Home Kovove Materialy-Metallic Materials 2019 Kovove Materialy-Metallic Materials Vol. 57 (2019), no. 5, pp.355–362

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.

Kovove Materialy-Metallic Materials Vol. 57 (2019), no. 5, pp.355–362

Title: Effect of heat inputs on microstructure and mechanical properties in CGHAZ of BWELDY960Q steel
Author: H. Qin, Y. Guo, L. Wang, P. Liang, Y. Shi, Y. Cui
Abstract: The Gleeble 1500 test machine was used to simulate the single-pass welding thermal cycle of BWELDY960Q steel under different heat input conditions. In this paper, microstructure observation and mechanical properties of BWELDY960Q steel specimens in coarse grain heat affected zone (CGHAZ) under different heat input conditions were investigated. The results show that under different heat input conditions, the microstructure of CGHAZ is lath martensite, granular bainite, or M-A constituent. As heat input increases, the number and size of the M-A constituent increase accordingly, and the microstructure gradually changes from lath martensite to granular bainite. Meanwhile, compared with the previous samples, the CGHAZ austenite grain diameter increases, and the grain size scale decreases. Furthermore, the value of the CGHAZ impact absorbing energy increases at first but then decreases, while microhardness monotonously decreases. At –20 °C compared with the base metal, the impact absorbing the energy of CGHAZ is significantly reduced, and embrittlement occurs.
Keywords: BWELDY960Q steel, heat inputs, coarse grain heat affected zone, microstructure, mechanical properties
Published online: 09-Sep-2019
Year: 2019, Volume: 57, Issue: 5 Page From: 355, Page To: 362
doi:10.4149/km_2019_5_355


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.