残余奥氏体量与喷射成形雾化喷嘴特性的关系  

Relation Between Amount of Retained Austentite and Characteristics of Spray-forming Atomizer

作　　者：周灿栋[1] 樊俊飞[1] 乐海荣[1] 宓小川[1] 刘莲君[1] 

机构地区：[1]宝钢研究院前沿技术研究所,上海201900

出　　处：《宝钢技术》2008年第3期52-54,共3页Baosteel Technology

摘　　要：在相同条件下,采用自行研制的BS喷嘴和原MIT喷嘴喷射后得到喷射成形高速钢圆坯件,比较其显微组织、硬度、密度和残余奥氏体量的分布。结果表明:自行研制的BS喷嘴喷射成形高速钢的圆坯显微组织与MIT喷嘴喷射后的显微组织相近;经过X-射线衍射分析可知前者圆坯中残余奥氏体含量比较高,以致圆坯的密度大,而硬度小。残余奥氏体含量高表明自行研制BS喷嘴的冷却性能强于MIT喷嘴。自主研制的BS喷嘴可以达到MIT喷嘴的性能要求。Under the same conditions, microstructures, hardness, density and amount of retained austentite in the spray-formed high-speed steel billet with the self-developed BS spray-forming atomizer and the MIT spray-forming atomizer were compared. The result shows that the microstructure of spray-formed high-speed steel by the self-developed BS atmizer is close to the one by the MIT atomizer. Through the X-ray diffraction observation, the content of retained austentite in the specimen by using the BS spray-forming atomizer is somewhat higher than that by using the MIT spray-forming atomizer, which results in higher density and lower hardness of the billet. The higher content of retained austentite indicates that the cooling ability of the BS atomizer is stronger than that of the MIT atomizer during the spray forming. The BS spray-forming atomizer can reach the level of the MIT spray-forming atomizer.

关 键 词：残余奥氏体 喷射成形 雾化喷嘴 

分 类 号：TG142.15[一般工业技术—材料科学与工程]