Correlation of Microstructure and Cracking Phenomenon Occurring during Hot Rolling of Lightweight Steel Plates
SCIE
SCOPUS
- Title
- Correlation of Microstructure and Cracking Phenomenon Occurring during Hot Rolling of Lightweight Steel Plates
- Authors
- Sang Yong Shin; Hackcheol Lee; Seung Youb Han; Chang-Hyo Seo; Kayoung Choi; Lee, S; Kim, NJ; Jai-hyun Kwak; Kwang-Geun Chin
- Date Issued
- 2010-01
- Publisher
- SPRINGER
- Abstract
- An investigation was conducted into the correlation of microstructure and the cracking phenomenon that often occurred in hot-rolled lightweight steel plates. Two kinds of steels were fabricated with varying Mn and Al contents, and their microstructures, tensile properties, and high-temperature transformation behavior were investigated. In the two steels, banded structures containing ferrite grains and kappa-carbides were well developed along the rolling direction. Detailed microstructural analyses showed that cracks initiated at film-type kappa-carbides continuously formed interfaces between bands, while the band populated with kappa-carbides did not play an important role in initiating cracks. Thus, the formation of band structures and film-type interfacial kappa-carbides must be minimized to prevent the cracking. The decreased content of hardenability elements, including aluminum, higher finish-rolling temperature, reduced central segregation during the slabmaking process, and decreased material variation during hot rolling, were suggested as practical methods for preventing the cracking.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/26006
- DOI
- 10.1007/S11661-009-0081-1
- ISSN
- 1073-5623
- Article Type
- Article
- Citation
- METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, vol. 41A, no. 1, page. 138 - 148, 2010-01
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