Compound microalloy hot die steel with high heat resistance and preparation method thereof
A technology of hot work die steel and microalloying, which is applied in the field of die steel manufacturing technology, can solve the problems of low comprehensive performance level of hot work die steel, low quality of domestic alloy die steel, easy cavity collapse or deformation, etc., to achieve High hardness, strong market adaptability, and excellent impact toughness
Inactive Publication Date: 2010-05-19
SHANGHAI UNIV
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The invention relates to a compound microalloy hot die steel material with high heat resistance and a preparation method thereof, belonging to the technical field of the manufacture process of die steel. The invention is characterized by comprising the following components by weight percent: 0.25% to 0.4% of C, 1.0% to 1.8% of Si, 0.01% to 0.3% of Mn, 3.5% to 5.0% of Cr, 2.0% to 3.5% of Mo, 0.8% to 1.5% of V, 0.03% to 0.07% of Nb, 0.05% to 0.1% of rare earth element (Ce+La), less than 0.02% of P, less than 0.02% of S and the balance of Fe. The preparation method of the hot die steel comprises the process of: (1) adding rare earth after melting; (2) remelting electroslag; (3) homogenizing at high temperature; (4) forging and dissolving solid; (5) spheroidizing annealing; and (6) heating to finally prepare the hot die steel. The hot die steel has the advantages of high purity, high heat resistance, good heat stability and excellent heat fatigability.
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Property | Measurement | Unit |
Room temperature impact toughness | 288.0 | J/cm² |
Hardness value | >= 40.0 | hrc |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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