65Nb钢冷镦模具回火组织变化与耐磨性的关系  

The Relationship Between Tempering Tissue Change of 65Nb Steel Cold Heading Die and Wear Resistance

作　　者：黄敏纯[1] 

机构地区：[1]福州大学机械工程及自动化学院,福建福州350002

出　　处：《合肥学院学报（自然科学版）》2004年第1期43-45,共3页Journal of Hefei University :Natural Sciences

摘　　要：基体钢(65Nb)冷镦模具经超低温工艺处理后微观组织发生了变化,即从回火马氏体中析出碳化物微粒,残余奥氏体转变成马氏体并析出微细碳化物。这种组织变化可显著提高模具的耐磨性和冲击韧度。The microstructure change of matrix steel (65Nb) cold heading die by cryogenic technological treatment is researched in this paper, i.e. the carbide micro granules are separated from tempering martensite, retained austenite changes to martensite and separates fine carbide. This tissue change may obviously improve the wear resistance of die and impact toughness, so the life of die will be prolonged greatly as well.

关 键 词：基体钢 回火马氏体 碳化物 耐磨性 超低温工艺 冷镦模具 

分 类 号：TG162.8[金属学及工艺—热处理] TG76[金属学及工艺—金属学]