Sm(CoFeCuZr)z合金表面纳米晶涂覆和激光辅助协同增韧技术及其机制

Rare earth SmCo permanent magnet with good thermal stability, corrosion resistance and oxidation resistance, especially for strong thermal shock and low eddy current loss in magnetic motor, is irreplaceable position in the nuclear industry, national defense and aerospace etc.. But there are two major technical problems for the magnets to be a breakthrough: the low conversion rate of electromagnetic((BH)max<32MOGe) and poor machinability. The aim of this project is to improve the safetyand reliability of the motor of the new energy vehicle, and to solve the problem of high magnetic properties and high toughness of the rare earth permanent magnet in the harsh environment. Based on the traditional laser technology, the mechanical and magnetic properties of rare earth Sm(CoFeCuZr)z alloy have been improved by nanocrystalline surface coating and laser technology. The development of high energy product Sm(CoFeCuZr)z prepared by the cell wall structure design, the coordination technology of alloy matrix and nanocrystalline coating for Sm(CoFeCuZr)Z alloy by laser technology, and the enhanced toughen technology and its mechanism have been studied. These study for SmCo permanent magnet with nanocrystalline coating prepared by Laser assisting method, will provide scientific support for the security service and manufacturing level to promote China new energy power, nuclear industry and military defense and other key magnetic devices.

稀土Sm(CoFeCuZr)z永磁体凭借良好热稳定性、耐腐蚀和抗氧化性等，尤其作为电机磁瓦具有耐冷热冲击好和涡流损耗小优点，在核工业、国防和航天等领域不可取代地位。但目前该磁体存在两大技术难题，即电磁转化率低（磁能积≤32MOGe）和机械加工性差。本项目以新能源汽车轮毂机电的安全性和可靠性为目标，研究在极端环境下轮毂电机中SmCo磁体的磁性和韧性，基于传统激光技术提升，提出了Sm(CoFeCuZr)z系合金表面纳米晶涂层及激光辅助加热增韧技术，具体包括高磁性能Sm(CoFeCuZr)z合金微结构的胞壁结构设计、激光辅助纳米晶涂层增韧Sm(CoFeCuZr)z系合金的调控技术、激光加热-纳米晶渗透-结构-性能协同作用机制，获得高磁能积和强韧性钐钴永磁体的“双高”关键制备技术，为促进我国新能源动力、核工业及国防等领域磁性器件的安全性及制造水平提升提供科学依据。

稀土Sm(CoFeCuZr)z永磁体凭借良好热稳定性、耐腐蚀和抗氧化性等，尤其作为电机磁瓦具有耐冷热冲击好和涡流损耗小优点，在核工业、国防和航天等领域不可取代地位。但目前该磁体存在两大技术难题，即电磁转化率低（磁能积≤32MOGe）和机械加工性差。本项目以新能源汽车轮毂机电的安全性和可靠性为目标，研究在极端环境下轮毂电机中SmCo磁体的磁性和韧性，基于传统激光技术提升，提出了Sm(CoFeCuZr)z系合金表面纳米晶涂层及激光辅助加热增韧技术，具体包括高磁性能Sm(CoFeCuZr)z合金微结构的胞壁结构设计、激光辅助纳米晶涂层增韧Sm(CoFeCuZr)z系合金的调控技术、激光加热-纳米晶渗透-结构-性能协同作用机制，获得高磁能积和强韧性钐钴永磁体的“双高”关键制备技术，为促进我国新能源动力、核工业及国防等领域磁性器件的安全性及制造水平提升提供科学依据。