Method for preparing manganese chilled bainitic steel
A bainitic steel and manganese-based technology, applied in the field of alloy steel, can solve problems such as failure to achieve quenching to improve microstructure and mechanical properties, failure to properly solve problems such as quenching deformation and cracking
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[0024] In the method for preparing manganese quenched bainite steel proposed in the present invention, after being smelted by a conventional steelmaking process, the weight percentage of each component in the steel can be:
[0025] C: 0.06-0.54%
[0026] Mn: 1.80-3.50%
[0027] Si: 0.20-1.80%
[0028] Cr: 0-1.60%
[0029] Mo: 0-3.00%
[0030] W: 0-3.00%
[0031] Ni: 0-3.00%
[0032] Ti: 0-0.12%
[0033] V: 0-0.12%
[0034] Nb: 0-0.12%
[0035] N 0-0.02%
[0036] B: 0-0.01%
[0037] The rest is Fe;
[0038] Forging, rolling or casting the above steel into products, air-cooling to 480℃-700℃, then water cooling or oil cooling or salt-alkali liquid cooling to 200℃-250℃ (or reheating to 30 above the critical point of austenite transformation) -50℃, air cooling to 480℃-700℃, then water cooling or oil cooling or salt-liquid cooling to 200℃-250℃), then take out air cooling or slow cooling to room temperature; heat the above products to 200℃-600℃ , Heat preservation for 1-5 hours for tempering treatmen...
Example Embodiment
[0041] The preparation method of Example 1 is as follows:
[0042] (1) After conventional steelmaking, forging, rolling or casting with converter or electric furnace, air cooling to 480°C, then water cooling to 250°C, then air cooling to room temperature;
[0043] (2) Heat the above-mentioned product to 200°C and keep it for 5 hours for tempering treatment.
Example Embodiment
[0044] The preparation method of Example 2 is as follows:
[0045] (1) After conventional steelmaking, forging, rolling or casting with converter or electric furnace, air-cooled to 500°C, then water-cooled to 250°C, and then air-cooled to room temperature;
[0046] (2) Heat the above-mentioned product to 350°C and keep it for 3 hours for tempering treatment.
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