Effect of tungsten addition on the toughness and hardness of Fe₂B in wear-resistant Fe-B-C cast alloy

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• 作者：Zhifu Huang ; ^{hzf@mail.xjtu.edu.cn} ; Jiandong Xing ; Liangliang Lv
• 关键词：Fe&ndash ; B&ndash ; C alloy ; Fe2B ; Tungsten addition ; Fracture toughness ; Hardness
• 刊名：Materials Characterization
• 出版年：2013
• 出版时间：January, 2013
• 年：2013
• 卷：75
• 期：Complete
• 页码：63-68
• 全文大小：1421 K

文摘

The effects of tungsten additions of 0 % , 1.12 % , 2.04 % , and 3.17 % (in wt. % ) on the morphology, fracture toughness and micro-hardness of Fe₂B in Fe-B-C cast alloy were investigated. The results indicate that, with the increase of tungsten addition, the morphology and distribution of Fe₂B have no change and a new W-containing phase, except the (Fe, W)₂B with a certain tungsten solution, does not form, and that the fracture toughness of Fe₂B increases first and then decreases, while the hardness increases first and then has a little change. Compared with the fracture toughness (3.8 MPa¡¤m^1/2) of Fe₂B without tungsten addition, the toughness at 2.04 wt. % tungsten can be improved by about above 80 % and achieves about 6.9 MPa¡¤m^1/2, and variation characteristics of hardness and toughness of Fe₂B were also testified by viewing the indentation marks and cracks on the Fe₂B, respectively.