發(fā)布時(shí)間：2018-11-09 10:56

【摘要】：3D打印技術(shù)改變了以往金屬加工技術(shù)的理念,變減材制造為增材制造,這樣不僅節(jié)省材料,還可以提高產(chǎn)品的精度。將3D打印技術(shù)應(yīng)用于牙種植體的制造當(dāng)中,可以根據(jù)患者的個(gè)性化要求進(jìn)行生產(chǎn),減少病人的牙槽骨損失量、縮短治療周期、減輕病人無(wú)牙期間的不便。目前中國(guó)市場(chǎng)牙種植體主要依靠進(jìn)口,價(jià)格昂貴、尺寸統(tǒng)一。我國(guó)牙齒缺失患者已經(jīng)超過(guò)3億人,可見(jiàn)中國(guó)牙種植體市場(chǎng)龐大,因此,實(shí)現(xiàn)3D打印牙種植體具有重要意義。為了探究3D打印牙種植體的可行性,本文研究了意大利和瑞士牙植體的生產(chǎn)工藝以及各項(xiàng)性能指標(biāo),為3D打印牙種植體力學(xué)性能提供依據(jù),同時(shí)也為國(guó)產(chǎn)化牙種植體提供理論技術(shù)指導(dǎo);其次利用3D打印技術(shù)打印了鈦合金試件,并對(duì)試件的組織、硬度、強(qiáng)度和延伸率進(jìn)行了測(cè)試,為實(shí)現(xiàn)3D打印牙種植體提供理論指導(dǎo)。本文的主要研究?jī)?nèi)容如下:(1)剖析兩款進(jìn)口牙種植體:確定其幾何構(gòu)造、成分、組織、硬度,研究其加工工藝。(2)采用粉末粒徑15~45μm的Ti_6Al_4V粉末,進(jìn)行3D打印,研究3D打印不同激光功率、掃描速度和鋪粉厚度分別對(duì)試件的組織、硬度、強(qiáng)度和延伸率的影響。(3)研究退火工藝下不同溫度對(duì)3D打印試件的組織、硬度和強(qiáng)度的影響。結(jié)果:在實(shí)驗(yàn)范圍內(nèi),得到型號(hào)為L(zhǎng)M120的3D打印機(jī)最佳工藝參數(shù)為激光功率400W、掃描速度100mm/s、鋪粉厚度30μm;最佳退火工藝為750℃保溫25min,空冷。其組織為網(wǎng)籃狀,硬度428HV、抗壓強(qiáng)度1455MPa。
[Abstract]:The 3D printing technology has changed the idea of metal processing technology in the past, and changed the material manufacturing into the increasing material manufacture, which not only saves the material, but also improves the precision of the product. The 3D printing technology can be used to produce dental implants according to the individual requirements of the patients, reduce the amount of alveolar bone loss, shorten the treatment period, and reduce the inconvenience of the patients during the toothless period. At present, dental implants in China mainly rely on imports, expensive, uniform size. There are more than 300 million patients with dental defects in China, which shows that the market of dental implants in China is huge, so it is of great significance to realize 3D printing dental implants. In order to explore the feasibility of 3D printing dental implants, this paper studied the production technology and various performance indexes of Italian and Swiss dental implants, which provided the basis for the physical properties of 3D printed dental implants. At the same time, it also provides theoretical and technical guidance for home-made dental implants. Secondly, the titanium alloy specimen was printed by 3D printing technology, and the microstructure, hardness, strength and elongation of the specimen were tested, which provided theoretical guidance for the realization of 3D printing dental implants. The main contents of this paper are as follows: (1) analyze two kinds of imported dental implants: determine their geometric structure, composition, microstructure, hardness, study the processing technology. (2) use 1545 渭 m Ti_6Al_4V powder to print 3D. The effects of laser power, scanning speed and coating thickness on the microstructure, hardness, strength and elongation of 3D printed specimens were studied. (3) the effects of different temperatures on the microstructure, hardness and strength of 3D printed specimens were studied. Results: in the range of experiment, the optimum parameters of 3D printer for LM120 were laser power 400W, scanning speed 100mm / s, coating thickness 30 渭 m, and the optimum annealing technology was 750 鈩，

本文編號(hào)：2320194