轧后冷却工艺对含硼贝氏体钢组织和力学性能的影响
EFFECT OF COOLING PROCESS AFTER ROLLING ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF BORON CONTAINING BAINITIC STEEL
赵燕青 1石帅 1高云哲 1弓俊杰 1禹青霄 1和晓民 2吴艳阳3
作者信息
- 1. 河钢材料技术研究院,河北石家庄 050023
- 2. 河钢集团石钢公司,河北 石家庄 050000
- 3. 河钢集团舞钢公司,河南平顶山 462500
- 折叠
摘要
含硼贝氏体钢具有高强度、高韧性和良好的焊接性能.本文采用拉伸试验机、冲击试验机及扫描电镜研究了轧后冷却工艺对含硼贝氏体钢组织和力学性能的影响.结果表明:轧后冷却工艺对轧态、淬火态和回火态试验钢的组织和力学性能有明显的影响.轧后空冷工艺下回火态试验钢的-20 ℃冲击功为268 J,轧后水冷工艺下回火态试验钢的-20 ℃冲击功为280 J,轧后水冷工艺下回火态试验钢的冲击性能最佳;轧后空冷工艺下轧态试验钢的组织主要为粒状贝氏体,轧后水冷工艺下轧态试验钢的组织主要为板条贝氏体和少量的粒状贝氏体,轧后空冷和水冷工艺下淬火态试验钢的组织均为板条贝氏体,轧后空冷和水冷工艺下回火态试验钢的组织均为回火索氏体.相较于轧后空冷工艺,轧后水冷工艺下试验钢轧态、淬火态和回火态的组织均得到细化.
Abstract
Boron-containing bainite steel has high strength,high toughness and good weldability.The effect of cooling process after rolling on the microstructure and mechanical properties of boron-containing bainite steel was studied by tensile testing machine,impact testing machine and scanning electron microscopy.The results show that the cooling process after rolling has obvious influence on the microstructure and mechanical properties of rolled,quenched and tempered experimental steels.The-20 ℃ impact energy of the tempering test steel in the air cooling process after rolling is 268 J,and the-20 ℃ impact energy of the tempering test steel in the water cooling process after rolling is 280 J.The impact performance of the tempering test steel in the water cooling process after rolling is the best.The microstructure of rolled test steel under air cooling after rolling is mainly granular bainite,the microstructure of rolled test steel under water cooling after rolling is mainly lath bainite and a small amount of granular bainite,the microstructure of rolled test steel under air cooling after rolling and water cooling is lath bainite,and the microstructure of tempered test steel under air cooling after rolling and water cooling is tempered sorbite.Compared with air cooling after rolling,the microstructure of rolled,quenched and tempered steel under water cooling after rolling is refined.
关键词
硼/贝氏体钢/空冷/水冷/淬火/回火索氏体/冲击功Key words
boron/bainite steel/air cooling/water cooling/quenching/tempered sorbite/impact work引用本文复制引用
出版年
2024
NETL
NSTL
万方数据