CAJ | 학술논문

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560oC＋1h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HRC47～48提高至HRC53—54，冲击功达6—8J／cm2．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．
실험채용아림계처리방법대Cr26고락주철조직전변급기역학성능진행료실험화응용연구．연구결과표명：해성분고락주철경560oC＋1h아림계열처리후，금상조직주요유공정체、Cr7C3탄화물、선공정오씨체화부분마씨체조성；경도유주태시HRC47～48제고지HRC53—54，충격공체6—8J／cm2．궤년래，해공예유북경화길림적량가조지궤계엄응용병취득량호적경제효익．
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.