热传导模式对电弧增材制造800 MPa级船用高强钢组织与性能的影响
Effect of heat conduction mode on microstructure and properties of 800 MPa class marine high strength steel fabricated by wire arc additive manufacturing
郑文健 1李正阳 2王杏华 3宫旭辉 3闫德俊 4赖少波 4杨建国2
作者信息
- 1. 浙江工业大学,机械工程学院,杭州,310023;中船黄埔文冲船舶有限公司,广东省舰船先进焊接技术企业重点实验室,广州,510715
- 2. 浙江工业大学,机械工程学院,杭州,310023
- 3. 中国船舶重工集团公司第七二五研究所,洛阳,471023
- 4. 中船黄埔文冲船舶有限公司,广东省舰船先进焊接技术企业重点实验室,广州,510715
- 折叠
摘要
为了研究热传导模式对 800 MPa级船用高强钢增材构件组织与性能的影响,采用电弧增材制造技术在不同工艺下沉积了 800 MPa级船用高强钢构件,并对其进行微观组织表征和力学性能测试.沿高度方向沉积时,构件底部主要为针状铁素体和马氏体组织,中部和顶部为块状和针状铁素体+粒状贝氏体组织,水平和竖直方向的屈服强度分别为 708 MPa和 652 MPa,抗拉强度分别为 895 MPa和 831 MPa,-60℃冲击吸收能量分别为 66 J和 86 J;沿横向沉积时,构件的显微组织为细小的针状铁素体和板条状马氏体,屈服强度和抗拉强度分别达到 929 MPa和 1020 MPa,-60℃冲击吸收能量为 92 J,结果表明,800 MPa级船用高强钢增材构件的力学性能对热传导模式的敏感性较高,优化热传导模式可以明显提升其综合力学性能.
Abstract
In order to study the effect of heat conduction mode on the microstructure and properties of 800 MPa class marine high strength steel additive components,800 MPa class marine high strength steel components were deposited by wire arc additive manufacturing(WAAM)technology under different processes,and microstructure characterization and mechanical properties testing of components were carried out.When deposited along the height direction,the bottom microstructure of the component is mainly acicular ferrite and martensite,the middle and top microstructures are massive and acicular ferrite+granular bainite.The yield strengths in the horizontal and vertical directions are 708 MPa and 652 MPa,the tensile strength are 895 MPa and 831 MPa,and the impact absorbed energy at-60℃is 66 J and 86 J,respectively.When deposited along the transverse direction,the microstructure of the component is fine acicular ferrite and lath martensite,the yield strength and tensile strength reach 929 MPa and 1020 MPa respectively,and the impact absorbed energy at-60℃is 92 J.The results indicate that the mechanical properties of the 800 MPa class marine high strength steel WAAM component are highly sensitive to the heat conduction mode,and optimizing heat conduction process can significantly improve its comprehensive mechanical properties.
关键词
电弧增材制造/船用高强钢/微观组织特征/力学性能Key words
wire arc additive manufacturing/marine high strength steel/microstructure characteristic/mechanical property引用本文复制引用
出版年
2024
NETL
NSTL
万方数据