A medium-low carbon medium-low alloy steel with high temperature and high wear resistance and preparation method thereof
A technology of high wear resistance and low alloy steel, applied in the field of alloy steel, can solve the problems of reducing the strength and toughness of alloy steel, and achieve the effect of low cost, low alloy content, and excellent room temperature toughness
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Embodiment 1
[0027] A method for preparing medium-low carbon and medium-low alloy steel with high temperature and high wear resistance is carried out as follows:
[0028] (1) Alloy composition design: On the basis of Cr-Mo alloy steel, determine the chemical composition and mass percentage of the alloy steel, specifically C: 0.25%, Cr: 3%, Mo: 2.2%, Ni: 1.2%, W: 1.2%, V: 0.7%, Nb: 0.06%, and the rest is Fe;
[0029] (2) Smelting: Vacuum ingots are prepared by vacuum melting the above raw materials, purified and smelted by electroslag remelting, protected by argon gas throughout the process, and cooled in a hood after stripping, and the processing time is 26 hours;
[0030] (3) Annealing treatment: Use a heating rate of 90°C / h to raise the temperature to 730°C and keep it warm for 16 hours. After the heat preservation is over, cool it with the furnace and cool it down to 400°C, and finally take it out of the furnace and air cool it;
Embodiment 2
[0043] A method for preparing medium-low carbon and medium-low alloy steel with high temperature and high wear resistance is carried out as follows:
[0044] (1) Alloy composition design: on the basis of Cr-Mo alloy steel, determine the chemical composition and mass percentage of the alloy steel, specifically C: 0.20%, Cr: 2.5%, Mo: 1.5%, Ni: 0.5% , W: 1.5%, V: 0.5%, Nb: 0.05%, and the rest is Fe;
[0045] (2) Melting: Vacuum ingots are prepared by vacuum melting the above raw materials, purified and smelted by electroslag remelting, protected by argon gas throughout the process, and cooled in a hood after stripping, and the processing time is 30 hours;
[0046] (3) Annealing treatment: Use a heating rate of 100°C / h to raise the temperature to 750°C and keep it warm for 15 hours. After the heat preservation is over, cool it with the furnace and cool it down to 400°C, and finally take it out of the furnace and air-cool it;
Embodiment 3
[0053] A method for preparing medium-low carbon and medium-low alloy steel with high temperature and high wear resistance is carried out as follows:
[0054] (1) Alloy composition design: On the basis of Cr-Mo alloy steel, determine the chemical composition and mass percentage of the alloy steel, specifically C: 0.30%, Cr: 3.5%, Mo: 2.5%, Ni: 1.5%, W: 1.0%, V: 1.0%, Nb: 0.09%, and the rest is Fe;
[0055] (2) Smelting: Vacuum ingots are prepared by vacuum melting the above raw materials, purified and smelted by electroslag remelting, protected by argon gas throughout the process, and cooled in a hood after stripping, and the processing time is 24 hours;
[0056] (3) Annealing treatment: Use a heating rate lower than 80°C / h to raise the temperature to 720°C and keep it warm for 18 hours. After the heat preservation is over, cool it with the furnace and cool it down to 400°C, and finally take it out of the furnace and air-cool it;
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