Graphitization of Spray-formed Ultrahigh Carbon Steels Containing Si during Hot Rolling

材料科学技术（英）, 2005, 21(2): 161-164.

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1.Key Lab. For High Temperature Materials ＆ Tests of Ministry of Education, Shanghai Jiao Tong University,Shanghai 200030, China

2.Key Lab. For High Temperature Materials ＆ Tests of Ministry of Education, Shanghai Jiao Tong University,Shanghai 200030, China

3.Shanghai Baosteel Research Institute, Shanghai 201900, China

4.Shanghai Baosteel Research Institute, Shanghai 201900, China

5.Shanghai Baosteel Research Institute, Shanghai 201900, China

6.Shanghai Baosteel Research Institute, Shanghai 201900, China

Graphitization of Spray-formed Ultrahigh Carbon Steels Containing Si during Hot Rolling

Keywords： Graphitization

The graphitization behavior of ultrahigh carbon steels containing Si in hot rolling processes was investigated. The graphite stringers went mostly through the small pores and generally paralleled to the rolling direction. The influence of alloy elements on graphitization was estimated based on thermodynamics, which showed that Si content was important for graphitization. Graphite stringers nucleated at small pores and grew with carbon diffusion during hot rolling. Alloy contents, pores and hot deformation at γ+Fe3C phase range were the key factors for the formation of graphite. The probable effect of deformation on graphite formation during hot rolling was discussed in this paper.

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Graphitization of Spray-formed Ultrahigh Carbon Steels Containing Si during Hot Rolling

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