Microstructure and Properties of Fe-B-C Cast Wear-Resistant Alloy

Abstract:

The microstructure, toughness, hardness and wear resistance of Fe-B-C cast wear-resistant alloy were studied. The results indicate that, the as-cast Fe-B-C alloy comprises pearlite, ferrite and eutectic phase Fe₂ (B, C), and that, with increasing boron and carbon contents, the boride volume fraction (BVF) and macrohardness increase; furthermore, when boron content increases from about 0.5 wt.% to 2.0 wt.%, the increase trend of the macrohardness will become smaller with increasing the carbon content. The results also indicate that, after heat-treatment, the Fe₂ (B, C) becomes coarser than that as cast condition, and the boron content has less effect on the martensite hardness at the same carbon content; with increasing boron and carbon contents, the hardness of the samples increases and inversely the toughness decreases. At a lower BVF, the matrix plays a dominant role on the impact toughness of Fe-B-C alloy; however, at a higher BVF, the BVF plays a dominant role. The wear test results indicate that, with increasing the boron and carbon contents, the weight loss of the samples decreases, namely, the increase of wear resistance.

• Periodical: Key Engineering Materials (Volume 732)
• Pages: 59-68
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.732.59
• Online since: March 2017
• Authors: Zhi Fu Huang, Jian Dong Xing, Sheng Qiang Ma*, Yi Min Gao, Ming Zheng, Li Qiu Sun
• Keywords: Boron, Carbon, Fe-B-C alloy, Microstructure, Properties

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