High strength and toughness steel rail for crane and manufacturing method thereof
A high-strength toughness, crane technology, applied in the direction of manufacturing tools, metal rolling, furnace types, etc., can solve the limitations, the tensile strength can only reach more than 1250MPa, and the process is stipulated, etc., to achieve the effect of good toughness
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Embodiment 1
[0035] Table 1 is the specific composition design of the embodiment 1 of the present invention and the comparative example.
[0036] Table 1 specific chemical composition
[0037] Sample number C Si mn P S Cr Mo Nb V Ti Ni N 1 0.20 1.65 2.20 0.015 0.008 0.45 0.44 0.015 - 0.008 0.45 0.0042 comparative example 0.87 0.54 0.76 0.011 0.006 0.24 - 0.04 0.089 0.024 - 0.0080
[0038] Table 2 is the production process of Example 1 of the present invention and the comparative example.
[0039] Table 2 Conditions of continuous casting slab heating and controlled rolling temperature
[0040]
[0041] Table 3 shows the test results of tensile, impact properties and hardness of Example 1 of the present invention and comparative examples.
[0042] Table 3 Tensile, impact properties and hardness
[0043]
Embodiment 2
[0045] Table 4 is the specific composition design of the embodiment 2 of the present invention and the comparative example.
[0046] Table 4 specific chemical composition
[0047] Sample number C Si mn P S Cr Mo Nb V Ti Ni N 2 0.24 1.55 1.90 0.017 0.009 0.70 0.35 0.04 - 0.010 0.30 0.0036 comparative example 0.87 0.54 0.76 0.011 0.006 0.24 - 0.04 0.089 0.024 - 0.0080
[0048] Table 5 shows the production process of Example 2 of the present invention and the comparative example.
[0049] Table 5 Conditions of continuous casting slab heating and controlled rolling temperature
[0050]
[0051] Table 6 shows the test results of tensile, impact properties and hardness of Example 2 of the present invention and comparative examples.
[0052] Table 6 Tensile, impact properties and hardness
[0053]
Embodiment 3
[0055] Table 7 is the specific composition design of the embodiment 3 of the present invention and the comparative example.
[0056] Table 7 specific chemical composition
[0057] Sample number C Si mn P S Cr Mo Nb V Ti Ni N 3 0.28 1.40 2.30 0.018 0.005 0.37 0.40 0.02 - 0.015 0.56 0.0050 comparative example 0.87 0.54 0.76 0.011 0.006 0.24 - 0.04 0.089 0.024 - 0.0080
[0058] Table 8 shows the production process of Example 3 of the present invention and the comparative example.
[0059] Table 8 Conditions of continuous casting slab heating and controlled rolling temperature
[0060]
[0061] Table 9 shows the test results of tensile, impact properties and hardness of Example 3 of the present invention and comparative examples.
[0062] Table 9 Tensile, impact properties and hardness
[0063]
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