英语翻译The addition of rare earth elements can change the morph

英语翻译
The addition of rare earth elements can change the morphology,size and distribution of the nonmetal inclusion in the metal,and reduce the influence of inclusions on theproperties of the metal.Meanwhile,the addition of rare earth elements can improve the property of retarded oxidation and thermal abrasion resistance of the material,and it also can refine the crystallization structure and improve the
mechanical performance and the service life of materials [7].In Ref.[8],the form of carbides is changed from reticulation to fracted reticulation due to the addition of rare earth (RE) elements into high chromium cast iron.In Refs.[9-10],the authors believed that it is difficult to completely modify the structure,morphology and distribution of the eutectic carbide by the addition of rare earth alone.In recent years,
many studies on microstructural modification of cast iron with combination of RE and other elements have been carried out.For example,the combinations of RE [11],RE-Al [12],RE-B [13],RE-V-Ti [14],RE-Mg [15] and RE-Al-B [16] are tried and good results are achieved.
In order to improve the properties of high chromium cast iron,the effects of composite modification with RE,V,Ti and B on the microstructure and properties of high chromium cast iron are studied in this paper based on the work of other researchers [17-19].