Abstract:The types and precipitation behavior of carbides in M2 high speed steel were studied. On the one hand,the scanning electron microscope was used to observe the morphology and distribution of carbides,and the chemical composition of these carbides was detected by energy dispersive spectroscopy. On the other hand,the Thermo-Calc was used to calculate the precipitation of carbides in equilibrium and Scheil model meanwhile. In the M2 HSS after annealing,the large carbides distributed along the network,which included MC,M6C,M2C carbides and mixture of them. After forging,the zonal distribution and accumulation of carbides arised in M2 HSS. MC and M6C carbides precipitate at 1 294 and 1 288 ℃ respectively in equilibrium,higher than the austenitizing temperature. However,in Scheil solidification,MC,M6C and M2C carbide would precipitate in turn. It is difficult to eliminate large carbides in M2 HSS through heat treating and forging,but controlling the precipitation of carbides could be of great significance.
王启明,成国光,黄 宇. M2高速钢大尺寸碳化物的形貌特征及析出机理[J]. , 2018, 53(1): 65-71.
WANG Qi-ming,CHENG Guo-guang,HUANG Yu. Morphology and precipitation mechanism of large carbides in M2 high speed steel. Iron and Steel, 2018, 53(1): 65-71.
Barkalow R H, Kraft R W, Goldstein J I.Solidification of M2 high speed steel[J].Metallurgical Transactions, 1972, 3(4):919-926
[4]
Barkalow R H, Kraft R W, Goldstein J I.Solidification of M2 high speed steel[J].Metallurgical Transactions, 1972, 3(4):919-926
[5]
McLaughlin J, Wayne R, Goldstein J I.Characterization of the solidification structures within the dendritic core of M2 high speed steel[J].Metallurgical Transactions A, 1977, 8(11):1787-1792
[5]
McLaughlin J, Wayne R, Goldstein J I.Characterization of the solidification structures within the dendritic core of M2 high speed steel[J].Metallurgical Transactions A, 1977, 8(11):1787-1792
[6]
Galda E J, Kraft R W.The effects of MO and W on solidification of high speed steels[J].Metallurgical transactions, 1974, 5(8):1727-1733
[6]
Galda E J, Kraft R W.The effects of MO and W on solidification of high speed steels[J].Metallurgical transactions, 1974, 5(8):1727-1733
[7]
Serna M M, Rossi J L.MC complex carbide in AISI M2 high-speed steel[J].Materials Letters, 2009, 63(8):691-693
[7]
Serna M M, Rossi J L.MC complex carbide in AISI M2 high-speed steel[J].Materials Letters, 2009, 63(8):691-693
[8]
Zhou X, Fang F, Li G, et al.Morphology and properties of M2C eutectic carbides in AISI M2 steel[J].ISIJ international, 2010, 50(8):1151-1157
[8]
Zhou X, Fang F, Li G, et al.Morphology and properties of M2C eutectic carbides in AISI M2 steel[J].ISIJ international, 2010, 50(8):1151-1157
[9]
Ghomashchi M R.The morphology of eutectic carbides in M2-grade high speed steel[J].Metallurgical Transactions A, 1985, 16(12):2341-2342
[9]
Ghomashchi M R.The morphology of eutectic carbides in M2-grade high speed steel[J].Metallurgical Transactions A, 1985, 16(12):2341-2342
Chaus A S, Dománková M.Precipitation of secondary carbides in M2 high-speed steel modified with titanium diboride[J].Journal of materials engineering and performance, 2013, 22(5):1412-1420
[11]
Chaus A S, Dománková M.Precipitation of secondary carbides in M2 high-speed steel modified with titanium diboride[J].Journal of materials engineering and performance, 2013, 22(5):1412-1420
[12]
Inoue A, Masumoto T.Carbide reactions (M3C→ M7C3→ M23C6→ M6C) during tempering of rapidly solidified high carbon Cr-W and Cr-Mo steels[J].Metallurgical Transactions A, 1980, 11(5):739-747
[12]
Inoue A, Masumoto T.Carbide reactions (M3C→ M7C3→ M23C6→ M6C) during tempering of rapidly solidified high carbon Cr-W and Cr-Mo steels[J].Metallurgical Transactions A, 1980, 11(5):739-747
Fredriksson H, Hillert M, Nica M.The Decomposition of the M 2 C Carbide in High Speed Steel[J].Scandinavian Journal of Metallurgy, 1979, 8(3):115-122
[14]
Fredriksson H, Hillert M, Nica M.The Decomposition of the M 2 C Carbide in High Speed Steel[J].Scandinavian Journal of Metallurgy, 1979, 8(3):115-122
[15]
Pan F, Wang W, Tang A, et al.Phase transformation refinement of coarse primary carbides in M2 high speed steel[J].Progress in Natural Science: Materials International, 2011, 21(2):180-186
[15]
Pan F, Wang W, Tang A, et al.Phase transformation refinement of coarse primary carbides in M2 high speed steel[J].Progress in Natural Science: Materials International, 2011, 21(2):180-186
Boccalini Jr M, Correa A V O, Goldenstein H.Rare earth metal induced modification of γ-M2 C,γ-M6 C,and γ-MC eutectics in as cast M2 high speed steel[J].Materials science and technology, 1999, 15(6):621-626
[19]
Boccalini Jr M, Correa A V O, Goldenstein H.Rare earth metal induced modification of γ-M2 C,γ-M6 C,and γ-MC eutectics in as cast M2 high speed steel[J].Materials science and technology, 1999, 15(6):621-626