Home CONTACT Kovove Materialy-Metallic Materials 2017 Metallic Materials Vol. 55 (2017), no. 5, pp.323-332

Journal info

Select Journal







Webshop Cart

Your Cart is currently empty.
Info: Your browser does not accept cookies. To put products into your cart and purchase them you need to enable cookies.

Metallic Materials Vol. 55 (2017), no. 5, pp.323-332

Title: Effect of tempering on microstructure and properties of Fe-Cr-B-Al alloy
Author: J. JU, H.-G. FU, Z.-G. XING, Y.-P. LEI
Abstract: The effect of tempering on the microstructure, mechanical properties and wear resistance of cast Fe-10wt.%Cr-1.5wt.%B-2wt.%Al (referred to as Fe-Cr-B-Al) alloy after quenching at 1100 °C has been investigated in the present study. The results show that microstructure of tempered Fe-Cr-B-Al alloy consists of tempered martensite, massive ferrite and discontinuous eutectic borocarbide. With the increasing tempering temperature, the retained austenite is gradually transformed into martensite. When the tempering temperature is higher than 450 °C, the content of ferrite in the matrix increases gradually, however, the content of martensite decreases gradually. There was no significant change in the morphology of borocarbide. With the tempering time (4–12 h) and tempering cycle increasing, the content of ferrite in the matrix increases gradually. When the tempering temperature is lower than 450 °C, the hardness of Fe-Cr-B-Al alloy has no obvious change. With the increasing temperature, the hardness gradually decreases. The hardness of Fe-Cr-B-Al alloy almost reaches the highest value after once tempering and decreases slightly after tempering for two or three cycles. With the extension of tempering time, it is beneficial to the precipitation of carbide, and the hardness of Fe-Cr-B-Al alloy increases gradually. When the tempering time is too long, the hardness begins to decrease. Fe-Cr-B-Al alloy has excellent wear resistance while quenching at 1100 °C and tempering at 450 °C; the main wear mechanism is cutting wear and ploughing effect.
Keywords: Fe-Cr-B-Al alloy, tempering temperature, tempering time, microstructure, hardness, wear resistance
Published online: 08-Nov-2017
Year: 2017, Volume: 55, Issue: 5 Page From: 323, Page To: 332
doi:10.4149/km_2017_5_323


download file


© AEPress s.r.o
Copyright notice: For any permission to reproduce, archive or otherwise use the documents in the ELiS, please contact AEP.