自研牙科低金含量银钯合金与2种商品钯银合金的显微硬度比较

摘要

Objective To compare micro-hardness of experimental low-gold Ag-Pd alloy and 2 commercial Pd-Ag alloy.Methods Prepare 10mm × 10mm × lmm casting from alloys. Specimens from 2 commercial Pd-Ag alloys were treated according to instructions, and the specimens from experimental low-gold Ag-Pd alloy were solution treated and iso-thermal treated at 459℃ followed by quenching. After grinding and polishing, test micro-Vickes' s hardness of all specimens. Results After solution treated, the micro-Vicker' s hardness of experimental low-gold Ag-Pd alloy was 42％ and 39％ of the commercial Pd-Ag alloys, respectively. After iso-thermal treated at 459℃ followed by quenching, the hardness reached 95％ and 89％ of the commercial Pd-Ag alloys, respectively. Conclusion After iso-thermal treatd, the hardness of experimental low-gold Ag-Pd alloy reached 95％and 89％ of the commercial Pd-Ag alloys, respectively, and satisfied the standard of ADA for Ⅳ gold alloy.%目的 比较自研牙科低金含量银钯合金与2种商品牙科合金的显微硬度.方法 分别将3种合金材料铸造为10mm×10mm×1mm的试样.2种商品合金材料按照说明书进行热处理,自研合金材料先进行固溶处理,之后在459℃等温热处理10min后淬火冷却.金相抛光后试样进行显微维氏硬度测量.结果 与2种商品合金相比,自研牙科低金含量银钯合金固溶处理后合金的硬度分别是其显微硬度的42%、39%,热处理后合金的硬度是其显微硬度的95%,89%.结论 自研牙科低金含量银钯合金经过适当的热处理,最高硬度分别达到2种商品合金显微硬度的95%,89%,满足ADA IV类金合金的硬度标准.