期刊论文

Microstructure and Properties of Fe-based Laser Cladding with Different Ni Content

中文

表面技术

1001-3660

2017

46

6

221-225

10.16490/j.cnki.issn.1001-3660.2017.06.035

国家自然科学基金项目（51474130）； 湖南省市联合基金重点项目（13JJ8013）； 湖南省高校重点实验室项目（湘财教指[2014]85号）； 湖南省重点学科建设项目（湘教发[2011]76号）； 湖南省高校科技创新团队支持计划（湘教通[2012]318号）~~；

本校为第一机构

目的研究不同Ni含量铁基激光熔覆层的组织和性能。方法采用CO_2激光器制备了不同Ni含量的铁基激光熔覆层,通过奥林巴斯光学显微镜、场发射扫描电镜、X射线衍射仪及洛氏硬度计等设备,对激光熔覆层物相、微观组织及力学性能进行表征。结果当Ni含量为10%~11%时,熔覆层物相主要由γ-Fe相组成,含有少量α-Fe相,洛氏硬度为35.1HRC,熔覆层残余应力宏观上表现为拉应力。当Ni含量为6%~7%时,熔覆层物相主要由α-Fe相组成,含有少量γ-Fe相,洛氏硬度为47.9HRC,熔覆层残余应力宏观上接近平衡状态。当Ni含量为2%~3%时,熔覆层主要由α-Fe相组成,洛氏硬度为60.3HRC,熔覆层残余应力宏观上表现为压应力。结论不同N...

The work aims to study microstructure and properties of Fe-based laser cladding with different Ni content. Fe-based laser cladding with different Ni content was prepared with CO2 laser. Phase, microstructure and mechanical properties of the laser cladding layer were characterized with Olympus optical microscope, field emission scanning electron microscope, X-ray diffractometer and Rockwell apparatus. When the Ni content was 10%-11%, phase of cladding layer was mainly com- posed of a-Fe phase, and also contained a little y-Fe phase, Rockwell har...