2007Hangkong cailiao xuebaoRequires access

Effect of Heat Treatment on Microstructure and Mechanical Properties of Cast Fe-B-C Alloy

Hanguang Fu

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Abstract

Effect of quenching temperature and cooling rate on the structure and properties of cast Fe-B-C alloy containing more than 1.0%B and lower than 0.2%C has been studied.The results show that the structure of Fe-B-C cast alloy changes from pearlite being prevailing + ferrite + a small amount of martensite to martensite being prevailing + a small amount of pearlite and to martensite matrix,and the hardness increases with the increasing of quenching cooling rate.In the case of water quenching,higher or lower quenching temperature is not advantageous to obtain full martensite.Quenching at 950~1000℃,cast Fe-B-C alloy could obtain the structure of fine lath martensite and boride with high hardness.The hardness and impact toughness of cast Fe-B-C alloy exceed 55HRC and 15J/cm2 respectively.

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What this paper is about

Effect of quenching temperature and cooling rate on the structure and properties of cast Fe-B-C alloy containing more than 1.0%B and lower than 0.2%C has been studied.The results show that the structure of Fe-B-C cast alloy changes from pearlite being prevailing + ferrite + a small amount of martensite to martensite being prevailing + a small amount of pearlite and to martensite matrix,and the hardness increases with the increasing of quenching cooling rate.In the case of water quenching,higher or lower quenching temperature is not advantageous to obtain full martensite.Quenching at 950~1000℃,cast Fe-B-C alloy could obtain the structure of fine lath martensite and boride with high hardness.The hardness and impact toughness of cast Fe-B-C alloy exceed 55HRC and 15J/cm2 respectively.

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Available abstract

Effect of quenching temperature and cooling rate on the structure and properties of cast Fe-B-C alloy containing more than 1.0%B and lower than 0.2%C has been studied.The results show that the structure of Fe-B-C cast alloy changes from pearlite being prevailing + ferrite + a small amount of martensite to martensite being prevailing + a small amount of pearlite and to martensite matrix,and the hardness increases with the increasing of quenching cooling rate.In the case of water quenching,higher or lower quenching temperature is not advantageous to obtain full martensite.Quenching at 950~1000℃,cast Fe-B-C alloy could obtain the structure of fine lath martensite and boride with high hardness.The hardness and impact toughness of cast Fe-B-C alloy exceed 55HRC and 15J/cm2 respectively.

Key concepts: Materials science, Martensite, Alloy, Boride, Pearlite, Quenching (fluorescence), Lath, Metallurgy

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