中国组织工程研究

中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (42): 7396-7401.doi: 10.3969/j.issn.2095-4344.2013.42.009

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

反复熔铸影响新旧钴铬烤瓷合金的机械性能

肖  月1，任丹丹2，王  丹3   

  1. 佳木斯大学附属第二医院，1口腔修复一科，3口腔疾病预防中心，黑龙江省佳木斯市  154007；2佳木斯大学研究生学院，黑龙江省佳木斯市  154007
  • 收稿日期:2013-02-04 修回日期:2013-03-10 出版日期:2013-10-15 发布日期:2013-10-31
  • 通讯作者: 王丹，副主任护师，佳木斯大学附属口腔医院，黑龙江省佳木斯市 154007 qingqinghaizz@126.com
  • 作者简介:肖 月，男，1962年生，吉林省永吉市人，汉族，1985年佳木斯医学院毕业，主任医师，教授，主要从事口腔修复学研究。 987442898@qq.com

Mechanical properties of cobalt-chromium alloys containing different proportion of once-used alloys after recasts

Xiao Yue1, Ren Dan-dan2, Wang Dan3   

  1. 1Department of Prosthodontics, Second Affiliated Hospital of Jiamusi University, Jiamusi  154007, Heilongjiang Province, China
    2School of Graduate, Jiamusi University, Jiamusi  154007, Heilongjiang Province, China
    3Oral Disease Prevention Center, Second Affiliated Hospital of Jiamusi University, Jiamusi  154007, Heilongjiang Province, China
  • Received:2013-02-04 Revised:2013-03-10 Online:2013-10-15 Published:2013-10-31
  • Contact: Wang Dan, Associate chief nurse, Oral Disease Prevention Center, Second Affiliated Hospital of Jiamusi University, Jiamusi 154007, Heilongjiang Province, China qingqinghaizz@126.com
  • About author:Xiao Yue, Chief physician, Professor, Department of Prosthodontics, Second Affiliated Hospital of Jiamusi University, Jiamusi 154007, Heilongjiang Province, China 987442898@qq.com

PDF

490

被引次数

2

摘要：

背景：目前关于反复铸造后钴铬烤瓷合金机械性能改变的研究已有较多研究报道，而对于将回收旧料再利用于新料中后再铸造钴铬烤瓷合金机械性能的研究则少有报道。
目的：研究反复熔铸对不同比例新旧钴铬烤瓷合金拉伸强度、屈服强度、延伸率及显微硬度等机械性能的影响。
方法：由新钴铬烤瓷合金熔铸成Ⅰ代铸件，40%Ⅰ代废旧料添加60%新钴铬烤瓷合金熔铸成Ⅱ代铸件，40%Ⅱ代废旧料添加60%新钴铬烤瓷合金熔铸成Ⅲ代铸件，40%Ⅲ代废旧料添加60%新钴铬烤瓷合金熔铸成第Ⅳ代铸件。采用拉伸实验测试各代试件的拉伸强度、0.2%屈服强度、延伸率；采用弯曲实验测试各代试件的弯曲强度；采用硬度实验测试各代试件的维氏硬度值；并进行显微金相观察。
结果与结论：Ⅱ，Ⅲ，Ⅳ代铸件拉伸强度、0.2%屈服强度、延伸率、弯曲强度及维氏硬度值与Ⅰ代铸件比较，差异均无显著性意义。Ⅰ代试样晶粒的大小均匀一致，直径较小，沿晶界分布的碳化物大小也较均匀细小，主要呈球形和不规则的蠕虫状两种形态；Ⅱ代和Ⅲ代试样组织形态尚均匀，只是晶粒有些粗化；Ⅳ代试样显微组织中的碳化物开始粗化，不规则蠕虫状的碳化物含量增多，可发现晶粒内存在少量非金属夹杂物。表明新旧比例为3∶2的钴铬烤瓷合金至少可以反复熔铸3次而不引起机械性能下降。

关键词: 生物材料, 组织工程口腔材料, 钴铬烤瓷合金, 不同比例, 反复熔铸, 机械性能, 显微金相观察

Abstract:

BACKGROUND: There are numerous studies about mechanical changes of recast cobalt-chromium ceramic alloys. However, little is reported on the mechanical properties of cobalt-chromium ceramic alloys containing once-used alloys after recasts.
OBJECTIVE: To study the effects of different proportion of once-used alloys to recasting cobalt-chromium alloys on their mechanical properties, including tensile strength, yield strength, elongation and hardness.
METHODS: Cobalt-chromium alloys cast samples were prepared and recast for three times (40% once-used alloys were added per time). The tensile strength, 0.2% yield strength, percentage of elongation, flexural strength and Vickers hardness of each specimen were measured. In addition, microscopic metallographic observation was done.
RESULTS AND CONCLUSION: Being recast for three times, cobalt-chromiun alloys showed no significant differences on their tensile strength, 0.2% yield strength, percentage of elongation, flexural strength and Vickers hardness. GenerationⅠalloy samples had uniform size, small diameter and small carbide size distributing along the grain boundary, mainly exhibiting spherical and irregular wormlike forms. Generations Ⅱ and Ⅲ samples were uniform in shape, but crystal grains were coarsened a little. Carbide from Generation IV samples began to be coarsened, irregular wormlike carbides were increased in amount, and a few of non-metallic inclusions could be found in grains. Cobalt-chromium alloys can be recast after addition of 40% once-used alloys for three times at least in air environment, without decrease of the mechanical properties.

Key words: biocompatible materials, metal ceramic alloys, tensile strength, hardness tests

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