选区激光熔化技术制备316L多孔不锈钢工艺及性能研究
发布时间：2018-12-13 17:20
【摘要】：316L不锈钢作为医用人工关节材料,具有价格低廉和综合性能优异的优点,但在生物医学应用方面的推广和应用受到现有制备工艺的制约。采用选区激光熔化技术制备316L多孔不锈钢,分析了其显微组织构成,并对扫描间距对其力学性能的影响开展了研究。研究结果表明,随着扫描间距的增大,相邻两个激光辐照区域的搭接率降低,316L多孔不锈钢的抗压强度及弹性模量均减小;由于激光热作用区的存在,半熔化的颗粒依附于预留孔壁内侧,导致最终实际孔径小于预留孔径。采用选区激光熔化技术制备的316L多孔不锈钢孔隙率为10.67%~30.26%,平均孔径尺寸在40~300μm之间,抗压强度为2 410~3 370MPa,弹性模量为6.0~10.8GPa。316L多孔不锈钢的组织主要为等轴晶并含有少量枝晶,等轴晶晶粒平均尺寸约为850nm,枝晶晶粒的宽度约为800nm。压缩断口形貌观察表明断口由均匀细小的圆形韧窝组成,表明其压缩破坏方式为韧性断裂。
[Abstract]:As a medical artificial joint material, 316L stainless steel has the advantages of low cost and excellent comprehensive performance, but its popularization and application in biomedical application is restricted by the existing preparation technology. 316L porous stainless steel was prepared by selective laser melting technique. The microstructure of 316L porous stainless steel was analyzed, and the effect of scanning distance on its mechanical properties was studied. The results show that with the increase of scanning distance, the lap ratio of two adjacent laser irradiated regions decreases, and the compressive strength and elastic modulus of 316L porous stainless steel decrease. Due to the existence of the laser thermal interaction zone, the semi-melted particles are attached to the inner side of the reserved pore wall, resulting in the final actual pore size being smaller than the reserved pore size. The porosity of 316L porous stainless steel prepared by selective laser melting technique is 10.67 and 30.26, the average pore size is between 40 and 300 渭 m, and the compressive strength is 2 410 ~ 3 370 MPa. The structure of 6.0~10.8GPa.316L porous stainless steel with elastic modulus is mainly equiaxed and contains a small amount of dendrite. The average size of equiaxed grain is about 850 nm and the width of dendrite grain is about 800 nm. The morphology of compression fracture shows that the fracture surface is composed of uniform and fine round dimples, which indicates that the compression failure mode is ductile fracture.
【作者单位】： 苏州大学机电工程学院激光加工中心;苏州大学沙钢钢铁学院;安徽工业大学材料科学与工程学院;
【基金】：国家自然科学基金资助项目(项目编号:51104110) 苏州市科技基础研究计划资助项目(项目编号:SYG201231)
【分类号】：TG665
[Abstract]:As a medical artificial joint material, 316L stainless steel has the advantages of low cost and excellent comprehensive performance, but its popularization and application in biomedical application is restricted by the existing preparation technology. 316L porous stainless steel was prepared by selective laser melting technique. The microstructure of 316L porous stainless steel was analyzed, and the effect of scanning distance on its mechanical properties was studied. The results show that with the increase of scanning distance, the lap ratio of two adjacent laser irradiated regions decreases, and the compressive strength and elastic modulus of 316L porous stainless steel decrease. Due to the existence of the laser thermal interaction zone, the semi-melted particles are attached to the inner side of the reserved pore wall, resulting in the final actual pore size being smaller than the reserved pore size. The porosity of 316L porous stainless steel prepared by selective laser melting technique is 10.67 and 30.26, the average pore size is between 40 and 300 渭 m, and the compressive strength is 2 410 ~ 3 370 MPa. The structure of 6.0~10.8GPa.316L porous stainless steel with elastic modulus is mainly equiaxed and contains a small amount of dendrite. The average size of equiaxed grain is about 850 nm and the width of dendrite grain is about 800 nm. The morphology of compression fracture shows that the fracture surface is composed of uniform and fine round dimples, which indicates that the compression failure mode is ductile fracture.
【作者单位】： 苏州大学机电工程学院激光加工中心;苏州大学沙钢钢铁学院;安徽工业大学材料科学与工程学院;
【基金】：国家自然科学基金资助项目(项目编号:51104110) 苏州市科技基础研究计划资助项目(项目编号:SYG201231)
【分类号】：TG665
【参考文献】
相关期刊论文 前4条
1 林鑫,李延民,王猛,冯莉萍,陈静,,黄卫东;Columnar to equiaxed transition during alloy solidification[J];Science in China(Series E:Technological Sciences);2003年05期
2 王安东,戴起勋;生物医用材料316L不锈钢的磨损腐蚀特性研究[J];金属热处理;2005年03期
3 林鑫;杨海欧;陈静;黄卫东;;激光快速成形过程中316L不锈钢显微组织的演变[J];金属学报;2006年04期
4 王辉;周向阳;李昌林;李R，
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