Effects of Amount of Boron Addition on Properties of Gas Atomized Fe-Cr-B Powder for Shot Peening

Sawada Toshiyuki, Yanagitani Akihiko

doi:10.2320/jinstmet.73.401

Bibliographic Information

Other Title

ショットピーニング用Ｆｅ‐Ｃｒ‐Ｂ系ガスアトマイズ粉末の諸特性に及ぼすＢ量の影響
ショットピーニング用Fe-Cr-B系ガスアトマイズ粉末の諸特性に及ぼすB量の影響
ショットピーニングヨウ Fe Cr Bケイガスアトマイズフンマツノショトクセイニオヨボス Bリョウノエイキョウ

Search this article

Abstract

Shot peening is a surface treatment effective to obtain compressive residual stress on shot peened surface and to improve fatigue strength, and it is applied to automobile parts such as springs and gears. Based on recent trend for further reduction of automobile parts weight, higher hardness of automobile parts is required through various treatments such as carburizing.<br> In this study, the effects of the amount of B addition on properties of gas atomized Fe-8Cr-B(mass%) powders for shot peening were examined. Including Fe-8Cr-6.5B as base composition, alloys with the amount of B addition from 4 to 9.5 mass% were gas-atomized and examined. The amount of Fe₂B phase and Vickers hardness increased with the increase of the amount of B addition, and high hardness of 1200HV was obtained in alloys with more than 6.5 mass% B addition. Density decreased with the increase of the amount of B addition, and 7.14 Mg/m³ was obtained in the alloy with 9.5 mass% B addition. No crack initiated near indentation by 1000 g load in the alloys with the amount of B addition from 5.5 to 6.5 mass%.<br>

Journal

Journal of the Japan Institute of Metals and Materials

Journal of the Japan Institute of Metals and Materials 73 (5), 401-406, 2009

The Japan Institute of Metals and Materials

Keywords

Details 詳細情報について

Export