口腔医学研究

口腔医学研究 ›› 2016, Vol. 32 ›› Issue (7): 689-691.DOI: 10.13701/j.cnki.kqyxyj.2016.07.006

• 基础研究论著 • 上一篇    下一篇

激光焊接不同间距钴铬合金焊件疲劳强度的研究

徐敏锐1, 潘在兴1*, 吴松全2, 陈枫1   

  1. 1. 福建省卫生职业技术学院附属福建省级机关医院口腔科 福建 福州 350003;
    2. 中国科学院福建物质结构研究所 福建 福州 350001
  • 收稿日期:2015-11-23 出版日期:2016-07-26 发布日期:2016-07-25
  • 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:
    福建省科技计划项目(编号:2011Y0011)

Study on the Fatigue Life of Laser-welded Co-Cr Alloy Joints with Different Gap Distances.

XU Min-rui1*, PAN Zai-xing1, WU Song-quan2, CHEN Feng1   

  1. 1. Affiliated Institution to Fujian Provincial Hospital, Fuzhou 350003, China;
    2. Fujian Research Institute on the Structure of Matter, Fuzhou 350001, China
  • Received:2015-11-23 Online:2016-07-26 Published:2016-07-25

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摘要： 目的: 探讨不同焊接间距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: 将牙科钴铬合金铸件采用激光焊接法分别在0.00 mm、0.25 mm、0.50 mm 3种焊接间距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和疲劳强度均小于未焊接组(P<0.05),3个焊接组的最大压应力值差别无显著性;在焊接组中0.25 mm组具有最佳的疲劳强(P<0.05),0.00 mm组和0.50 mm的差异无显著性。结论: 激光焊接焊件之间保留一定间隙有助于提高钴铬合金焊件的疲劳强度,焊接间隙在0.25 mm左右为宜。

关键词: 激光焊接, 钴铬合金, 疲劳强度

Abstract: Objective: To investigate the influence of welding gap distances on the mechanical properties and fatigue life of Co-Cr alloy laser-welded joints. Methods: Dumbbell rods made of Co-Cr alloy were laser-welded with the gap distances of 0.00mm, 0.25mm and 0.50mm respectively (n=10). The non-weld group was chosen as control group. All specimens were subjected to three-point bending test on the material testing machine. The maximum compressive stress values and fatigue life were recorded automatically. The fracture of specimen was tested with microscopic phase analysis. Results: The maximum compressive stress values and fatigue life of laser-welded groups were smaller than the non-weld group (P<0.05). No statistically significant difference of the maximum compressive stress values was found within the laser-welded groups. The longest fatigue life was found in the 0.25mm group (P<0.05), and no statistically significant difference was found between 0.00mm group and 0.50mm group. Conclusion: Proper gap distance (0.25mm) is good for enhancing the fatigue life of Co-Cr alloy laser-welded joints.

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

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