High-strength cold-formed automobile axle housing steel and production method thereof
A production method and technology for axle housing steel, which are applied in the field of steelmaking, can solve the problems of unstable coil winding performance and low strength level, etc., and are beneficial to vehicle weight reduction, improvement of tensile strength level, and improvement of comprehensive mechanical properties. Effect
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Embodiment 1
[0053] In the embodiment of the present invention, a 220-ton converter is used for smelting, and a 2250 hot continuous rolling production line is used for rolling. The target width of the finished steel plate is 1800 mm, and the thickness is 8 mm. The specific steps of smelting are as follows:
[0054] S1: Slabs are obtained after molten steel is smelted in a converter; the content of P and S is strictly controlled during the smelting process to ensure the quality of the slabs. The chemical composition of the slab is as follows: calculated by mass percentage, C: 0.045%, Si: 0.52%, Mn: 0.90%, P: 0.017%, S: 0.005%, Al: 0.025%, Nb: 0.075%, Cr: 0.56 %, the balance is Fe and unavoidable impurities.
[0055] S2: put the billet into the heating furnace for heating, the heating temperature is controlled at 1160° C., and the holding time is controlled at 215 minutes.
[0056] S3: putting the heated billet into a rolling mill for rolling to obtain a hot-rolled plate. Wherein, the entr...
Embodiment 2
[0061] In the embodiment of the present invention, a 220-ton converter is used for smelting, and a 2250 hot continuous rolling production line is used for rolling. The target width of the finished steel plate is 1800mm, and the thickness is 10mm. The specific steps of smelting are:
[0062] S1: Slabs are obtained after molten steel is smelted in a converter; the content of P and S is strictly controlled during the smelting process to ensure the quality of the slabs. The chemical composition of the slab is as follows: calculated by mass percentage, C: 0.052%, Si: 0.60%, Mn: 1.05%, P: 0.012%, S: 0.002%, Al: 0.035%, Nb: 0.078%, Cr: 0.60 %, the balance is Fe and unavoidable impurities.
[0063] S2: put the billet into the heating furnace for heating, the heating temperature is controlled at 1180° C., and the holding time is controlled at 210 minutes.
[0064] S3: putting the heated billet into a rolling mill for rolling to obtain a hot-rolled plate. Among them, the entrance temp...
Embodiment 3
[0069] In the embodiment of the present invention, a 220-ton converter is used for smelting, and a 2250 hot continuous rolling production line is used for rolling. The target width of the finished steel plate is 1800mm, and the thickness is 10mm. The specific steps of smelting are:
[0070] S1: Slabs are obtained after molten steel is smelted in a converter; the content of P and S is strictly controlled during the smelting process to ensure the quality of the slabs. The chemical composition of the slab is as follows: calculated by mass percentage, C: 0.060%, Si: 0.65%, Mn: 1.00%, P: 0.011%, S: 0.004%, Al: 0.038%, Nb: 0.085%, Cr: 0.58 %, the balance is Fe and unavoidable impurities.
[0071] S2: put the billet into the heating furnace for heating, the heating temperature is controlled at 1170° C., and the holding time is controlled at 210 minutes.
[0072] S3: putting the heated billet into a rolling mill for rolling to obtain a hot-rolled plate. Among them, the entrance temp...
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Abstract
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