8Tsubouchi K, Akiyama M, Yamamoto E, et al. Development of a new tool material to ensure high performance in hot steel rolling[J].Journal of tribology,1999,121(4): 739-745.
9Li yanjun, Jiang qichuan, Zhao yuguang, et al. Influence of cerium on solidification microstructure of M2 high speed steel[J]. Jpurnal rare earths, 2000,18(2):132-135.
10Kheirandish Sh, Mirdamadi Sh, Kharrazi Y H K. Effect of titanium on cast structure of high speed steel[J]. Materials sci-ence and technology, 1998,14(4):312-316.
