Shi Dafang,Yang Jun,Liu Dong,et al.Effect of Aluminum Content on Microstructure and Properties of Fe-1.4C-1.5Cr-Alx Steel[J].Special Steel,2025,46(01):54-58.
Shi Dafang,Yang Jun,Liu Dong,et al.Effect of Aluminum Content on Microstructure and Properties of Fe-1.4C-1.5Cr-Alx Steel[J].Special Steel,2025,46(01):54-58. DOI: 10.20057/j.1003-8620.2024-00115.
Effect of Aluminum Content on Microstructure and Properties of Fe-1.4C-1.5Cr-Alx Steel
The microstructure evolution and hardness change of Fe-1.4C-1.5Cr-Alx ultra-high carbon steel with 2%-6% aluminum content added during quenching and tempering were analyzed. It is found that the addition of Al reduces the precipitation amount of proeutectoid carbides during cooling, and helps to inhibit the formation of network carbides around grain boundaries. After adding 4%-6% Al, the tempering hardness of ultra-high carbon steel is stable between 62HRC-65HRC at 200 ℃-400 ℃, and after adding Al element, the decomposition temperature of nanoscale carbide in the tempering process of the test steel is increased, the tempering resistance stability is improved, and the martensitic decomposition temperature is increased, and the greater the amount of Al element added, the better of the tempering stability and temperature resistance of ultra-high carbon steel.
关键词
Keywords
references
Lesuer D R , Syn C K , Whittenberger J D , et al . Microstructure-property relations in as-extruded ultrahigh-carbon steels [J]. Metallurgical and Materials Transactions A , 1999 , 30 ( 6 ): 1559 - 1568 .
Tsuzaki K , Sato E , Furimoto S , et al . Formation of an (α+θ) microduplex structure without thermomechanical processing in superplastic ultrahigh carbon steels [J]. Scripta Materialia , 1999 , 40 ( 6 ): 675 - 681 .
Chen X M , Liu Y N , Zhu J W , et al . Tribological behavior of 1.41wt% C ultrahigh-carbon steel with quenching and low-temperature tempering treatment [J]. Tribology Letters , 2010 , 38 ( 1 ): 79 - 86 .
Fernández-Vicente A , Carsı́ı́ M , Peñalba F , et al . Toughness dependence on the microstructural parameters for an ultrahigh carbon steel (1.3 wt.% C) [J]. Materials Science and Engineering:A , 2002 , 335 ( 1/2 ): 175 - 185 .
Hecht M D , Picard Y N , Webler B A . Coarsening of inter- and intra-granular proeutectoid cementite in an initially pearlitic 2C-4Cr ultrahigh carbon steel [J]. Metallurgical and Materials Transactions A , 2017 , 48 ( 5 ): 2320 - 2335 .