Scratch behavior of high speed steels for hot rolls

Li Zhou1,2,3), Dale Sun2), Changsheng Liu3), Chunguang Li3), and Lisong Yao2) 1) Shougang Research Institute of Technology, Beijing 100041, China 2) Technology Center, Baosteel Co. Ltd., Shanghai 201900, China 3) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

摘 要：The scratch behaviors of two high speed steels （HSS） for hot rolls were studied by a Micro-combi Tester, and the emphasis was placed on researching the relations between the microstructure and the scratch resistance property of different HSS. The experimental results indicate that during the scratch process, the carbides are embedded into the matrix, the penetration depth of different HSS is closely related with the matrix hardness, i.e., the higher the matrix hardness, the better the scratch resistance property; and in the matrix, the fine, dispersive carbides are beneficial to form steady friction between the indenter and the scratched materials, but the coarser carbides are easier to fall into pieces.

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