高温钢坯防氧化涂料用易熔玻璃粘结剂的制备及改性  

Preparation and Modification of Low Melting Glass as High Temperature Oxidation-resistant Coatings Binder for Steel Ingots

作　　者：王书华[1,2] 魏连启[1] 仉小猛[1] 周旬[1,2] 王晓婧[1,2] 叶树峰[1] 陈运法[1] 

机构地区：[1]中国科学院过程工程研究所多相复杂系统国家重点实验室,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《过程工程学报》2011年第5期863-868,共6页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:50774073);中国科学院知识创新工程重要方向基金资助项目(编号:KGCX2-yw-224)

摘　　要：为使防氧化涂料在高温普碳钢坯上粘附,熔制了P2O5-ZnO-Na2O系基础玻璃,用B2O3,Fe2O3,MnO,CoO,NiO进行改性并对其性能进行了表征.结果表明,粘结剂在升温过程中有晶相析出,用B2O3和Fe2O3改性后其软化温度为750℃,继续用MnO,CoO,NiO改性其软化温度为596℃;热处理前粘结剂为无定型玻璃态,用B2O3和Fe2O3改性后于476℃保温10min,主要有Zn(PO3)2晶体析出,用B2O3,Fe2O3,MnO,CoO,NiO改性后于428℃保温10min,主要有Ni(PO3)2析出;晶相析出后,玻璃的软化温度提高54℃.将不同易熔玻璃作为高温粘结剂,软化温度是决定高温瞬间粘附性能的重要因素.粘结剂加入涂料中,实现了涂料在高温钢坯上瞬间粘附,实验室防氧化效果为59.24%,简要分析了涂料和玻璃粘结剂的结合机理.The low melting glass used as a binder for high-temperature plain carbon steel was synthesized by P2O5,ZnO,and Na2O,then modified with B2O3,Fe2O3,MnO,CoO,and NiO.The results of DTA and XRD showed that the low-melting glasses could be changed to glass-ceramic with heat treatment.Zinc phosphate was precipitated from the A glass which modified with B2O3 and Fe2O3 after the heat treatment,while nickel phosphate was precipitated from the glass C which modified with B2O3,Fe2O3,MnO,CoO and NiO.The softening temperature of the glass A was 750℃,and 596℃ for glass C,while the glass-ceramic C was increased by 54℃.Softening temperature is an important factor to affect the adhesion property of the low-melting glasses.The modified glass could be used as a binder,which provided a good adhesion for coatings on high temperature steel substrate,and effect of oxidation resistance was 59.24% in the experiment.The reaction mechanism between the coating,glass binder and the iron oxides was also elaborated.

关 键 词：高温粘结剂 易熔玻璃 微晶玻璃 钢坯防氧化涂料 

分 类 号：TQ171.73[化学工程—玻璃工业]