技术特征:
1.一种负泊松比夹层构件与磁屏蔽层一体成形方法,其特征在于:合金一成分(wt%):44.13~54.68ni,0.05~4.5zr,0.15~1.5cu,0.05~2.47hf,0.045~0.36ta,0.013~3.2pd,0.015~0.43y,0.012~0.26sc,余量为ti;合金二成分(wt%):32.76~38.53ni,0.17~3.3cu,0.005~0.88ti,0.024~0.36nb,0.15~5.66cr,0.01~1.32al,0.0035~0.01c,0.0015la,余量为fe;软磁合金成分(wt%):0.88~11.75mo,0.036~4.77cu,0.036~2.74zr,0.015~1.73co,0.36~5.89cr,8.34~20.16fe,0.32~3.67ti,0.001~0.003c,0.0018la,0.0011ce,余量为ni;一体化成形方法如下:(1)通过slm制造内层负泊松比结构,内层负泊松比结构原料采用合金一或二;采用的激光功率范围为150~500w,扫描速度为600~5000mm/s,扫描间距为0.06~0.15mm,切片层厚0.02~0.06mm;采用旋转扫描方式,每层旋转角度45~90
°
,基板预热温度30~200℃;夹层中填充内凹六边形或星形胞元的负泊松比结构,激光功率范围为100~300w,扫描速度为2000~6000mm/s,扫描间距0.08~0.15mm;内凹六边形直壁长0.5~3mm,斜壁长0.3~2.5mm,壁厚0.15~1.2mm,内角-15~-30
°
;内凹星形单壁长0.5~1.5mm,星形内凹角-15~-35
°
,壁厚0.12~1mm,中心杆长0.25~0.7mm,杆直径0.06~0.28mm,杆头与所处星形四角在同一平面;(2)使用激光熔覆在构件表面制备坡莫合金磁屏蔽涂层,坡莫合金磁屏蔽涂层原料采用软磁合金成分,规划二维扫描路径输入机械手进行外层的熔覆搭接成形;激光功率范围为500~2500w,扫描速度为4~15mm/s,送粉速率10~35g/min,制得坡莫合金涂层厚度0.4~3mm;光斑直径1.0~2.0mm,搭接率30~45%,激光束与加工面法线夹角8~15
°
,氩气保护气流量15~30l/min。
技术总结
一种负泊松比夹层构件与磁屏蔽层一体成形方法,属于激光增材制造领域。本发明创新点在于将功能合金如形状记忆合金、低热膨胀合金,负泊松比特殊结构,磁屏蔽涂层结合一体成形。其中通过选区激光熔化技术,搭配材料体系创新,形成负泊松比结构夹层,构件具有形状记忆、低热膨胀、轻量化、抗冲击、能量吸收等特点。通过激光熔覆技术在构件表面制备冶金结合良好、屏蔽性能优异的低频磁屏蔽涂层。屏蔽性能优异的低频磁屏蔽涂层。屏蔽性能优异的低频磁屏蔽涂层。
技术研发人员:杨胶溪 王泽康 杨锋 熊发林 杜志成 刘文夫 王枭健 李梦阳 杨兴建
受保护的技术使用者:钢铁研究总院有限公司
技术研发日:2022.10.24
技术公布日:2023/1/13