消失模铸造制备奥-贝球铁CBN砂轮胎体  

Manufacturing of Austenite-bainite Ductile Iron for CBN Grinding Wheels′Matrix by LFC Process

作　　者：侯宁[1] 戴秋莲[1] 骆灿彬[1] 尤芳怡[1] 

机构地区：[1]华侨大学脆性材料加工技术教育部工程研究中心

出　　处：《特种铸造及有色合金》2014年第3期290-293,共4页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51175192;51375180)

摘　　要：根据高速磨削用CBN砂轮的尺寸大小和胎体的性能要求,通过合金化处理和冷却速度的控制使其在消失模铸造工艺条件下获得CBN砂轮用高性能的奥氏体-贝氏体复相组织球墨铸铁胎体。结果表明,针对20mm厚试样,添加适量的Cr、Ni、Mo、Cu元素,控制合适的开箱时间,在奥氏体-贝氏体转变温度范围内把铸件放在硅酸铝纤维棉保温,可以获得奥氏体-贝氏体球墨铸铁,最高硬度(HRC)可达55,最大抗拉强度可达1000MPa左右。The austenite-bainite ductile iron for high speed grinding CBN wheels matrix was prepared by alloying treatment and controlling cooling velocity according to the demand for its size and properties in the lost foam casting （LFC） process. Experimental results reveal that for the samples with 20 mm in thickness, by adding appropriate amounts of Cr, Ni, Mo, Cu and controlling the open-mold time of the casting, as well as keeping the castings using aluminum silicate fiber cotton in the austenite-bainite transformation temperature range, austenite - bainite ductile iron with the maximum hardness of 55 HRC and maximum tensile strength of 1000 MPa can be obtained.

关 键 词：合金化 消失模铸造 冷却速度 奥-贝球铁胎体 

分 类 号：TG249.6[金属学及工艺—铸造]