华西口腔医学杂志

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铸造纯钛激光焊接熔焊区的组织结构研究

朱娟芳1, 何惠明2, 刘方3, 张春宝2, 王忠义2   

  1. 1.郑州大学第一附属医院口腔科, 河南郑州450002; 2.第四军医大学口腔医院修复科, 陕西西安710032; 3.河南省平顶山市公安局湛河分局法医门诊, 河南平顶山467000
  • 收稿日期:2006-12-25 修回日期:2006-12-25 出版日期:2006-12-20 发布日期:2006-12-20
  • 通讯作者: 何惠明,Tel:029- 84776126
  • 作者简介: 朱娟芳( 1972-),女,河南人,博士研究生
  • 基金资助:

    陕西省自然科学基金资助项目( 2004C2- 53)

Structur al Char acter istics of Laser - welded Cast Pur e Titanium Joints by Differ ent Gap Distance

ZHU Juan- fang1, HE Hui- ming2, LIU Fang3, ZHANG Chun- bao2, WANG Zhong- yi2   

  1. 1. Dept. of Stomatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450002, China; 2. Dept. of Prosthodontics, College of Stomatology, The Fourth Military Medical University, Xi′an 710032, China; 3. Legal Medical Clinic, Branch Office of Public Security Bureau, Pingdingshan 467000, China
  • Received:2006-12-25 Revised:2006-12-25 Online:2006-12-20 Published:2006-12-20
  • Contact: HE Hui- ming,Tel:029- 84776126

摘要:

目的研究激光焊接铸造纯钛时不同的焊接间距对纯钛组织结构的影响。方法将铸造钛试样按照焊接间距的大小分为4组:0.00 mm、0.25 mm、0.50 mm及1.00 mm组,将每根试样从中间断开,用牙科专用激光焊接机进行焊接。焊接后,肉眼观察焊缝区外观、显微硬度仪上测试焊区的维氏显微硬度,并对焊缝区进行金相学的观察。0.00 mm组为对照组。结果各实验组焊缝区肉眼外观形貌、显微硬度变化无明显差异。随着焊接间距的增大,热影响区增大。热影响区的金相结构均为细小的针状马氏体结构。结论焊接间距不同,焊缝处热影响区的宽度不同,但其组织结构无明显不同。

关键词: 钛, 激光焊接, 组织结构

Abstract:

Objective To measure the microstructure of laser- welded cast pure titanium by different gap distance. Methods Forty specimens were sectioned and welded at four gap(s 0.00 mm, 0.25 mm, 0.50 mm and 1.00 mm). Took microhardness test and metallographic examination of welded zone surface. Results There were no difference in microhardness value and metallographic observation between welded specimens. The width of heat - effected zone was different. The smaller grains and needle- like αmartensitic structure were found in the heat- affected zone. Conclusion The effects of the joint gap were not significant.

Key words: titanium, laser- welding, structure