华西口腔医学杂志

• 基础研究 • 上一篇    下一篇

牙用烤瓷支架钴铬钼合金的研制及机械性能的测试

巢永烈1,刘长虹2,李 宁3,杨晓喻4   

  1. 1.四川大学华西口腔医院 口腔修复科,四川 成都610041; 2.青岛大学医学院附属医院 口腔修复科,山东 青岛266003; 3.四川大学制造科学与工程学院 材料成型及控制工程系,四川 成都610041; 4.广东省口腔医院 口腔修复科,广东 广州510280
  • 收稿日期:2005-02-25 修回日期:2005-02-25 出版日期:2005-02-20 发布日期:2005-02-20
  • 通讯作者: 巢永烈, Tel: 028-85503570
  • 作者简介:巢永烈(1943-),男,四川人,教授,博士生导师,硕士
  • 基金资助:

    高等学校博士学科点专项科研基金资助项目 (20020610066)

The Design of Co-Cr-Mo Alloy Combining the Framework with Porcelain Fused to Metal Restorations and Determination of the Mechanical Properties

CHAO Yong-lie1,LIUChang-hong2,LINing3,YANGXiao-yu4   

  1. 1.Dept.ofProsthodontics, West China College ofStomatology,Sichuan University,Chengdu610041,China; 2.Dept.ofProsthodontics,The Affiliated Hospital,College ofMedicine,Qingdao University,Qingdao266003,China; 3.Dept.ofMaterial Molding and Control Engi- neering,College ofManufacturing Science and Engineering,Sichuan University,Chengdu610041,China;4.Dept.ofProsth- odontics,StomatologicalHospital ofGuangdong Province,Guangzhou510280,China
  • Received:2005-02-25 Revised:2005-02-25 Online:2005-02-20 Published:2005-02-20

摘要:

目的 研究一种能同时用于烤瓷修复和可摘局部义齿铸造支架的新型钴铬钼合金。方法 设计合金的多元配方,使用真空感应电炉熔炼合金。通过机械性能测试、硬度测试、密度及熔点范围测试、铸造性能测试、显微结构观察及X射线衍射分析进行筛选。结果 ①合金的成份为Co 54%~67%、Cr 21%~26%、Mo 5%~8%、W5% ~8%、Si 1%~3%、Mn 0·1%~0·25%、其他微量元素。②合金的屈服强度为584 MPa;抗拉强度为736 MPa;延伸率为15·0%;维氏硬度为322 HV;铸流率为100%。结论 所研制的钴铬钼合金DA9-4的各项机械性能指标接近或达到国外同类产品的性能,能够满足临床要求。

关键词: 钴铬钼合金, 支架, 烤瓷修复

Abstract:

Objective To investigate a kind of Co-Cr-Mo alloys used for both porcelain fused to metal (PFM) restorations and casting framework of removable partial dentures.Methods The Co-Cr-Mo alloy underwent the design for elementary compositions of the alloys and the production from the rawmaterials by means of a vacuummelt furnace. The strength, hardness, plasticity and casting ability of the alloywere examined with metal tensile test. Vickers hardness test and grid castingwere examined respective- ly. The microstructure of the Co-Cr-Mo alloy was also inspected by scanning electron microscope and X-ray diffraction analysis. Results The elementary composition of DA9-4 alloy mainly consisted of Co 54%~67%, Cr 21%~26%, Mo 5%~8%, W 5%~8%, Si 1%~3%, Mn 0.1%~0.25% and trace elements. The yield strength of the alloywas 584 MPa, while the ten- sile strengthwas 736 MPa. The coefficient of expansionwas 15.0%, the Vickers hardness reached 322, and the casting ratio exi- bited 100%.Conclusion The DA9-4 Co-Cr-Mo alloy used for PFMand framework shown in this paper can meet the clinical de- mands and have reached the objects of the experiment plan.

Key words: Co-Cr-Mo alloys, frameworks, porcelain fused to metal restorations