Effect of austenitization temperature on microstructure and mechanical properties of low-carbon-equivalent carbidic austempered ductile iron  

作　　者：vinayak dakre d.r.peshwe s.u.pathak ajay likhite Vinayak Dakre;D.R.Peshwe;S.U.Pathak;Ajay Likhite(department of metallurgical&materials engineering,visvesvaraya national institute of technology,Nagpur 440010,India)

机构地区：Department of Metallurgical ＆ Materials Engineering,Visvesvaraya National Institute of Technology,Nagpur 440010,India

出　　处：《International Journal of Minerals,Metallurgy and Materials》2018年第7期770-778,共9页矿物冶金与材料学报（英文版）

摘　　要：The wear resistances of austempered ductile iron （ADI） were improved through intxoduction of a new phase （carbide） into the ma- txix by addition of chromium. In the present investigation, low-caxbon-equivalent ductile iron （LCEDI） （CE = 3.06%, and CE represents cax- bon-equivalent） with 2.42% chromium was selected. LCEDI was austeintized at two difl＇erent temperatures （900 and 975~C） a^ld soaked for 1 h and then quenched in a salt bath at 325~C for 0 to 10 h. Samples were analyzed using optical microscopy and X-ray diffraction. Wear tests were carded out on a pin-on-disk-type machine. The efl＇ect of austenization temperature on the wear resistance, impact strength, and the mi- crostructure was evaluated. A stxucture-property correlation based on the observations is established.The wear resistances of austempered ductile iron （ADI） were improved through intxoduction of a new phase （carbide） into the ma- txix by addition of chromium. In the present investigation, low-caxbon-equivalent ductile iron （LCEDI） （CE = 3.06%, and CE represents cax- bon-equivalent） with 2.42% chromium was selected. LCEDI was austeintized at two difl＇erent temperatures （900 and 975~C） a^ld soaked for 1 h and then quenched in a salt bath at 325~C for 0 to 10 h. Samples were analyzed using optical microscopy and X-ray diffraction. Wear tests were carded out on a pin-on-disk-type machine. The efl＇ect of austenization temperature on the wear resistance, impact strength, and the mi- crostructure was evaluated. A stxucture-property correlation based on the observations is established.

关 键 词：low carbon equivalent ductile iron （LCEDI） caxbidic austempered ductile iron （CADI） wear test austenitization temperature impact strength 

分 类 号：TG143.5[一般工业技术—材料科学与工程] TG163[金属学及工艺—金属材料]