A Study of Abrasion Resistant Cast Fe-B-C Alloy

Acta Metall Sin

2006, Vol. 42

Issue (5): 545-548 DOI:

Research Articles

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A Study of Abrasion Resistant Cast Fe-B-C Alloy

FU Hanguang

清华大学

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FU Hanguang. A Study of Abrasion Resistant Cast Fe-B-C Alloy. Acta Metall Sin, 2006, 42(5): 545-548 .

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Abstract The solidification structures of cast Fe-B-C alloy containing more than 2.0%B and lower than 0.2%C and the structures and properties of alloy after heat treatment were researched by means of optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), hardness measurements, impact tester and pin abrasion tester. The results show that the solidification structures of cast Fe-B-C alloy are made up of boride (Fe2B), pearlite and ferrite, and boride distributes along grain boundary in network form. After normalizing at 950oC, the part broken network of boride of cast Fe-B-C alloy appears, the matrix all transforms into lath martensite. The hardness of cast Fe-B-C alloy increases obviously and nears to60HRC, its impact toughness and dynamic fracture toughness excel 10J/cm2 and 30MPa.m1/2 respectively. In the condition of dry skimming wear, cast Fe-B-C alloy has excellent abrasion resistance. Its abrasion resistance is more excellent than that of Ni-hard white cast iron, GCr15 and Cr12MoV, nears to that of high chromium white cast iron. Cast Fe-B-C alloy has simple melting process and good casting property, there are no costly nickel and molybdenum elements and low production cost.

Key words: cast Fe-B-C alloy boride lath martensite abrasion resistance

Received: 26 August 2005

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