Cr26高铬铸铁亚临界处理工艺在热磨机磨片的应用研究  

Sub-critical Heat Treatment and Application of Cr26 high Chromium Cast Iron Refiner Plates

作　　者：孙超[1] 董长河[2] 王毅坚[3] 

机构地区：[1]中国北车集团大连机车车辆有限公司车体车间技术组,辽宁大连116022 [2]中油吉林石化公司电石厂,吉林吉林132022 [3]吉林化工学院机电工程学院,吉林吉林132022

出　　处：《吉林化工学院学报》2012年第11期59-62,共4页Journal of Jilin Institute of Chemical Technology

摘　　要：实验采用亚临界处理方法对Cr26高铬铸铁组织转变及其力学性能进行了实验和应用研究.研究结果表明:该成分高铬铸铁经560℃+1 h亚临界热处理后,金相组织主要由共晶体、Cr7C3碳化物、先共晶奥氏体和部分马氏体组成;硬度由铸态时HRC 47～48提高至HRC 53-54,冲击功达6～8J/cm^2.几年来,该工艺由北京和吉林的两家造纸机械厂应用并取得良好的经济效益.In this study, the microstructure transformation and mechanical properties subjected to sub-critical heat treatment for Cr26 high-chromium cast iron were investigated. The experimental and practical applications were verified. The results show that the corresponding microstrueture consists of strip-shaped Cr7C3 carbides, first euteetic austenite and partial martensite at 560 ~C for 1 h,which is subcritical treatment. The cast hardness HRC 47-48 is increased to HRC 53-54 under the same heat treatment temperature and time. And the value of impact toughness is 8.2J/cm2. In recent years, the process consists of two paper making machinery plant in Beijing and Jilin is applied and achieved good economic benefits.

关 键 词：高铬铸铁 亚临界处理 硬度 冲击韧性 

分 类 号：TG163[金属学及工艺—热处理]