摘要
如何提高足金首饰硬度是首饰行业研究方向之一。以足金样品为研究对象,采用单辊熔甩法,使用XRD、DSC、SEM、显微硬度仪初步研究了不同冷却速度下足金的组织结构和硬度,分析了足金样品在不同冷却速度下组织结构和硬度变化的规律。结果表明:快速凝固后足金条带仍是单一的面心立方结构,存在亚稳相;随着冷却速度的提高,晶粒逐渐细化,最小晶粒直径约2μm;以22 m/s冷却速度甩带后足金样品的硬度有了较大提高,约为原来硬度(退火态)的1.6倍,但随着冷却速度继续升高,足金的硬度未见明显变化。
How to improve the hardness of pure gold jewelry is one of the research directions in the jewelry industry.The ribbons of pure gold were prepared by a single-roller melt-spinning,and the effect of rapid solidification on the structure and properties of pure gold strips was studied using XRD,DSC,SEM,microhardness tester.The results show that after the rapid solidification,there is still a single cubic structure with metastable phase.As the cooling rate increases,the grains gradually refine,with a minimum grain diameter of about 2μm.After cooling at 22 m/s,the hardness of the gold sample has significantly improved,approximately 1.6 times the hardness of the original pure gold sample(in the annealed state).However,as the cooling rate continues to increase,the hardness of the pure gold does not change significantly.
作者
李桂华
黄准
李倩倩
孙永军
王岳
刘雪松
王萍
LI Guihua*;HUANG Zhun;LI Qianqian;SUN Yongjun;WANG Yue;LIU Xuesong;WANG Ping(Shandong Provincial Key Laboratory of Metrology and Measurement,Shandong Institute of Metrology,Jinan 250014,China;National Gold&Diamond Testing Center,Jinan 250014,China;Jinan Transportation Development Investment Co.,Ltd.,Jinan 250101,China)
出处
《超硬材料工程》
CAS
2024年第2期65-68,共4页
Superhard Material Engineering
基金
山东省计量科学研究院科技项目(sdimkj202144)。
关键词
足金
熔甩法
组织结构
硬度
pure gold
melt-spinning
structure
hardness
