Research on Microstructure and Property of V-alloyed Superbainite Steel
-
摘要: 设计并在实验室冶炼了一种低碳、低合金含量的新型含钒贝氏体钢,在Gleebe-1500热模拟实验机上进行模拟空冷相变实验,根据冷却过程中的热膨胀曲线和冷却后的金相组织,确定出贝氏体转变温度区间。在此基础上,选择不同的热处理温度对实验钢进行等温处理,检验热处理后的组织,根据不同温度热处理后的组织和贝氏体转变温度区间,在320℃下对实验钢种进行贝氏体低温等温转变处理,观察等温处理后试样的金相组织,并进行拉伸实验,得到抗拉强度为1 182 MPa,延伸率为19%的良好综合性能。研究结果表明,所设计的新型超级贝氏体钢经过低温等温转变处理可得到贝氏体组织,具备优良的综合性能。Abstract: A new bainite steel with low carbon and low alloy additions is designed and refined in laboratory.The phase transformation test at air cooling condition is carried out on Gleebe-1500 thermal simulator.Bainite transformation range is decided according to the dilation curve and microstructure.Then isothermal processing tests are performed at different temperatures and resulting microstructures are observed.According to the isothermical processing test results the samples are treated by isothermal heat treatment at 320℃ for different time.The following tensile tests indicate that the steel has a good comprehensive property with the ultimate strength of 1 182 MPa and total elongation of 19.0%.The research results demonstrate that bainite microstructure and good strength and toughness can be obtained through short-time bainite transformation.
-

计量
- 文章访问数: 82
- HTML全文浏览量: 16
- PDF下载量: 2
- 被引次数: 0