijinternational.53.1841
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Machinability Improvement and Its Mechanism in SUS304 Austenitic Stainless Steel by Precipitated Hexagonal Boron Nitride

Abstract: To improve the machinability of SUS304 (Type 304) austenitic stainless steels, specimens were prepared containing 0.016 mass% boron and 0.2 mass% nitrogen, and hexagonal boron nitride (h-BN) particles with a diameter of 1 to 5 μm were precipitated. Precipitation of h-BN reduced the cutting force and tool wear during lathe turning with a cemented carbide tool insert, especially at cutting speeds of 40 m/min and higher. The reduction in cutting force appeared attributable to internal lubrication by h-BN in the c… Show more

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Cited by 8 publications
(6 citation statements)
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“…Sample 0B, which only contained nitrogen, exhibited the lowest surface roughness, and the surface roughness increased with the boron content. As we described previously, 14) the addition of 0.016 mass% boron reduced the cutting force and increased the tip disposability. Therefore, the amount of boron added to improve machinability should be minimized for applications in which the surface roughness after lathe turning is important.…”
Section: Effect Of B U E Formation On Surface Roughnessmentioning
confidence: 55%
See 2 more Smart Citations
“…Sample 0B, which only contained nitrogen, exhibited the lowest surface roughness, and the surface roughness increased with the boron content. As we described previously, 14) the addition of 0.016 mass% boron reduced the cutting force and increased the tip disposability. Therefore, the amount of boron added to improve machinability should be minimized for applications in which the surface roughness after lathe turning is important.…”
Section: Effect Of B U E Formation On Surface Roughnessmentioning
confidence: 55%
“…This means that samples that form larger B. U. E.s during lathe turning have larger surface roughnesses. In our previous paper, 14) we compared the B. U. E.s of h-BN precipitated SUS304 steel with 0.016 mass% boron and 0.2 mass% nitrogen addition, with that of SUS304 steel with only 0.2 mass% nitrogen addition. The size of the B. U. E. increased with h-BN precipitation.…”
Section: Effect Of B U E Formation On Surface Roughnessmentioning
confidence: 99%
See 1 more Smart Citation
“…acts as a lubricant in steel machining processes [11][12][13][14]. Available data show that non-metallic inclusions of boron nitride do not affect anisotropy of mechanical properties, increase strength, have positive effect on steel machinability and no negative environmental impact [15][16][17][18][19][20].…”
Section: Introductionmentioning
confidence: 99%
“…Austenitic stainless steel is among the difficult-to-cut material and difficulties such as poor surface finish and rapid tool wear are common. [4][5][6][7][8] Stainless steels are widely used in several industrial sectors, such as engine production, the medical and chemical industries. Their high strength, low thermal conductivity, high ductility and high tendency towards work hardening are the main factors for their poor machinability.…”
Section: Introductionmentioning
confidence: 99%