【摘要】：316L不銹鋼作為醫(yī)用人工關(guān)節(jié)材料,具有價格低廉和綜合性能優(yōu)異的優(yōu)點,但在生物醫(yī)學(xué)應(yīng)用方面的推廣和應(yīng)用受到現(xiàn)有制備工藝的制約。采用選區(qū)激光熔化技術(shù)制備316L多孔不銹鋼,分析了其顯微組織構(gòu)成,并對掃描間距對其力學(xué)性能的影響開展了研究。研究結(jié)果表明,隨著掃描間距的增大,相鄰兩個激光輻照區(qū)域的搭接率降低,316L多孔不銹鋼的抗壓強度及彈性模量均減小;由于激光熱作用區(qū)的存在,半熔化的顆粒依附于預(yù)留孔壁內(nèi)側(cè),導(dǎo)致最終實際孔徑小于預(yù)留孔徑。采用選區(qū)激光熔化技術(shù)制備的316L多孔不銹鋼孔隙率為10.67%~30.26%,平均孔徑尺寸在40~300μm之間,抗壓強度為2 410~3 370MPa,彈性模量為6.0~10.8GPa。316L多孔不銹鋼的組織主要為等軸晶并含有少量枝晶,等軸晶晶粒平均尺寸約為850nm,枝晶晶粒的寬度約為800nm。壓縮斷口形貌觀察表明斷口由均勻細(xì)小的圓形韌窩組成,表明其壓縮破壞方式為韌性斷裂。
[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.
【作者單位】： 蘇州大學(xué)機電工程學(xué)院激光加工中心;蘇州大學(xué)沙鋼鋼鐵學(xué)院;安徽工業(yè)大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(項目編號:51104110) 蘇州市科技基礎(chǔ)研究計劃資助項目(項目編號:SYG201231)
【分類號】：TG665

【參考文獻】

相關(guān)期刊論文 前4條

1 林鑫,李延民,王猛,馮莉萍,陳靜,,黃衛(wèi)東;Columnar to equiaxed transition during alloy solidification[J];Science in China(Series E:Technological Sciences);2003年05期

2 王安東,戴起勛;生物醫(yī)用材料316L不銹鋼的磨損腐蝕特性研究[J];金屬熱處理;2005年03期

3 林鑫;楊海歐;陳靜;黃衛(wèi)東;;激光快速成形過程中316L不銹鋼顯微組織的演變[J];金屬學(xué)報;2006年04期

4 王輝;周向陽;李昌林;李R，

本文編號：2376915