P对铸造S44660超级铁素体不锈钢组织与力学性能的影响
Effects of P on Microstructure and Mechanical Properties of Cast S44660 Super Ferritic Stainless Steel
刘子枫 1解志文 2宁礼奎 3肖传民 4刘恩泽 3谭政 3佟健 3李海英 3王增睿 5徐忻垚 6郑志3
作者信息
- 1. 辽宁科技大学机械工程与自动化学院,辽宁鞍山 114051;中国科学院金属研究所,辽宁沈阳 110016
- 2. 辽宁科技大学机械工程与自动化学院,辽宁鞍山 114051
- 3. 中国科学院金属研究所,辽宁沈阳 110016
- 4. 空装驻沈阳地区第三军事代表室,辽宁沈阳 110016
- 5. 沈阳铸造研究所有限公司,辽宁沈阳 110016
- 6. 西北工业大学伦敦玛丽女王工程学院,陕西西安 710072
- 折叠
摘要
为了研究P在超级铁素体不锈钢中的作用,基于S44660钢成分,调整了 P的质量分数,控制P含量分别为0.004％、0.009％、0.033％以及0.055％4种试验钢,研究P含量的变化对铸造S44660超级铁素体不锈钢组织与力学性能的影响.结果表明:在P含量(质量分数)为0.004％、0.009％和0.033％时,P含量增加可以扩大S44660超级铁素体不锈钢的结晶温度范围(AT),减小晶粒尺寸并提升等轴晶率,但当P含量为0.055％时,晶粒尺寸反而增大,等轴晶率下降;适量的P可以提高材料的室温拉伸性能以及硬度;P对材料冲击韧性具有双重作用,一方面P对晶粒有细化作用,进而提升材料的冲击吸收功;另一方面,过量的P会促使其在晶界处偏聚,进而影响材料的韧性.
Abstract
In order to study the role of P in super ferritic stainless steel,based on the composition of S44660 steel,the mass fraction of P was adjusted,and the P content was controlled as 0.004wt％,0.009wt％,0.033wt％and 0.055wt％.The effect of P content change on the microstructure and mechanical properties of cast S44660 super ferritic stainless steel was studied.The results show that P can expand the crystallization temperature range(ΔT),reduce the grain size and increase the equiaxed crystal rate when the P content is 0.009wt％and 0.033wt％.But when the P content is 0.055wt％,the grain size increases and the equiaxed crystal rate decreases.The appropriate amount of P can improve the room temperature tensile properties and hardness of the material.P has a dual effect on the impact toughness of the material.On the one hand,P has a refinement effect on the grain,thereby improving the impact absorption work of the material;on the other hand,excess P will promote its deflection at grain boundaries,which in turn affects the toughness of the material.
关键词
S44660超级铁素体不锈钢/铸造/凝固/力学性能Key words
S44660 super ferritic stainless steel/foundry/solidification/mechanical properties引用本文复制引用
基金项目
辽宁省科技攻关计划(2019JH2/10100009)
出版年
2024
NETL
NSTL
万方数据