正火型460 MPa级容器钢的研制及焊接热模拟试验

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基金项目:

2014年江西省主要学科学术和技术带头人培养计划,项目编号20142BCB22011。

Development and Welding Thermal Simulation Test of the Normalizing Type 460 MPa Steel for Container

1. Department of Engineering Steels, Central Iron and Steel Research Institute, Beijing 100081, China;
2. Xinyu Iron and Steel Group Co., Ltd., Xinyu 338001, Jiangxi, China

摘要: 以C-Mn-Si为基础,通过VN微合金化,添加适量镍的成分设计思路,采取控轧和正火工艺,生产出低屈强比高强韧容器用钢板。对正火板进行焊接热模拟试验,结果表明:随着t_8/5时间的增加,即热输入的提高,焊接热影响区的硬度和冲击值下降,铁素体含量和晶粒尺寸是主要影响因素;热输入为12.36~14.27 kJ/cm时,可以获得良好CGHAZ性能。
- 容器钢 /
- VN微合金化 /
- 正火 /
- 焊接热模拟
Abstract: A C-Mn-Si base chemistry with Ni addition and V-N microalloying had been designed for producing low yield strength high toughness steel plate via control rolling and normalizing process.The resulted steel plate had been conducted welding thermal simulation test.Welding test results show that with the increase of t_8/5 time,ie,the increase of heat input,the hardness and impact value of HAZ decreases.Microstructure observation indicates that volume fraction and grain size of ferriteare the main reason for the deterioration of CGHAZ performance.Good CGHAZ performance can be achieved at 12.36～14.27 kJ/cm of heat input.
- container steel /
- VN microalloying /
- normalizing /
- welding heat simulation