钢渣微晶玻璃的研究-材料学专业论文.docxVIP

撼 撼 要 本文对矿渣皴鑫毅璃豹发震嚣史、利餐菠本及荚应蠲终了较系统熬练述。以 高炉渣、钢渣和其它天然矿物原料为主要原料，Cr203、锚英砂为主晶核剂，采用 熔疆法涮备了疲渣鼹羹在50wt％疆上瓣钢渣微晶玻璃。蠲X骞砉线锯翦仪测定了夸芎 料的物相组成，其主晶相为普通辉石(CaMg(Si03)2)和透辉石(CaFe，Mg(Si03)2)， 孺扫搐电子显徽镜镜观察了辛辛精的显徽结构，箕鑫粒尺寸为1～29m。 f实验表明，Cr203是钢渣微晶玻璃有效的晶核剂，以引入o．4wt％为最佳，增 热dr203的弓|入量不拳j于玻璃的熔鞠。锆英砂提高玻璃的稿度，馒玻璃的核化温度 和晶化温度升高，有效地抑制晶体长大。未引入锆英砂时晶粒超过109m，而引入 6wto／，潞英砂时晶粒小于29m，其用量不宜超过6wt％。随着钢渣引入量的增加，玻 璃的核化湿度和晶化瀑度均降低，材料中辉石类晶体的柝蹦相应增加。添加一定 量SiC作为还原剂有利于玻璃中的Fe203部分还原为Fe30a，促进了玻璃的核化和 晶化。SiC魄弓l入量以1wt％为佳，当Bl入达3wt％时，玻璃中有愈属铁板出。该 钢渣微晶玻璃的主要的性能为：抗折强度276MPa：显微硬度为11．9GPa；耐磨性 为GCrl曼镪懿13售。 利用正交分析确定钢渣玻璃的最佳热处理制度，其工艺参数为：以5～7。C／min 舞至840。C，核化僳浚臻；然后戳3～4。C／min舞至920。C，鑫化探温lh，然后藏 炉冷却。核化温度对材料的力学性能影响最3v，而核化保瀣时间影响最小。y 关键词：钢渣 徽鑫玻璃 鑫核剂 黼{乏工絮注髓 ／7、／ k／ u《 AbstractThe Abstract The development，fabrication and applications of slag glass—ceramics were reviewed．A steel slag glass。ceramics was prepared．by melting method with a total slag more than 50wt％including blast furnace slag and steel．slag．Other materials are mineral like quarts and nucleating agent Cr203 and ZrSi04．The glass—ceramics shows a bending strength 276MPa，Viker—hardness of 1 1．9GPa and a wear of 7．5％as that of GCrl 5 steel．The phase compositions of the glass—ceramics were analyzed by XRD，the main crystallines are diopside((CaMg(Si03)2)and pyroxene(CaFe，Mg(Si03)2)． Microstructure of glass-ceramics were observed by SEM．The crystal size is about 1-2 gm． Experiments showed that Cr203 can effectively prompt crystallization of the glass，the optimal content of Cr203 is O．4wt％，with the increasing of Cr203，the glass become hard to melt．ZrSi04 increases both the nucleation and crystallization temperature，and can inhibit the growth of the crystal in the-glass．When no ZrSi04 is added，the crystal size ofthe glass-ceramics is over 109m．When 6wt％ZrSi04 is added in the glass，the crys乜l size is less than 29in．With the increase of steel slag，the nucleation and crystallization temperature decrease and pyroxene crystalline become more according to the result of XRD．Reducing reagent SiC is g