火试金分析中退火工艺的研究  

Study on Annealing Process on Test Results in Fire Assay

作　　者：李桂华 黄准[1,2] 王萍 祝培明[1] 丁秀云 刘雪松[1,2] LI Guihua;HUANG Zhun;WANG Ping;ZHU Peiming;DING Xiuyun;LIU Xuesong(Shandong Provincial Key Laboratory of Metrology and Measurement,Shandong Institute of Metrology,Jinan 250014,China;National Gold&Diamond Testing Center,Jinan 250014,China)

机构地区：[1]山东省计量科学研究院山东省计量检测重点实验室,济南250014 [2]国家黄金钻石制品质量监督检验中心,济南250014

出　　处：《贵金属》2019年第S01期137-140,共4页Precious Metals

基　　金：山东省质量技术监督系统科技计划项目(2017KY12Z00)

摘　　要：研究了火试金分析过程中退火工艺对检测结果的影响,分别采用扫描电镜和显微硬度仪研究了不同退火条件下金银合金的组织结构和力学性能。结果表明,火枪退火和炉内退火对金含量的检测影响不大,两种退火方式下的金银合金具有相似的微区结构和力学性能。炉内退火操作条件可为400℃退火10 min,或500℃退火5 min以上。The effects of annealing process on the test results during the fire assay were studied.The microstructure and mechanical properties of gold-silver alloys under different annealing conditions were investigated by scanning electron microscopy and micro-hardness tester.The results show that the gun annealing and furnace annealing have little effect on the detection of gold content,which is attributed to the similar micro-domain structure and mechanical properties of the gold-silver alloys under the two annealing modes.The furnace annealing conditions can be annealed at 400℃ for 10 min,or at 500℃ for more than 5 min.

关 键 词：分析化学 火试金 退火 金银合金 显微硬度 

分 类 号：O655.1[理学—分析化学] TS934.3[理学—化学]