口腔医学研究

口腔医学研究 ›› 2015, Vol. 31 ›› Issue (4): 340-342.

• 基础研究论著 • 上一篇    下一篇

不同输出电压对激光焊接钴铬合金焊件疲劳强度的影响

徐敏锐1, 潘在兴1*, 吴松全2, 陈枫1   

  1. 1. 福建省级机关医院口腔科 福建 福州 350001;
    2. 中国科学院福建物质结构研究所
  • 收稿日期:2014-08-14 出版日期:2015-04-28 发布日期:2016-04-29
  • 通讯作者: 潘在兴,电话:0591-87850065
  • 作者简介:徐敏锐(1981~ ),男,福建人,主治医师,硕士,主要从事口腔修复临床工作及口腔材料方面的研究。
  • 基金资助:
    福建省卫生厅青年科研基金(编号:2011-1-26);福建省科技计划项目(编号:2011Y0011)

Effect of Different Laser Output Voltages on the Fatigue Life of Co-Cr Laser-welded Joints.

XU Min-rui, PAN Zai-xing, WU Song-quan, et al   

  1. Affiliated Institution to Fujian Provincial Hospital, Fuzhou 350001
  • Received:2014-08-14 Online:2015-04-28 Published:2016-04-29

被引次数

3

摘要： 目的:探讨不同输出电压对激光焊接钴铬合金试件机械强度和疲劳强度的影响。方法:将牙科钴铬合金采用激光焊接在分别在220 V、250 V、280 V三种输出电压下焊接成哑铃形试件(n=10),以未焊接组作为对照,在材料测试机上进行三点弯曲试验,记录试件的最大压应力值和疲劳强度,并对断口进行显微晶相分析。结果:各焊接组的最大压应力值均小于未焊接组,其中220 V组最小,250 V组与280 V组的差别无显著性;各焊接组的疲劳强度随着输出电压的升高而升高,差异有显著性,但各焊接组的疲劳强度均远小于未焊接组。结论:在一定范围内,激光焊接的疲劳强度随输出电压的升高而增大。

关键词: 激光焊接, 输出电压, 钴铬合金, 疲劳强度

Abstract: Objective: To investigate the effect of different laser output voltages on the mechanical properties and the fatigue life of Co-Cr laser-welded joints. Methods: Dumbbell rods made of Co-Cr alloy were laser-welded in the output voltage of 220V, 250V and 280V, respectively (n=10). The non-weld group was chosen as control group. All groups were subjected to three-point bending test on the material testing machine, the maximum compressive stress values and fatigue life of specimen were record automatically. The fracture of specimen were subjected to Microscopic phase analysis. Results: The maximum compressive stress values of laser-welded groups were smaller than the non-weld group. The smallest values was found in the 220V group, and no statistically significant difference was found between 250V group and 280V group. The fatigue life of laser-welded groups increased along with the raises of output voltage, differences were statistically significant. The fatigue life of laser-welded groups were far shorter than non-weld group. Conclusion: The fatigue life of laser-welded joints increases along with the raises of output voltages within limits.

Key words: Laser-welding , Output voltage, Cobalt-chromium alloy, Fatigue life

中图分类号: