自制铸钛包埋材料包埋方法和铸模冷却方式的研究  

Research on Investing Methods and Mold Cooling Methods of the Self-made Investment for Pure Titanium Castings

作　　者：赵鹃[1] 黄旭[2] 赵云凤[3] 肖茂春[3] 李勇[3] 

机构地区：[1]浙江大学医学院附属口腔医院修复科,浙江杭州310006 [2]浙江大学医学院附属第一医院口腔科,浙江杭州310003 [3]四川大学华西口腔医院修复科,四川成都610041

出　　处：《华西口腔医学杂志》2006年第5期410-414,共5页West China Journal of Stomatology

摘　　要：目的综合考察不同包埋方法和铸模冷却方式对自制铸钛包埋材料纯钛铸件多种性能的影响。方法研究自制铸钛包埋材料的一次包埋法和二次包埋法对纯钛铸件的流铸率和全冠铸造精度的影响,以及铸造后铸圈自然冷却方式和骤冷方式对纯钛铸件的反应层、力学性能及全冠铸造精度的影响。结果一次包埋组和二次包埋组钛铸件的流铸率均为100%,但一次包埋组铸钛全冠适合性较好,达到临床要求。自然冷却组钛铸件表面的反应层厚度(115μm)较骤冷组(100μm)厚,铸件强度较骤冷组高(P<0.05),而两组的延伸率无统计学差异:自然冷却组全冠适合性较好,达到临床要求。结论自制铸钛包埋材料试料宜采用一次包埋法和铸模自然冷却方式。Objective To observe the influence of different investing methods and mold cooling methods on pure titanium castings invested in the self-made investment, and to provide theoretic base for the development for the investment. Methods The influence of investing methods （one-step investing method and two-step investing method） on castability and crown fit of titanium castings were investigated, and the influence of cooling methods on reaction layers, mechanical properties and crown fit of titanium castings were investigated. Results Both the investing methods exhibited good castability, but only the titanium full crowns by one-step investing method showed clinically acceptable fit. Although the quenching group showed thinner reaction layer（100μm）, lower strength and similar elongation rate, the titanium castings by bench cooling showed clinically acceptable full crown fit with 115μm thick reaction layer as cast. Conclusion The one-step investing method and the bench cooling are recommended for the self-made investment.

关 键 词：钛 铸造 包埋方法 冷却方式 

分 类 号：R783.2[医药卫生—口腔医学]