中国激光医学杂志
中國激光醫學雜誌
중국격광의학잡지
980235.htm
2009年
5期
273-278
,共6页
钛合金%电脑辅助设计/电脑辅助制造(CAD/CAM)%激光近形制造%力学性能
鈦閤金%電腦輔助設計/電腦輔助製造(CAD/CAM)%激光近形製造%力學性能
태합금%전뇌보조설계/전뇌보조제조(CAD/CAM)%격광근형제조%역학성능
Titanium alloy%Computer-aided design/compter-aided manufecturing (CAD/CAM)%Laser engineered net shaping%Mechanical properties
目的 比较激光近形制造技术和铸造技术制作的钛合金试件的材料性能,探索激光快速成形此新工艺在口腔修复领域中的应用.方法 以-200～325目气雾化法制备的球形钛合金粉末为原料,应用激光近形制造技术制作钛合金试件,测试其在拉伸试验中的抗拉强度、屈服强度,三点弯曲试验中的弯曲弹性模量、抗弯强度,以及维氏显微硬度,并与铸造技术制作的钛合金试件进行对比;观察两种不同加工方法制作的钛合金试件的组织结构,以及拉伸断口的微观形貌特征.结果 激光近形制造技术制作钛合金试件,成形速度快,成形件无缺陷,其抗拉强度、屈服强度、弯曲弹性模量、抗弯强度、维氏显微硬度分别为(1 056.92±61.69)N/mm~2、(62.65±61.91)N/mm~2、(133 722.62±3 618.18)MPa、(2 313.42±129.16)MPa、376.24±14.88.激光近形制造试件的抗拉强度、屈服强度显著高于铸造钛合金试件.金相显微镜显示激光近形制造钛合金试件的组织为针状细枝晶的微晶结构,拉伸断口呈现均匀细致的韧窝形貌,发生韧性断裂.结论 激光近形制造技术可以满足口腔修复的加工要求,但需要进一步研究其成形性能及提高精度.
目的 比較激光近形製造技術和鑄造技術製作的鈦閤金試件的材料性能,探索激光快速成形此新工藝在口腔脩複領域中的應用.方法 以-200～325目氣霧化法製備的毬形鈦閤金粉末為原料,應用激光近形製造技術製作鈦閤金試件,測試其在拉伸試驗中的抗拉彊度、屈服彊度,三點彎麯試驗中的彎麯彈性模量、抗彎彊度,以及維氏顯微硬度,併與鑄造技術製作的鈦閤金試件進行對比;觀察兩種不同加工方法製作的鈦閤金試件的組織結構,以及拉伸斷口的微觀形貌特徵.結果 激光近形製造技術製作鈦閤金試件,成形速度快,成形件無缺陷,其抗拉彊度、屈服彊度、彎麯彈性模量、抗彎彊度、維氏顯微硬度分彆為(1 056.92±61.69)N/mm~2、(62.65±61.91)N/mm~2、(133 722.62±3 618.18)MPa、(2 313.42±129.16)MPa、376.24±14.88.激光近形製造試件的抗拉彊度、屈服彊度顯著高于鑄造鈦閤金試件.金相顯微鏡顯示激光近形製造鈦閤金試件的組織為針狀細枝晶的微晶結構,拉伸斷口呈現均勻細緻的韌窩形貌,髮生韌性斷裂.結論 激光近形製造技術可以滿足口腔脩複的加工要求,但需要進一步研究其成形性能及提高精度.
목적 비교격광근형제조기술화주조기술제작적태합금시건적재료성능,탐색격광쾌속성형차신공예재구강수복영역중적응용.방법 이-200～325목기무화법제비적구형태합금분말위원료,응용격광근형제조기술제작태합금시건,측시기재랍신시험중적항랍강도、굴복강도,삼점만곡시험중적만곡탄성모량、항만강도,이급유씨현미경도,병여주조기술제작적태합금시건진행대비;관찰량충불동가공방법제작적태합금시건적조직결구,이급랍신단구적미관형모특정.결과 격광근형제조기술제작태합금시건,성형속도쾌,성형건무결함,기항랍강도、굴복강도、만곡탄성모량、항만강도、유씨현미경도분별위(1 056.92±61.69)N/mm~2、(62.65±61.91)N/mm~2、(133 722.62±3 618.18)MPa、(2 313.42±129.16)MPa、376.24±14.88.격광근형제조시건적항랍강도、굴복강도현저고우주조태합금시건.금상현미경현시격광근형제조태합금시건적조직위침상세지정적미정결구,랍신단구정현균균세치적인와형모,발생인성단렬.결론 격광근형제조기술가이만족구강수복적가공요구,단수요진일보연구기성형성능급제고정도.
To compare the properties of titanium alloy specimens fabricated by laser engineered net shaping (LENS) and casting,and to probe the new method of laser rapid forming in prosthodontics field.
Methods The titanium alloy specimens were fabricated from gas-atomised spherical titanium alloy powder sized from 200 to 325 mesh by LENS technology. The tensile strength and yield strength in tensile testing, the flexibal module and anti-bend strength in three point bending testing, and the micro-vickers hardness of the titaoium alloy specimens were measured and compared with those of other specimens made by wax-lost casting. The microstructures and natural fracture surface of the titanium alloy specimens made by two different process were observed.
Results The titanium alloy specimens could be obtained by the method of LENS technology, which had a rapid shaping speed, and had no defect. The tensile strength, yield strength, flexibal module, anti-bend strength and the micro-vickers hardness of the titanium alloy specimens were about (1 056. 92±61.69) N/mm~2, (62. 65±61.91) N/ram~2,(133 722. 62±3618.18) MPA, (2 313. 42± 129. 16) MPA, and 376. 24 ?14. 88. The tensile strength and yield strength of the titanium alloy made by laser engineered net shaping were much better than those made by casting. The optical microscopy showed that the microstructure of the titanium alloy specimens fabricated by LENS was a dense and acircular structure distributed uniform at all field. The tensile fractured surface of the titanium alloy specimens fabricated by LENS appeared to be a mass of even dimple, and the fracture mechanism belonged to ductile fracture. Conclusions The LENS technology is satisfied for the prosthodontics completely,yet the further study on the forming properties and on the better forming precision will carry out.
