工程科学学报2016，Vol.38Issue(7)：973-978,6.DOI:10.13374/j.issn2095-9389.2016.07.012
局部感应加热对高强钢方管二次辊压成形的影响
Effect of local induction heating on secondary roll-forming of high strength square tubes
彭雪锋 1陈强 1王宇 1刘靖 1韩静涛 1晏培杰2
作者信息
- 1. 北京科技大学材料科学与工程学院，北京100083
- 2. 上海宝钢型钢有限公司，上海201900
- 折叠
摘要
Abstract
The formability of corners was improved by heating the corner area of high strength square tubes with induction coils. Under the premise of not impacting the undeformed zone, we obtained the ideal sectional dimension, microstructure and properties of products. In the hot roll forming process, the billet accumulated at the outside area of square corners without mold restrictions. With rising temperature, the accumulation became more serious. At the same time, microcracks deteriorated on the surface of the inner tube, while the cracks grew up in a form of arborization. A self-tempering process would be produced by residual temperature after hot roll forming, which could significantly reduce the residual stress. The residual stress sharply decreased as the temperature increased. When the heating temperature was above 650℃, the influence of self-tempering on the residual stress was greater than the extended capability of macrocracks and played a leading role; there was no crack when the distance was larger than 2/3 of diagonal length at flattening test.关键词
高强钢/方管/辊压成形/感应加热/显微裂纹Key words
high strength steel/tubes/roll forming/induction heating/microcracks分类
矿业与冶金引用本文复制引用
彭雪锋,陈强,王宇,刘靖,韩静涛,晏培杰..局部感应加热对高强钢方管二次辊压成形的影响[J].工程科学学报,2016,38(7):973-978,6.
