文章信息/Info

Title:

The Microstructure of the Co�睠r Alloys Fabricated by a Selective Laser Melting Technique

作者:

王兵; 宋昕; 彭練; 佟岱

（1. 北京大學口腔醫(yī)學院·口腔醫(yī)院，義齒加工中心 口腔數(shù)字化醫(yī)療技術(shù)和材料國家工程實驗室口腔數(shù)字醫(yī)學北京市重點實驗室，北京 100081） （2. 中國科學院過程工程研究所，北京 100190）

Author(s):

WANG Bing;  SONG Xin;  PENG Lian;  TONG Dai

（1. Dental Laboratory, Peking University School and Hospital of Stomatology & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology，Beijing 100081， China） （2. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China）

關(guān)鍵詞:

選擇性激光燒結(jié); 鑄造; 鈷鉻合金; 微觀結(jié)構(gòu); 齒科修復

Keywords:

SLM;  cast;  Co�睠r alloy;  microstructure;  dental restoration

DOI:

10.7502/j.issn.1674-3962.2017.07.14

文獻標志碼:

A

摘要:

對比選擇性激光燒結(jié)工藝(SLM)和鑄造工藝(cast)制備的Co�睠r合金的內(nèi)部微觀結(jié)構(gòu)，分析產(chǎn)生不同微觀結(jié)構(gòu)的原因，并分析不同微觀結(jié)構(gòu)對Co�睠r合金性能可能造成的影響。選取組成接近的Co�睠r合金金屬粉末和金屬塊，分別通過SLM工藝和cast工藝制作Co�睠r合金試樣。利用場發(fā)射掃描電鏡(SEM)觀察樣品內(nèi)部的微觀結(jié)構(gòu)并采用X射線能譜(EDX)分析樣品特征區(qū)域的化學成分。SLM工藝制備的樣品的內(nèi)部結(jié)構(gòu)均勻，沒有出現(xiàn)分相區(qū)，而離心cast工藝和真空cast工藝制備的樣品內(nèi)部均出現(xiàn)富含Mo元素的分相區(qū)。SLM工藝和cast工藝制備的樣品的孔洞均較少。對于Co�睠r合金而言，SLM工藝的加工質(zhì)量優(yōu)于cast工藝。

Abstract:

The microstructure difference of the Co�睠r alloys fabricated by a cast technique and a SLM (selective laser melting) technique is investigated, and the reasons causing the different microstructures and the effects of the different microstructures on the properties of the Co�睠r alloys are discussed. The Co�睠r alloy powder and bulk with similar compositions are selected to prepare Co�睠r samples using the SLM technique and the cast technique, respectively. The microstructures of the fabricated Co�睠r samples are investigated by SEM and the chemical compositions of featured areas are analyzed by EDX. The microstructure of the Co�睠r alloy fabricated by the SLM technique is uniform without phase separation. However, the phase separation rich in Mo element is found in the Co�睠r alloys fabricated by both the centrifugal cast technique and the vacuum cast technique. The Co�睠r samples fabricated by the SLM technique and the cast technique both contain less pores. In conclusion, the quality of the Co�睠r alloy fabricated by the SLM technique is better than the cast technique.